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"Tour of the Solar System": Jet and his friends are playing a Solar System game but mess up on which planets go where, so they take a trip to space to find out the order of the planets in the Solar System.

"Song": Solar System Song
"Jet Cooks Dinner": While Jet's parents are away, he and his friends decide to cook the "classic 3-part Bortronian meal" for them, but they have trouble with the cooking. Sean teaches them the Scientific Method so they can get the recipe right.

"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.

"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.

"Just the Right Distance from the Sun": Sean explains to the group that Earth is a Goldilocks planet: It's not too hot and not too cold, it's just right. When Celery flies the kids out into space, they observe how other planets don't have the attributes to support life.
"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.

"Learning Goals": 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 a "Goldilocks planet": not too hot, not too cold.

"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.

"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.

"Earth Mission to 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.

"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.

"More Than One Moon": 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.

"Mission to Mars": When Jet and Sydney interrupt Sean doing some training in his backyard to eventually lead a mission to Mars, Jet suggests they just have his mom fly them out to Mars. Is Sean’s concern about Martian dust devils legitimate?

"What's Up With Saturn's Rings?": Celery takes Jet, Sydney, and Sean on a trip to explore Saturn’s rings to learn what they’re made of.

"The Grandest Canyon": When the Propulsions are forced to watch a slide show of the Petersons' vacation to the Grand Canyon, they’re inspired to take their own trip to Mars to explore Valles Marineris—the largest canyon in the Solar System!

"A Visit from Uncle Zucchini": Celery’s brother, Zucchini, and his pet, Moonbeam, decide to visit the Propulsions, but get lost along the way. The kids have to figure out where on Earth he is. As it turns out, Uncle Zucchini never made it to Earth, but has landed on a place that sort of resembles Earth – Titan, Saturn’s largest moon! Titan has Earth-like features such as oceans, mountains, and an atmosphere.

"Ice Moon Enceladus": 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!

"Solar System Bake Off!": Mindy and Carrot are entering a cooking competition and are making desserts representing the different planets of the Solar System. But they hit a bump when they can’t remember if Saturn is cold on the inside and hot on the outside… or the other way around. Jet, Sydney, and Sean fly with Celery out to Saturn to find out before the competition begins, so Mindy and Carrot can finish their entry in time.

"Asteroids, Meteors, and Meteorites": Sean is determined to beat his mystery competitor at a video game of "Astro-Tracker." When Face 9000 tells the kids about the Asteroid Belt, Sean realizes that the best way to learn about asteroids is to see them for himself. Celery flies them out to space, and the kids learn the difference between an asteroid, a meteor, and a meteorite. Worried at first, Sean learns that only the rare asteroid (called a meteorite) makes it all the way to Earth, so he decides that he’ll become really good at "Astro-Tracker" to prepare for the future when he can be on a team of scientists who track rogue asteroids.

"Comet Fever": The neighborhood is having a star gazing party when Mindy discovers what may be a new comet. While Celery takes Jet, Sean, and Sydney out to space to get a close-up look at the comet, Carrot and Mindy decide to surprise the others and make their very own comet in the backyard using ingredients from home.

"Mindy Pet-sits": 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. As the group in the saucer searches for, yet can’t find, the Northern Lights, Sunspot and Mindy work on a backyard project – making their own backyard "Northern Lights" display.

"Date Night": 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.

"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.

"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 Great 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.

"Diggin' Earth": The kids try to dig into the Center of the Earth (a la Commander Cressida), but after finding out that the center is much too hot and the layer of Earth leading up to it is solid rock, they re-vamp their plans. They decide to become the kids to dig down the deepest into the Earth. Learning about the layers of the Earth inspires Jet to make an Earth Layer Cake.

"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 the Moon, Sean thinks that rather than be the 13th to walk on the Moon, why not be the first to walk on ANOTHER moon in the 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.

"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!

"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.

"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!

"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!

"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.

"Whole Lotta Shakin": 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.

"From Pluto with Love": 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 the 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.

"The Mindysphere": 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 'Mindysphere' 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!

"Space Race": 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!

"Sean's Neptune Tune": 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!

"Castaway Carrot": 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.

"Not a Sound": 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.

"A Hammer and a Feather": 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 the kids do the hammer-feather drop on the lunar surface?

"Endless Summer": 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's Ice Rink": 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.

"Mindy and Carrot Bake": 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's Bedtime": 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.

"Eye in the Sky": 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.

"Souped-Up Saucer": 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.

"I Feel the Earth Move": 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.

"Asteroid Belt Space Race": The kids join Celery in a space race with Uncle Zucchini, Auntie Eggplant and Zerk.

"Earth Wind & Flyer": 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.

"Water, Water Everywhere": 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.

"Try and Try Again": 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.

"You Can Call Me Albedo": 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'.

"Freebird": Some snow geese start to invade Jet's backyard. Jet and the gang are confused at first, but eventually learn that they are using the backyard as a stopping place while they migrate.

"Ain't No Mars Mountain High Enough": Sunspot wants to join an elite society called the Space Summit Society, so he needs to climb Mount Sharp, on Mars. The other kids accompany him on his quest to climb Mt. Sharp. At first, he rejects help from them, but he eventually learns the value of working together.

"Moon Face": Mindy thinks there's a face on the moon. The kids investigate to see what causes the 'face' on the moon.

"Potatoes on Mars": 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.

"Who Messed Up the Treehouse?": The kids do a bunch of projects in the treehouse. Sean makes paper airplanes, Jet has a picnic with Sunspot, Sydney makes Commander Cressida comics, and Mindy makes a puppet show. However, they leave a lot of trash there. No one wants to take responsibility for it. They try to find other places to play, but they don't work out. In the end, they learn to share the responsibility and keep the treehouse clean.

"Moon Circus": It is Carrot's 250th birthday. The kids make a circus to celebrate. They tell Jet not to tell Carrot, but Carrot ends up finding out anyway. The kids can't do their stunts on Earth because of the high gravity, and Carrot strains his back while trying to do a famous flip of this. In the end, the decision is made to transfer the circus to the Moon, where everyone can do their circus tricks due to the low gravity.

"My Three Suns": The kids play shadow tag, but then the clouds cover the sun, making it so that they can't play shadow tag. Then, the kids learn about a planet with 3 suns, Proxima B. They are glad to live on a planet with just one sun. Meanwhile, Face 9000 tries to take up comedy.

"Sunspot's Sunspot": 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.

"Mars Rock for Mom": On Mother's Day, Jet realizes that he left Jet 2 on Mars and he and his friends travel there to recover him.