Mindy has to go to bed when the Sun goes down, but she's having such a fun day with her friends. She asks Jet and the others to help her keep the Sun from going down. The older kids humor Mindy and try to help "slow down the Sun." All their efforts make Mindy so sleepy that she decides to go home and sleep. Sydney and Jet are having a hard time explaining to Mindy that the Sun doesn't move - the Earth is moving around the Sun, so the Sun seems to move. Then Sean comes over dressed as his science hero Galileo, getting ready to do a school report. Mindy asks "Galileo" to explain why the Sun seems to move, and Sean practices for his report by explaining how the planets move, in character as Galileo!

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.

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.

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!

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.

Sunspot begins acting strangely, and Jet fears that he is sick. Carrot and Celery examine him, and decide that he's acting strange because of a large sunspot on the Sun. The only way to cure him is to bring him to the Sun, and get him close to the huge sunspot. Mindy wants to have a sleepover outside with her friend Lillian, but it's winter and too cold to sleep outside under the stars. Sean points out that they are under the light of a star all the time - our Sun! Mindy learns that our Sun is a star, just like the tiny ones we see at night.

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!

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!

The kids and Sunspot attempt to build the tallest tower ever on the Moon, hoping to beat Jet's cousin's record. While building, the Moon's surface shakes. Huh? The Earth kids are amazed to learn that the Moon has quakes, and Jet is just as amazed to learn that Earthquakes exist. After learning about the causes of moonquakes, the kids attempt to build a Moonquake-proof structure. / Sean and Sydney are planning to take Jet to the DSA Open House the upcoming weekend. The Earth kids are nervous that he will get in front of a crowd of strangers and forget to keep the secret that he's an alien from Bortron 7. After a hilarious outburst from Jet, the kids are motivated to try to "train" him to behave less like an alien from outer space, and more like a "regular Earthie kid." Jet's doing well until he ends up using his Bortronian jet-pack to fly up to rescue the DSA weather balloon when it's about to get away in some bad weather.

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.

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.

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.

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.

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.

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!

"Round and Round" -The kids learn how all the planets both orbit around the Sun and rotate on their own axes at the same time. Curriculum: The planets both revolve around the sun and rotate on their axis. "The Plant From Bortron 7" - Jet attempts to grow a seed from his home planet, but the light from our Sun is stronger than the light from Bortron 7, and has a surprising effect on the plant! Curriculum: There are different kinds of stars, which emit different kinds of light.

"Round and Round" -The kids learn how all the planets both orbit around the Sun and rotate on their own axes at the same time. Curriculum: The planets both revolve around the sun and rotate on their axis. "The Plant From Bortron 7" - Jet attempts to grow a seed from his home planet, but the light from our Sun is stronger than the light from Bortron 7, and has a surprising effect on the plant! Curriculum: There are different kinds of stars, which emit different kinds of light.

How Come the Moon Has Craters - The kids take a trip to the Moon and learn that falling asteroids probably created all the craters on the Moon's surface! Curriculum: Craters on the Moon were probably caused by asteroids hitting the surface. Backyard Moon Base - Led by Sydney, the kids build a moon base in Jet's backyard and use their imaginations to figure out what challenges they would need to overcome in order to live on the Moon. Curriculum: A moon habitat is a structure on the Moon that would provide the right conditions to allow humans to live on the Moon's surface.

"Mission to the Moon" - Sean tells Jet, Sydney, and Mindy about the Apollo 11 mission, and the kids decide to do a real-life reenactment of man's first mission landing on the Moon! Curriculum: The first manned mission to the Moon took place on July 20, 1969, and the first two humans on the Moon were Neil Armstrong and Buzz Aldrin. The astronauts were launched from a Saturn V rocket on the Apollo 11 mission. "Mindy's Moon Bounce House" - Jet gives a special birthday gift to Mindy that allows her to defy gravity. She has so much fun hovering above everyone, the others have to convince her to come back to Earth in time for her party. Curriculum: Gravity is a natural phenomenon by which all physical bodies attract one another. Gravity gives weight to physical objects and causes them to fall towards the ground when dropped.

"Mission to the Moon" - Sean tells Jet, Sydney, and Mindy about the Apollo 11 mission, and the kids decide to do a real-life reenactment of man's first mission landing on the Moon! Curriculum: The first manned mission to the Moon took place on July 20, 1969, and the first two humans on the Moon were Neil Armstrong and Buzz Aldrin. The astronauts were launched from a Saturn V rocket on the Apollo 11 mission. "Mindy's Moon Bounce House" - Jet gives a special birthday gift to Mindy that allows her to defy gravity. She has so much fun hovering above everyone, the others have to convince her to come back to Earth in time for her party. Curriculum: Gravity is a natural phenomenon by which all physical bodies attract one another. Gravity gives weight to physical objects and causes them to fall towards the ground when dropped.

"Tour of the Solar System" - Jet attempts to play the "Solar System" game with Sean, Sydney, and Mindy, but the kids don't quite understand which planets go where. Celery, Jet's mom, takes them on a tour of the solar system and introduces each of the eight planets. Curriculum: The sun is at the center of our solar system, and everything else revolves around it. The sun, planets, dwarf planets, moons, and different kinds of space rocks like asteroids and comets are all part of our solar system. "Jet Cooks Dinner" - Sydney, Mindy, Sunspot, and Sean help Jet cook a classic meal from Bortron 7 for his parents, Celery and Carrot. After some funny attempts, the kids find that using the Scientific Method works best to get the meal done in time. Curriculum: "Failure is not the opposite of success; failure is a stepping stone to success." This attitude can be applied to cooking as well as scientific discoveries!

"How We Found Your Sun" - Jet explains how his family, the Propulsions, found Earth by way of the Sun, a star in the Milky Way galaxy. Celery takes the kids out into space and shows them how the Sun looks huge, or small like other stars, depending on your perspective. Curriculum: The sun is a star. Our sun is a star in the Milky Way galaxy, a yellow dwarf. The Propulsion family comes from another star in our galaxy: Bortron, a smaller, cooler red dwarf star. "Treehouse Observatory" - Sydney, Jet, Sunspot, and Sean fix up a treehouse and make it into their own clubhouse/observatory. The kids even build their own telescope so they can all observe the awesome nighttime sky! Curriculum: An observatory is a location used for observing terrestrial or celestial events. A telescope is an instrument that aids in the observation of remote objects by collecting electromagnetic radiation (such as visible light).

"How We Found Your Sun" - Jet explains how his family, the Propulsions, found Earth by way of the Sun, a star in the Milky Way galaxy. Celery takes the kids out into space and shows them how the Sun looks huge, or small like other stars, depending on your perspective. Curriculum: The sun is a star. Our sun is a star in the Milky Way galaxy, a yellow dwarf. The Propulsion family comes from another star in our galaxy: Bortron, a smaller, cooler red dwarf star. "Treehouse Observatory" - Sydney, Jet, Sunspot, and Sean fix up a treehouse and make it into their own clubhouse/observatory. The kids even build their own telescope so they can all observe the awesome nighttime sky! Curriculum: An observatory is a location used for observing terrestrial or celestial events. A telescope is an instrument that aids in the observation of remote objects by collecting electromagnetic radiation (such as visible light).

"A Kid's Guide to Mars" - Celery and Carrot need to update their guidebook about Mars, and the kids join them on a trip to see how much things have changed on Mars in the last four billion years. Curriculum: Mars was once (4 billion years ago) a lot like Earth, with oceans, clouds and drinkable water. Something happened 3.7 billion years ago that turned Mars' atmosphere from warm and wet to dry and cold. "Jet 2" - Jet builds a robot version of himself, so that he can be in "two places at once!" But Jet learns what jealousy is when the other kids seem to be having more fun with Jet 2 than they are with him! Curriculum: A robot is an automatic mechanical device often resembling a human or animal. Humans build robots to perform the tasks humans can't do, but people are still in control because they give instructions to the robots.

"Just the Right Distance From the Sun" - Sean explains to the others that Earth is a "Goldilocks" planet because it's not too hot and not too cold. When Celery takes the kids to space, they observe how the other planets don't have the right attributes to support life, but Earth is "just right"! Curriculum: All life on Earth comes from the energy of the Sun. The Earth happens to be located just the right distance from the Sun: not too far away, and not too close. This makes the Earth what we call a "Goldilocks planet": not too hot, not too cold. "Solar Power Rover" - Jet, Sean, and Sydney visit their Mars Robot Rover friend at the DSA, and discover that the rover seems tired. Through helping the solar powered robot regain its energy, they learn how energy can be captured, used from the Sun, and used anywhere - even on Mars. Curriculum: The Sun creates solar power that is used for energy. Solar power is the conversion of sunlight into electricity, either directly or indirectly.

"Just the Right Distance From the Sun" - Sean explains to the others that Earth is a "Goldilocks" planet because it's not too hot and not too cold. When Celery takes the kids to space, they observe how the other planets don't have the right attributes to support life, but Earth is "just right"! Curriculum: All life on Earth comes from the energy of the Sun. The Earth happens to be located just the right distance from the Sun: not too far away, and not too close. This makes the Earth what we call a "Goldilocks planet": not too hot, not too cold. "Solar Power Rover" - Jet, Sean, and Sydney visit their Mars Robot Rover friend at the DSA, and discover that the rover seems tired. Through helping the solar powered robot regain its energy, they learn how energy can be captured, used from the Sun, and used anywhere - even on Mars. Curriculum: The Sun creates solar power that is used for energy. Solar power is the conversion of sunlight into electricity, either directly or indirectly.

How Come the Moon Changes Shape? - When Jet, Sydney, and Sean have a hard time trying to explain the phases of the Moon to Mindy, Jet's parents, Celery and Carrot, offer to fly them out to space so they can see how the Moon changes shape depending on perspective. Curriculum: The Moon changes shape depending on its position relative to the Earth and Sun. Night of a Bazillion Stars - Jet, Sydney, and Sean decide to have a sleepover in Jet's backyard. They use Sean's telescope to look at the night sky and learn why stars twinkle and planets don't. Curriculum: Star and planet gazing. Stars twinkle because of turbulence in the atmosphere of the Earth. Planets do not twinkle the way stars do.

"Beep Has the Blues" - Beep is sad because her sister rover on Mars, Boop, is sick and can't move. Celery flies the kids out to Mars to try to help and discover the problem - that Boop's solar panels have been covered in dust. Curriculum: A planetary rover is a space exploration vehicle designed to move across the surface of a planet or other celestial body. "Chore Day" - Jet learns what chores are, and he and Sean help Sydney turn her chores into science games! Curriculum: Force is any interaction that tends to change the motion of an object. Force can also be explained as a push or pull.

"Beep Has the Blues" - Beep is sad because her sister rover on Mars, Boop, is sick and can't move. Celery flies the kids out to Mars to try to help and discover the problem - that Boop's solar panels have been covered in dust. Curriculum: A planetary rover is a space exploration vehicle designed to move across the surface of a planet or other celestial body. "Chore Day" - Jet learns what chores are, and he and Sean help Sydney turn her chores into science games! Curriculum: Force is any interaction that tends to change the motion of an object. Force can also be explained as a push or pull.