Uranus
Venus
Diameterkm
50,724
12,104
Mass (Earth = 1)x
14.54
0.81
Surface Gravitym/s²
8.87
8.87
Mean Temperature°C
-220
+462
Distance from SunAU
19.19
0.72
Orbital Perioddays
30,589
224.7
Day Lengthhours
17.24
2802.00
Known Moons
28
0
Axial Tilt°
97.77
177.36
Orbital Velocitykm/s
6.80
35.02
Quick Facts
Uranus
- -Uranus rotates on its side with an axial tilt of 97.77°, likely caused by a massive ancient collision.
- -Uranus was the first planet discovered with a telescope, found by William Herschel in 1781.
- -All 28 of Uranus's moons are named after characters from Shakespeare and Alexander Pope.
- -Uranus's blue-green color comes from methane in its atmosphere absorbing red light.
Venus
- -Venus spins so slowly that its day (243 Earth days) is longer than its year (225 Earth days).
- -Venus is the hottest planet in the solar system at 462°C, despite Mercury being closer to the Sun.
- -Venus rotates in the opposite direction to most planets, so the Sun rises in the west and sets in the east.
- -The atmospheric pressure on Venus's surface is 92 times that of Earth -- like being 900 meters underwater.