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Astronomy — Our Solar System

Planets, moons, and objects of the solar system

C
cosmictrail_rs 15 terms Nov 24, 2025
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Terms 15

1
Mercury
Closest planet to Sun; no atmosphere; extreme temperature swings
2
Venus
Hottest planet due to greenhouse effect; rotates backward
3
Earth
Third planet; only known planet with life; one natural satellite (Moon)
4
Mars
Red Planet; largest volcano (Olympus Mons); two moons: Phobos and Deimos
5
Jupiter
Largest planet; Great Red Spot; 95 known moons including Ganymede
6
Saturn
Known for its ring system; least dense planet; 146 moons
7
Uranus
Rotates on its side; ice giant; faint rings; 27 moons
8
Neptune
Farthest planet; strongest winds in solar system; moon Triton
9
Pluto
Dwarf planet in Kuiper Belt; reclassified in 2006
10
The Moon
Earth's only natural satellite; causes tides; 384,400 km away
11
Asteroid Belt
Region between Mars and Jupiter containing millions of rocky objects
12
Kuiper Belt
Region beyond Neptune with icy bodies including Pluto and Eris
13
Oort Cloud
Distant spherical shell of icy objects; source of long-period comets
14
Io
Jupiter's volcanic moon; most geologically active body in the solar system
15
Europa
Jupiter's moon with a liquid water ocean beneath its ice shell