The kids take a trip to the Moon and learn that falling asteroids probably created all the craters on the Moon's surface!
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.
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.
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.
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.
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!
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.
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.
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!"
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.
The kids learn how all the planets both orbit around the Sun and rotate on their own axes at the same time.
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!
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!
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.
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.
Jet learns what chores are, and he and Sean help Sydney turn her chores into science games!
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.
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!
Mindy is shocked to learn that there is more than one moon in the solar system. Celery flies the kids out to Mars so they can see what its two moons look like compared to ours.
Sean and Sydney take Jet to meet Sean's mom, a scientist, at the Deep Space Array. She explains that they're looking for stars with their own systems of exoplanets to detect if there might be any that contain life. But will taking Jet out in public expose his secret identity?
When Jet and Sydney interrupt Sean doing some training in his backyard, it leads to a pretend mission to Mars.
Sean is trying to work on a science project for Space Troops, but is interrupted by his friends' constant noise.
Celery takes Jet, Sydney and Sean to Saturn to learn what its rings are made of.
Sunspot goes missing
The Propulsions travel to Mars to explore Valles Marineris, which is the largest canyon in the solar system.
Sean and Sydney take Jet to see a show at a planetarium.
Sean sets up a sno-cone stand to help raise money to send a spaceship to Mars. But it's the hottest day of the year and he quickly runs out of ice, and he can't find any nearby. Then Jet has an idea where they can go to get some ice-Saturn's ice moon, Enceladus!
Jet builds a mini-flying saucer in his garage and wants to test it, but to succeed, he has to learn what gravity is and how it works.
Celery's brother, Zucchini, becomes lost while on his way to visit the Propulsions.
A major storm on Saturn is mistaken for a storm on Earth.
Mindy and Carrot want to make desserts that represent the different planets of the solar system for a cooking competition, but can't remember whether Saturn is hot or cold.
Jet builds an electric engine from scratch for the annual soapbox derby competition, but Mitchell, determined to win the derby, is suspicious that Jet is using some alien technology.
Sean's determined to beat his mystery competitor at a video game of "Astro-Tracker." He realizes that the best way to learn about asteroids is to see them for himself.
When Mindy and Sunspot are digging in the yard, they discover a unique rock that Mindy is convinced is a meteorite.
Sean, Sydney, Jet, and Carrot head out to view the Northern Lights. Mindy, upset she can't go, gets a boost - Sunspot stays back and agrees to let her be his pet-sitter.
When the kids realize that they all want to use the treehouse at the same time for different activities, arguments break out.
Mindy spots a possible new comet.
Sean sets up an asteroid watch-station in the treehouse.
When Jet realizes that it’s the anniversary of Carrot and Celery’s first date, he wants to recreate that first picnic they had on one of Bortron 7’s moons. The kids all get involved to help create the perfect date night.
The kids rely on an old Earth computer while FACE 9000 is being upgraded.
Mindy worries about a new addition to her family.
Mindy is excited about showing off her Pluto model at a school show.
The kids and Celery help Sunspot get to Jupiter for his Red Spot Club meeting.
Uncle Zucchini learns about the three states of water (solid, liquid and gas).
Sean wants to be like Neil Armstrong.
Mitchell learns about the "black hole" kitchen counter.
A recap of the Propulsion family's mission to Earth.
Mr. Petersen and Mitchell accompany Carrot and Jet on a camping trip.
In this special half-hour episode, Sydney, Sean and Mindy help Jet experience his first Halloween – from carving Jack-o-lanterns and dressing up in costumes, to trick-or-treating and going to a haunted house. Along the way, the gang learns about lunar eclipses and the Red Moon.
Part 1 of 2. The new version of the saucer dashboard's OS malfunctions.
Conclusion. The new version of the saucer dashboard's OS malfunctions.
The kids learn about the Earth's layers while attempting to dig into the planet's center.
A sweet smell keeps Mindy up at night.
Jet tries to fix a TV satellite.
The kids want to take a "satellite selfie" the next time a satellite passes over their neighborhood.
The kids learn about recycling.
The kids hold a paper airplane contest.
The kids learn how scientists use satellites to communicate between Earth and Mars.
The kids explain to Mindy how stars are labeled and identified by constellations.
The kids and Sunspot attempt to build the tallest tower ever on the moon and are surprised when the moon's surface shakes.
The kids try to train Jet to act less like an alien from outer space.
Mindy's mom gives her permission to venture farther out in the neighborhood.
Sydney tells Jet a story about a Boxwood Terrace pioneer known as Lone Star.
Jet, Sydney, Sean and Sunspot join Celery as she competes against Uncle Zucchini in a race.
Jet tests his first time machine so that he and his pals can go back in time three minutes and catch a spectacular moment in a meteor shower that they missed.
When Jet's parents need to return to their home planet, Sean and Sydney join the Propulsion family for an epic adventure to Bortron 7.
Mindy, Jet, Sean, and Sydney use a solar panel to improve their energy efficiency and notice that Sunspot is acting strange.
NASA's "Year in Space" program on the International Space Station inspires Sean to try to live for a year in the tree house.
A song helps Sean overcomes his nervousness about flying to Neptune.
The kids throw a party for Jet when they learn they missed all 63 of his Bortronian birthdays.
The kids travel to outer space to confirm that there is no sound in there.
The kids create a makeshift "Day in Space" for Mindy as they watch and learn about the Leonid Meteor Showers.
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.
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.
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.
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 has finally turned five and is super excited that she is now old enough to go to space. But she's planned a tea party in the backyard. The kids convince Mindy to move her tea party to the Moon! In her first trip to space ever, Mindy gets to board the Propulsion family saucer and experience space travel, rounding out their Moon tea party with a quick trip out to Pluto and back.
Jet is amazed to find out that the entire Earth doesn't have the same season at the same time. So he flies with Sydney and Sean from the northern hemisphere to the southern hemisphere to compare and experience holidays in winter and summer...all in one day!
Mindy feels bad that she's the smallest kid in the group, so sympathetic Jet and friends use a shrink-ray and become her size. The plan goes awry, and Jet, Sean, Sydney, and Sunspot become the size of mice. Mindy has to follow intricate diagrams to reverse the shrink-ray!
Mindy is impatient for winter, because she wants to ice skate. So Jet, Sean, Sydney, and Celery fly to Saturn's icy rings to gather ice from them and return to build a Saturn-ringed skating rink around Jet's house.
Jet, Sydney, Sean, Mindy, and Sunspot decide to make a scaled replica of the solar system using found items in their own neighborhood and in doing so learn that an Astronomical Unit is the distance from the Earth to the Sun.
While making a cake, Carrot and Mindy find they are one are short one ingredient, so they head to the store. But Carrot accidentally pushes a wrong button on the wagon's newly-updated control panel, and they take off into outer space! Using a diagram, methodical experimentation, and record keeping, Mindy and Carrot figure out how to properly fly the saucer back home, where they finally finish the cake.
Mindy has a problem: now that she's been to space with the bigger kids, she realizes how much there is out there to see! How can she decide where to explore next? Sydney asks her mom, Dr. Skelley, who presents them with the very first edition of Commander Cressida comics! In reading the comic book, Mindy comes to appreciate that she, like Commander Cressida, can explore space "one adventure at a time."
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!
Sean is planning his first sleepout under the stars with his Space Scouts troop, but the weather is threatening and it looks like his sleepout will be rained out. The kids get help from Mitchell, building a weather observation station to make a weather prediction, and visit the DSA for further help by tracking the weather with satellites.
A total eclipse of the Sun is coming to Boxwood Terrace! The kids prepare a Total Eclipse song and dance to perform at the DSA, where the whole town is gathered for the event. Meanwhile, Sunspot attempts to explain the eclipse to all the local animals so they won't think it's night and sleep through it.
Celery has souped-up the family saucer, adding new features for the kids to use, including a robot arm. They test drive it with a trip to the Moon.
Jet takes care of Mitchell's dog Cody for the weekend, and attempts to teach him some new tricks.
When the kids experience an earthquake in Boxwood Terrace, Celery takes them up into space to study the Earth's plates and fault lines from above.
Jet's overactive cousin Zerk comes to Earth for a visit, and the kids show him around the neighborhood.
The kids join Celery in a space race with Uncle Zucchini, Auntie Eggplant and Zerk.
Sydney designs and builds a robot companion for Jet 2.
Jet is fascinated by the effects of wind on his saucer. He and the kids study how wind works, ending with Sean going on a wild saucer ride.
Jet is fascinated by Earthie golf, and Sean and Sydney try to teach him the rules. When the DSA builds a new mini-golf course, the kids team up against the grownups, and Jet gets to apply his new knowledge of force.
Celery takes the kids on a saucer tour all around the Earth to discover all the ways that water can be found. They visit Antarctica to look at the ice, and then compare that extreme to the icy surface of Jupiter's moon Europa.
Sydney wants to enter a Commander Cressida story contest, but can't think up a good enough story. The other kids help, and they come up with a story about lassoing a comet to bring water to Venus, and then Mars.
Jet's robot Jet 2 needs new wheels if he's going to be able to rove over the surface of Mars. Jet and the kids try a bunch of different wheels, without success. In the end, they borrow the wheels from Mitchell's scooter, so Jet 2 can successfully navigate on Mars.
The kids enter their karts in the big kid-kart derby, but this year they all have to design solar powered karts. Jet learns how solar panels work, and how batteries save up the energy so you can race even when clouds cover the Sun.
It's evening at the cul-de-sac, and the kids are looking at two asteroids through Sean's telescope - one is light-colored and one is dark. Meanwhile, Mitchell's dog Cody seems to have run away because he doesn't like the black sweater Mitchell put on him. The kids learn about how, just like asteroids, some things are easier to see in the dark than others, like a white card is easier to see than Cody's black sweater. This amount of brightness is called 'albedo'.
The kids go to their local beach to surf, but notice that the beach looks completely different from the last time they stood there. There's way more sand, and the ocean is far away! They decide to be detectives and study what has happened, and learn that the larger and smaller beach is caused by the tides - the rising and falling of the ocean.
The kids are attempting to grow prize-winning pumpkins in the back yard. Jet gets carried away and uses his Bortronian Grow-Lamp to grow a huge pumpkin. Now they just have to get his enormous pumpkin downtown to win the contest!
The kids decide to compare the mountains of the Earth to those of other planets.
The kids hide some treasure and draw a map to find it.
Mindy spots the face of a man on the moon.
Sydney tells the class the story of the first astronaut, Lone Star.
The kids start a hands-and-eyes investigation when a large, unusual bird shows up in Jet's back yard.
Sean accidentally drops his beloved Neil Armstrong action figure into a large crack in the ground, so the kids all work together to engineer a robotic arm to reach down into the crack and rescue Neil!
When Astronaut Ellen Ochoa comes to visit the DSA and review an engineering project, she runs into the kids, who are running Sean's lemonade stand to raise money for a rocket to Mars. They end up hanging out with her before her DSA meeting.
Astronaut Ellen Ochoa and the kids solve an engineering problem together, which inspires Ellen to use the same solution with the engineering project at the DSA.
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.
The kids do a bunch of projects in the treehouse, but they leave a lot of trash and no one wants to take responsibility for it. They learn to share the responsibility for keeping the treehouse clean.
Mindy tells Jet that clouds are made out of cotton balls. Jet, of course, believes this, but Sean and Sydney don't. Mindy says she learned this from Lillian. The kids go to Dr. Rafferty and Dr. Skelley, who teach them what clouds are really made of and how to find correct information.
It is Carrot's 250th birthday, so the kids make a circus to celebrate. The kids can't do their stunts on Earth because of the high gravity so they move the circus to the moon, where everyone can do their circus tricks due to the low gravity.
On Earth Day, the kids decide to make posters to celebrate. The kids travel around the Earth to find out what makes Earth so special.
The kids play shadow tag but clouds cover the sun, ending their game. The kids learn about a planet with three suns, Proxima B, and travel there see how having three suns affects their shadows.
Sean presents a magic show for the kids (and Carrot). After impressing them with a string of paperclips seemingly held end-to-end by an unseen force, he explains that the trick was done with a magnet he held in his hand. The kids decide to investigate how and when magnets work, and then use their knowledge to put on another magic show for Carrot.
Sunspot is sick and acts weird. This is because of a big Sunspot on the sun. He gets cured when he gets closer to the Sunspot.
Lillian has a sleepover with Mindy planned, but it's too cold to have a sleepover outside.
On Mother's Day, Jet realizes that he left Jet 2 on Mars and he and his friends travel there to recover him.
Sean gets sick on the first windy day of Spring and misses out on kite flying with his friends.
Jet builds a new super saucer that the gang uses to travel to the moon to commemorate the 50th anniversary of the Apollo 11 mission.
Jet and his friends take their skills to Space Camp and go on an intergalactic adventure
