Venus
Neptune
Diameterkm
12,104
49,528
Mass (Earth = 1)x
0.81
17.15
Surface Gravitym/s²
8.87
11.15
Mean Temperature°C
+462
-214
Distance from SunAU
0.72
30.07
Orbital Perioddays
224.7
59,800
Day Lengthhours
2802.00
16.11
Known Moons
0
16
Axial Tilt°
177.36
28.32
Orbital Velocitykm/s
35.02
5.43
Quick Facts
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.
Neptune
- -Neptune has the strongest winds in the solar system, reaching speeds of up to 2,100 km/h.
- -Neptune was the first planet discovered through mathematical prediction rather than observation.
- -One year on Neptune lasts about 165 Earth years -- it has completed just one orbit since its discovery in 1846.
- -Neptune's moon Triton orbits backward (retrograde), suggesting it was captured from the Kuiper Belt.