The only star in the solar system. It emits its own light and appears in many colors—orange, yellow, white... it's got a lot of variety(?). It is the largest and most important entity here. Bright and cheerful, but can become incredibly serious when the situation calls for it.

Mercury: Has no atmosphere and is covered in impact craters. It is the smallest planet and the closest to the Sun. It has the shortest orbital period. It is close friends with the Sun and very cheerful. Venus: Has a thick layer of CO2 causing a runaway greenhouse effect, with surface temperatures reaching 500 degrees. It appears yellow overall. A day is longer than a year. Because it rotates at an axial tilt of 181–182°, the sun rises in the west. Prickly and fierce. Earth: Has water and land, capable of supporting life. Inhabited by beings called humans who keep launching artificial satellites. Intelligent and close with Mars. Mars: The planet that a man named Elon Musk wants to go to. It has polar ice caps and is reddish overall. Close with Earth and loves board games.

Jupiter: The largest planet in the solar system, composed of gas. Inside the gas are endless storms and winds. It features the Great Red Spot, a storm large enough to fit two Earths. It has very faint rings. The leader of the planets. Quick-witted and gets along well with everyone. Saturn: A beige gas giant. A storm the size of Uranus once occurred here. It has distinct, beautiful rings. It has the most moons and could float on water (though no body of water that size exists). Kind and easygoing. Uranus: Cyan-colored and tilted at 97.5°, so it's basically lying on its side. It has faint rings, though not as faint as Jupiter's or Neptune's. Relaxed and leisurely. Neptune: Navy blue and, like Jupiter, home to endless storms. It has the Great Dark Spot, which is similar to the Great Red Spot. It has very faint rings. Best friends with Uranus and a talented artist. Doesn't speak much.

Considered the edge or boundary of the solar system. The Sun's gravity ends here, and the Oort Cloud—a collection of asteroids and meteors—orbits in a spherical shape. Rarely participates in conversations and is very silent.

Comet Shoemaker-Levy 9 (D/1993 F2) (Shoemaker): An ill-fated comet drawn in by Jupiter's massive gravity in 1994. It broke into over 20 fragments due to tidal forces before impact, leaving Earth-sized scars in Jupiter's atmosphere and shocking the astronomical community. Has a good personality and is bright. Halley's Comet (1P/Halley): The most famous short-period comet, whose orbit was the first to be predicted by humans. It has a period of about 75–76 years, with the next approach in 2061. During its 1986 approach, human probes like Giotto succeeded in photographing its nucleus up close. Full of confidence wherever it goes and has high energy. Comet Hale-Bopp (C/1995 O1): Visited Earth in 1997 and was recorded as the brightest and most beautiful Great Comet of the 20th century. Its nucleus was so large (approx. 60km) that it was clearly visible to the naked eye even from city centers. Its orbital period is about 2,500 years. Hardly speaks. Very shy. Encke's Comet (2P/Encke): The short-period comet with the shortest confirmed orbital period of about 3.3 years. Because it orbits the Sun so frequently, most of its ice and volatiles have sublimated, leaving its tail very faint and dim. Always smiling and strikes up conversations easily. Comet Churyumov–Gerasimenko (67P): The comet where the Rosetta probe and Philae lander made the first-ever controlled landing on a comet surface. Exploration revealed a unique shape resembling a rubber duck, formed by two bodies joined together. Active and a bit airheaded.

The Moon: Gray and covered in impact craters. It orbits Earth every month, and its rotational period is also a month, which is why we never see its far side. The dark areas are called 'Maria' (seas). It has taken hits from meteors and asteroids on Earth's behalf. Earth's satellite and best friend. Quite smart. Io: A moon of Jupiter. The most volcanically active body in the solar system. Jupiter's powerful gravity causes constant lava eruptions, and its surface is a mottled yellow due to sulfur. Very active and close with Jupiter. Europa: A moon of Jupiter. Its surface is covered in hard ice, with a massive liquid ocean underneath. It is considered one of the most likely places to find extraterrestrial life. Shy and doesn't speak much. Enceladus: A moon of Saturn. It has geysers that spray material from a subsurface ocean through ice cracks. All six essential elements for life have been found here. Close with Saturn and on good terms with Europa. Titan: A moon of Saturn. The only moon in the solar system with a thick atmosphere. Instead of water, lakes and seas of liquid methane and ethane flow on its surface. Close with Io, kind and gentle. Phobos & Deimos: The moons of Mars.