"So Many Moons" - When Mindy is concerned that the possible addition of a younger sibling to her family might be a challenge, Jet says imagine having a family with more than 60 siblings! That's what it's like for the 67 moons of Jupiter. Curriculum: Kids may think that a planet would only have one moon, maybe two. But the larger outer planets, the gas giants, have many moons - Jupiter and Saturn leading the count with more than 60 moons each! What's more, the moons of Jupiter are not all just round, gray rocks - they are extremely varied, from volcanic Io, covered with volcanic activity; to Europa, with an icy surface covering an underground ocean; to Ganymede, a moon so large it's actually bigger than the planet Mercury!"Project Pluto" - When Mindy is excited about presenting her kid model of Pluto for school show and tell, the other kids don't want to disappoint her by breaking the news to her that Pluto is not a planet. Curriculum: Pluto is no longer considered a planet; astronomers in the scientific community re-classified Pluto as a planetoid. It is one of five "planetoids," or "dwarf planets. There are three criteria a celestial body must meet in order to be considered a planet: it must orbit the Sun, have enough mass, and "clear the neighborhood."

Sunspot needs to climb one more mountain to join an elite space climbing club - and the mountain happens to be Mt. Sharp, on Mars! Jet convinces the kids to fly to Mars with Sunspot and join the mountain climbing expedition.With all the Earthie kids away for the day, Jet and Sunspot are left to their own devices. They notice neighbor Mitchell digging for buried treasure in his yard, and decide to make and bury their own treasure, then make a map that Mitchell can find and follow to their homemade treasure!

Sunspot needs to climb one more mountain to join an elite space climbing club - and the mountain happens to be Mt. Sharp, on Mars! Jet convinces the kids to fly to Mars with Sunspot and join the mountain climbing expedition.With all the Earthie kids away for the day, Jet and Sunspot are left to their own devices. They notice neighbor Mitchell digging for buried treasure in his yard, and decide to make and bury their own treasure, then make a map that Mitchell can find and follow to their homemade treasure!

The kids observe the full Moon at night and wonder why it seems to have a "face." They research why the light and dark splotches seem to make a face, and ultimately decide to fly to the Moon's surface so they can see for themselves what the light and dark splotches are made of.The kids are digging again down by the Lake, and dig up a part of an old rocket. This leads Sydney to tell another "Lone Star" story, this one about how long ago, when Boxwood Terrace was called "Boxwood Territory," early astronomer Lone Star engineered and built the first rockets. This inspires the kids to engineer and build their own "foot rocket."

"Sunspot and the Great Red Spot" - Sunspot is determined to get to Jupiter to meet his fellow pet aliens, other members of the Red Spot Club. The Club is thousands of years old. They meet annually at an exact time to observe and celebrate the Red Spot. But, mechanical problems with the family wagon/saucer may thwart the trip. The kids and Celery do everything they can to get Sunspot to Jupiter and his Red Spot Club meet-up. Curriculum: The Great Red Spot is an enormous, high-pressure storm akin to an Earth hurricane that has been raging on the surface of Jupiter for at least 400 years."Uncle Zucchini Babysits" - Uncle Zucchini finally gets to Earth for a visit, just as the Propulsion parents are called away on a work assignment. Uncle Zucchini volunteers to watch the kids. In the process of helping the kids coax Sunspot into taking a bath, Uncle Zucchini learns about the three states of water (solid, liquid, and gas). Curriculum: What is water and how does it change from one form to another? Water exists in three different states: solid, liquid, and gas. Clouds, snow, and rain are all made up of some form of water. Temperature and pressure can change water from solid (ice) to liquid (wet) to gas (vapor).

"Sunspot and the Great Red Spot" - Sunspot is determined to get to Jupiter to meet his fellow pet aliens, other members of the Red Spot Club. The Club is thousands of years old. They meet annually at an exact time to observe and celebrate the Red Spot. But, mechanical problems with the family wagon/saucer may thwart the trip. The kids and Celery do everything they can to get Sunspot to Jupiter and his Red Spot Club meet-up. Curriculum: The Great Red Spot is an enormous, high-pressure storm akin to an Earth hurricane that has been raging on the surface of Jupiter for at least 400 years."Uncle Zucchini Babysits" - Uncle Zucchini finally gets to Earth for a visit, just as the Propulsion parents are called away on a work assignment. Uncle Zucchini volunteers to watch the kids. In the process of helping the kids coax Sunspot into taking a bath, Uncle Zucchini learns about the three states of water (solid, liquid, and gas). Curriculum: What is water and how does it change from one form to another? Water exists in three different states: solid, liquid, and gas. Clouds, snow, and rain are all made up of some form of water. Temperature and pressure can change water from solid (ice) to liquid (wet) to gas (vapor).

"Total Eclipse of the Sunspot" - While Mindy, Jet, Sean, and Sydney are trying to use a solar panel to improve their energy efficiency, they notice that Sunspot is acting strange. It turns out that Sunspot was aware of an impending eclipse and was trying to alert the kids to the fact that the Sun would be darkened for a while. Curriculum: A solar eclipse is a type of eclipse that occurs when the Moon passes between the Sun and Earth, and the Moon fully or partially blocks the Sun. In a total eclipse, the disk of the Sun is fully obscured by the Moon. It's important not to look directly at the Sun during an eclipse, but you can watch it through the use of a box viewer."Sean's Year in Space" - Sean is excited by NASA's "Year in Space" program on the ISS, and decides to try to live for a year in the tree house without ever coming down. The kids keep interrupting him, and finally, after only a short afternoon of trying, he comes down for dinner. Curriculum: The International Space Station, or ISS, is home to several astronauts at a time, who come and go in small capsules like the Soyuz. At this point, astronauts are even staying for a year at a time to study what happens to humans who live in micro-gravity for extended periods, so we can learn what will happen to us on long space voyages, like a trip to Mars.

"Beep and Boop's Game" - The kids help Dr. Rafferty and Bergs get Mars Rover BOOP over a ravine on the red planet by simulating actions in the DSA "Mars Yard" using BEEP (Boop's sister)! Trial and error leads to success. Along the way, the kids learn just how scientists communicate with far away rovers - through satellites above Mars. The kids then solve a new mystery set up by Bergs, figuring out that Beep and Boop are communicating about... a game of Mars/Mars Yard tic-tac-toe they're playing! Curriculum: A good amount of communication between Mars and Earth goes through satellites. Rovers send images, along with instrument and status data, back to Earth. Extrapolating from the data, the scientists send commands to the rover, which can take 4-24 minutes to be received due to the distance. Rovers are often on their own, carrying out commands and sending image data to overhead satellites. The rover's commanders may tell it to move toward a new rock, grind a rock, analyze a rock, take photos, or gather other data with other instruments."Constellation Prize" - When Mindy thinks she's found her own star, the other kids explain how stars are labeled and identified by constellations. Mindy eventually learns that she hasn't found a new star, but that she CAN create her own version of a constellation by connecting patterns in the sky. Curriculum: A constellation is a group of stars that make an imaginary shape in the night sky. In different parts of the world, people have made up different shapes out of the same groups of bright stars, like a game of connect-the-dots. In the past, constellations were useful for navigating at night and for keeping track of the seasons. They are now useful for identifying parts of the sky astronomers are studying. Because all the stars are at different distances, the constellations would look totally different to inhabitants of another planet orbiting another star.

"Beep and Boop's Game" - The kids help Dr. Rafferty and Bergs get Mars Rover BOOP over a ravine on the red planet by simulating actions in the DSA "Mars Yard" using BEEP (Boop's sister)! Trial and error leads to success. Along the way, the kids learn just how scientists communicate with far away rovers - through satellites above Mars. The kids then solve a new mystery set up by Bergs, figuring out that Beep and Boop are communicating about... a game of Mars/Mars Yard tic-tac-toe they're playing! Curriculum: A good amount of communication between Mars and Earth goes through satellites. Rovers send images, along with instrument and status data, back to Earth. Extrapolating from the data, the scientists send commands to the rover, which can take 4-24 minutes to be received due to the distance. Rovers are often on their own, carrying out commands and sending image data to overhead satellites. The rover's commanders may tell it to move toward a new rock, grind a rock, analyze a rock, take photos, or gather other data with other instruments."Constellation Prize" - When Mindy thinks she's found her own star, the other kids explain how stars are labeled and identified by constellations. Mindy eventually learns that she hasn't found a new star, but that she CAN create her own version of a constellation by connecting patterns in the sky. Curriculum: A constellation is a group of stars that make an imaginary shape in the night sky. In different parts of the world, people have made up different shapes out of the same groups of bright stars, like a game of connect-the-dots. In the past, constellations were useful for navigating at night and for keeping track of the seasons. They are now useful for identifying parts of the sky astronomers are studying. Because all the stars are at different distances, the constellations would look totally different to inhabitants of another planet orbiting another star.

Sydney, Sean, and Mindy help Jet experience his first Halloween. They come up with a list of classic Halloween to-dos, including carving Jack-o-lanterns, dressing up in costumes, and collecting candy. Celery takes the kids on a quick trip to space to see what causes a lunar eclipse. Meanwhile, Mitchell Petersen is on the case to figure out what exactly is going on with that strange Propulsion family... / Sydney, Sean, and Mindy take Jet trick-or-treating, and along the way, they learn about the Red Moon effect from some of the neighborhood scientists. Carrot and Celery turn their garage into a haunted house, which is an unexpected hit with the neighborhood. Jet and Sunspot even make Mindy's Halloween wish come true by flying across the Red Moon as a witch and her cat on a broom.

"What's a Satellite?" - An Earth-orbiting "telecom" communications satellite breaks down, and satellite TV service in Boxwood Terrace stops working. Three people can't watch their favorite shows and consequently get very upset. Jet decides to fly up to space and see what the problem is with the satellite, and hilarity ensues. Curriculum: A satellite is an artificial object that has been intentionally placed into orbit. Satellites are used for a large number of purposes. Communications satellites receive signals from Earth and bounce them back to other locations, for everything from GPS to cell phone service to TV shows. Satellites are usually semi-independent computer-controlled systems."Satellite Selfie" - The kids learn that they can use links to different websites to see a satellite view of their house. Mindy notices that Jet's house is not in the image. That's because these images are from sometime over the past 2 years, and not live images from space. With Dr. Rafferty's help, the kids identify the next time a satellite will pass over their neighborhood, and try to gather for a "space selfie" next to Jet's house. Curriculum: Satellites are objects that humans have placed into orbit around the Earth. Many have cameras in them. Some of these satellite cameras look "up" at the outer areas of space, and some look "down" at the Earth - they can even see our houses and cars!

"What's a Satellite?" - An Earth-orbiting "telecom" communications satellite breaks down, and satellite TV service in Boxwood Terrace stops working. Three people can't watch their favorite shows and consequently get very upset. Jet decides to fly up to space and see what the problem is with the satellite, and hilarity ensues. Curriculum: A satellite is an artificial object that has been intentionally placed into orbit. Satellites are used for a large number of purposes. Communications satellites receive signals from Earth and bounce them back to other locations, for everything from GPS to cell phone service to TV shows. Satellites are usually semi-independent computer-controlled systems."Satellite Selfie" - The kids learn that they can use links to different websites to see a satellite view of their house. Mindy notices that Jet's house is not in the image. That's because these images are from sometime over the past 2 years, and not live images from space. With Dr. Rafferty's help, the kids identify the next time a satellite will pass over their neighborhood, and try to gather for a "space selfie" next to Jet's house. Curriculum: Satellites are objects that humans have placed into orbit around the Earth. Many have cameras in them. Some of these satellite cameras look "up" at the outer areas of space, and some look "down" at the Earth - they can even see our houses and cars!

"Sunday Drive" Parts 1 & 2 - After the Propulsions download their new version of their saucer dashboard operating system, things are out of whack. Their test drive to Mars - usually a simple trip - is complicated by the new dashboard. They zip to Venus and Saturn instead... and then finally land on Mars, so they think. They're actually in an Earth desert, Mars-like at first (hot, red soil, lack of water), but soon they realize where they are. A desert vs. Mars comparison is made. Before heading home, the family decides that the old, dependable saucer operating system works just fine for them. Curriculum: An Earth desert and a Mars desert have some similarities, but are also very different. A comparison is made between the two, including life or lack thereof, temperature, water, and soil.

"Which Moon is Best?" - Sean wants to be the first to walk on a moon, like his hero Neil Armstrong. When Sydney points out that 12 astronauts have already walked on our Moon, Sean thinks that rather than be the 13th to walk on OUR moon, why not be the first to walk on ANOTHER moon in our solar system? Sure, but which moon? The kids decide to compare the frozen moons Europa, which orbits Jupiter, and Enceladus, which orbits Saturn. They get help from Carrot and Celery, who fly them to each one, and Sean gets to walk on them. Curriculum: The gas giants Jupiter and Saturn each have around 60 moons - each of them unique. Interestingly, each gas giant has a frozen ice moon that contains a warmer liquid ocean under the surface: Jupiter's moon Europa, and Saturn's moon Enceladus. Each moon has its own similarities and differences."Detective Mindy" - When Mitchell's mother declares the kitchen counter a "black hole" because she can't find her sunglasses and she's sure she left them there, Mitchell takes up the case of the black hole kitchen counter. As he's investigating, one by one, all the other kids get involved in his process. As they learn about what a black hole really is, Mitchell discovers that science holds enough mysteries to keep him busy for many years. Curriculum: Black holes are strange little holes in space that are like vacuum cleaners that use gravity (instead of suction) to suck things in. A black hole is what remains when a massive star dies. They send out no light and have very strong gravity. Once a planet or star has been sucked into the black hole, it cannot escape, and compresses to a very small size.

"Which Moon is Best?" - Sean wants to be the first to walk on a moon, like his hero Neil Armstrong. When Sydney points out that 12 astronauts have already walked on our Moon, Sean thinks that rather than be the 13th to walk on OUR moon, why not be the first to walk on ANOTHER moon in our solar system? Sure, but which moon? The kids decide to compare the frozen moons Europa, which orbits Jupiter, and Enceladus, which orbits Saturn. They get help from Carrot and Celery, who fly them to each one, and Sean gets to walk on them. Curriculum: The gas giants Jupiter and Saturn each have around 60 moons - each of them unique. Interestingly, each gas giant has a frozen ice moon that contains a warmer liquid ocean under the surface: Jupiter's moon Europa, and Saturn's moon Enceladus. Each moon has its own similarities and differences."Detective Mindy" - When Mitchell's mother declares the kitchen counter a "black hole" because she can't find her sunglasses and she's sure she left them there, Mitchell takes up the case of the black hole kitchen counter. As he's investigating, one by one, all the other kids get involved in his process. As they learn about what a black hole really is, Mitchell discovers that science holds enough mysteries to keep him busy for many years. Curriculum: Black holes are strange little holes in space that are like vacuum cleaners that use gravity (instead of suction) to suck things in. A black hole is what remains when a massive star dies. They send out no light and have very strong gravity. Once a planet or star has been sucked into the black hole, it cannot escape, and compresses to a very small size.

"Tiny Blue Dot" - A rollicking, song-filled recap of the Propulsion family's mission to Earth - as intergalactic travel writers, they really know their way around the Milky Way, and know the difference between a lovely, livable "Goldilocks Planet" like Earth, and the other, way less-livable planets! Curriculum: The Earth is a very rare and wonderful planet in the vastness of space, with its ideal size, its distance from its sun, its breathable atmosphere, liquid oceans, and ability to sustain life."Earth Camping" - Mr. Petersen and Mitchell go camping with Carrot and Jet. The two dads have opposite approaches to setting up tents and preparing food, but when the dads get off track during a hike, the boys help them all find their way back using the compass, and the skills they've learned from their dads (turns out the kids were paying attention all along!). Curriculum: We can find our place outdoors by understanding how to find direction - north, south, east, and west. The Sun rises in the east and sets in the west. A compass uses the Earth's magnetic field to find which way is north (the small magnet inside the compass is drawn by the Earth's magnetism to point to the north pole).

"Space Junk" - After learning about space junk, the kids are determined to help do their part to clean up their "space neighborhood." They meet up with Uncle Zucchini, a long-time galaxy garbage man! Using Bortronian technology, they start a cleanup. During the course of the day, our kids learn that recycling is necessary both on Earth and in space! Curriculum: The outer space region around Earth swarms with millions of pieces of man-made space junk that create potential hazards. Objects as small as 4 inches can be seen by radar or optical telescopes on Earth. Cleaning the debris is a challenge. Trips to larger objects could remove them from orbit, but that's expensive. Another proposal is using lasers to provide a path-changing push that wouldn't damage the object."Scientific Sean" - Jet is fascinated by Earth paper airplanes when he watches Sean casually fold one. Jet suggests that the kids challenge each other to build the plane that will fly the farthest, and still carry the payload of a message. Sean wants to use the Scientific Method to solve the distance/size issues. CURRICULUM: The Scientific Method is a simple set of rules that scientists use the world over, to make sure that they are doing their experiments correctly and in a way that they can repeat. But great science comes from both the application of this simple set of rules AND from imagination and inspiration.

"Space Junk" - After learning about space junk, the kids are determined to help do their part to clean up their "space neighborhood." They meet up with Uncle Zucchini, a long-time galaxy garbage man! Using Bortronian technology, they start a cleanup. During the course of the day, our kids learn that recycling is necessary both on Earth and in space! Curriculum: The outer space region around Earth swarms with millions of pieces of man-made space junk that create potential hazards. Objects as small as 4 inches can be seen by radar or optical telescopes on Earth. Cleaning the debris is a challenge. Trips to larger objects could remove them from orbit, but that's expensive. Another proposal is using lasers to provide a path-changing push that wouldn't damage the object."Scientific Sean" - Jet is fascinated by Earth paper airplanes when he watches Sean casually fold one. Jet suggests that the kids challenge each other to build the plane that will fly the farthest, and still carry the payload of a message. Sean wants to use the Scientific Method to solve the distance/size issues. CURRICULUM: The Scientific Method is a simple set of rules that scientists use the world over, to make sure that they are doing their experiments correctly and in a way that they can repeat. But great science comes from both the application of this simple set of rules AND from imagination and inspiration.

Jet, Sydney, Sean, and Sunspot join Celery as she competes against her brother, Uncle Zucchini, in an "Earthie-style race with a winner"! The race is tight until Celery uses the kids' proposed secret "strategy" - a "gravity assist" off of Jupiter, to increase their saucer speed, and win! / Jet uses his Bortronian skills to test his first experimental Time Machine so he and his Earthie friends can go back to an exact time - 3 minutes earlier - in order to see a spectacular moment in a meteor shower that they missed. A mistake happens the first time, so he keeps trying to go back in time to fix the first mistake, but more mistakes keep happening and snowball into hilarity.

Sydney shows Jet and Sean a cool experiment - dropping different items from the same height to see which reaches the ground first. That reminds Sean of a video he watched of an astronaut on the Moon dropping a hammer and a feather from the same height. They reach the ground at the same time. And the reason is atmosphere - or lack of it - on the Moon. Jet laughs - really? Wait, what's atmosphere? Well, the kids know the best way to find out - into the wagon/saucer! Our kids and Celery fly to the edge of the Earth's atmosphere to learn what it does... and then go to the Moon. Is the atmosphere around the Moon the same as the Earth's? And what happens when our kids do the hammer-feather drop on the lunar surface? / Sydney brings Jet and Sean to the DSA to visit her mom, DR. AMY SKELLEY, and check out her work. Dr. Skelley is a robotics engineer who makes outer space robotic and gadget dreams a reality.

Sydney shows Jet and Sean a cool experiment - dropping different items from the same height to see which reaches the ground first. That reminds Sean of a video he watched of an astronaut on the Moon dropping a hammer and a feather from the same height. They reach the ground at the same time. And the reason is atmosphere - or lack of it - on the Moon. Jet laughs - really? Wait, what's atmosphere? Well, the kids know the best way to find out - into the wagon/saucer! Our kids and Celery fly to the edge of the Earth's atmosphere to learn what it does... and then go to the Moon. Is the atmosphere around the Moon the same as the Earth's? And what happens when our kids do the hammer-feather drop on the lunar surface? / Sydney brings Jet and Sean to the DSA to visit her mom, DR. AMY SKELLEY, and check out her work. Dr. Skelley is a robotics engineer who makes outer space robotic and gadget dreams a reality.

After an afternoon on the Moon, Celery, Jet, and Sunspot discover, as they fly to Earth, that they have mistakenly left Carrot on the Moon! Then the saucer malfunctions and they receive news of a possible solar storm headed their way. In a nail-biter, Jet and Sunspot do a mid-outer space repair job - as per Celery's instructions -with Carrot comically adapting to the Moon environment. In the end, the saucer is fixed, Carrot is rescued, and the solar storm heads in the opposite direction of the Moon. / When a loud thunderstorm hits the neighborhood one evening, the Propulsions are woken up. They gather in the kitchen as the noisy storm rages on, and Jet is too excited to get back to sleep. Carrot, Celery, and Sunspot are sympathetic - they're in the same boat! During the night they all learn about Earth storms as compared to storms on other planets. And then they all try to get Jet to fall back asleep, a seemingly impossible task. They use more and more absurd methods, until Celery has a conventional Earthie solution: sing a lullaby.

It's Mothers Day, and Jet wants to do something special for Celery, who just wants to finish her book. She suggests a day where Jet finds his own missing things. Jet agrees it would be the perfect gift, but first he needs her to fly them to Mars, so he can find his missing robot, Jet 2, that he left there!It's the first windy day of spring at Boxwood Terrace, and the kids are all trying out their new kites - all but Sean, who's stuck in his room with a cold. Sunspot joins Sean and helps him work out engineering problems so he can entertain himself - and even fly a kit from his room!

It's Mothers Day, and Jet wants to do something special for Celery, who just wants to finish her book. She suggests a day where Jet finds his own missing things. Jet agrees it would be the perfect gift, but first he needs her to fly them to Mars, so he can find his missing robot, Jet 2, that he left there!It's the first windy day of spring at Boxwood Terrace, and the kids are all trying out their new kites - all but Sean, who's stuck in his room with a cold. Sunspot joins Sean and helps him work out engineering problems so he can entertain himself - and even fly a kit from his room!

The kids get information from Dr. Rafferty and then travel to outer space to confirm the amazing fact that there is no sound in outer space... even though Jet is convinced he's heard sounds all over the solar system. / After Mindy laments the fact that she's still only 4 and still can't go to space with the other kids, Sydney, Jet, Sean, and Sunspot plan a full makeshift, cobbled together "Day in Space" right there in Jet's yard. Mindy's day ends on a nearby hilltop where they all watch a real, amazing, actual space event - the Leonid Meteor Showers shooting across the sky!

Mindy's mom has gradually been giving Mindy permission to go a little bit farther in the neighborhood on her own, and Mindy is trying to map out exactly what her boundaries are. Sean compares her "Mindyspere" to the helisophere-the boundaries of the Sun's influence. The kids get Celery to fly them out past the heliosphere into true interstellar space. Back on Earth, they make their own Voyager 1 (out of a wagon) and take Mindy to the outermost edges of the Mindysphere! / Sydney knows a lot about Boxwood Terrace's early history, and she tells Jet stories about a local pioneer who went by the nickname "Lone Star." He got that name because he was an early astronomer who liked the hills of Boxwood Terrace for their excellent views of the night sky, and built the first Observatory on the hill that now sits at the center of the Deep Space Array. As Jet imagines Sydney's story of Lone Star, the kids turn the story into a Western-flavored musical.

Mindy's mom has gradually been giving Mindy permission to go a little bit farther in the neighborhood on her own, and Mindy is trying to map out exactly what her boundaries are. Sean compares her "Mindyspere" to the helisophere-the boundaries of the Sun's influence. The kids get Celery to fly them out past the heliosphere into true interstellar space. Back on Earth, they make their own Voyager 1 (out of a wagon) and take Mindy to the outermost edges of the Mindysphere! / Sydney knows a lot about Boxwood Terrace's early history, and she tells Jet stories about a local pioneer who went by the nickname "Lone Star." He got that name because he was an early astronomer who liked the hills of Boxwood Terrace for their excellent views of the night sky, and built the first Observatory on the hill that now sits at the center of the Deep Space Array. As Jet imagines Sydney's story of Lone Star, the kids turn the story into a Western-flavored musical.

Jet is fascinated by the Earthie potatoes that the kids have grown in the backyard garden. Now he wants to try to grow potatoes on Mars! They take several plants to Mars and try, but learn that potatoes need the right air, temperature, water, and even the right soil.Jet is fascinated by his first Earthie rainbow. He wants to know all about them! Sydney tells Jet about the mythical Leprechauns that keep a pot of gold at the end of the rainbow, and even though they explain that it's only a story, Jet insists on following the rainbow to its end and meeting a magical leprechaun.

Sean's nervousness about flying out to visit the remote Neptune is soothed by Jet's suggestion - an improvised, fun "Neptune tune." It works as our kids, Sunspot, and Celery fly to the faraway eighth planet! / When the kids discover that they've missed all 63 of Jet's Bortronian birthdays, they decide to celebrate the one-year anniversary of him landing on Earth instead... with an "Earthday birthday" surprise party!

Sean's nervousness about flying out to visit the remote Neptune is soothed by Jet's suggestion - an improvised, fun "Neptune tune." It works as our kids, Sunspot, and Celery fly to the faraway eighth planet! / When the kids discover that they've missed all 63 of Jet's Bortronian birthdays, they decide to celebrate the one-year anniversary of him landing on Earth instead... with an "Earthday birthday" surprise party!

As the kids get ready for Valentines Day by making their own valentines out of paper, Mindy continues to feel sad that little, frozen Pluto is so far out at the edge of the solar system. When Sydney shows Mindy a newly-downloaded, full-color image of Pluto as seen by the New Horizons spacecraft, Mindy is intrigued by Pluto's "heart" of ice. Mindy once again feels that Pluto deserves our love, since it's no longer considered a planet, but is orbiting out there at the edge of our solar system, like a big frozen Valentine. She asks Sydney to bring her own little hand-made Valentine to Pluto on her behalf. Sydney leads an expedition of the kids to Pluto to bring Mindy's Valentine, experience the frozen dwarf planet themselves, and bring back their report to Mindy. / Sydney is directing the kids in a backyard movie, making her version of a Commander Cressida story about the formation of a star. The other kids all have parts, but Sunspot has the lead - as the star! The kids' movie coincides with the celebration of a star being born near (a.k.a. 10 light years away from) Bortron 7!

Each kid brings their personal project up to the tree house, and each contributes to a huge mess. Now they can't do anything in the tree house because it's too messy, but none of them want to clean up the other's mess. They have to learn to share the responsibility and clean it together.When Mindy tells Jet that clouds are made of cotton candy, and defends this idea because she heard a friend say so, Sean and Sydney set out to show her how to separate fact from fiction through research! Celery takes them up into the clouds to see for themselves.