Hello World
A few facts about the earth:
Earth is the third planet from the Sun and the only astronomical object known to harbor life. According to radiometric dating and other sources of evidence, Earth formed over 4.5 billion years ago.[24][25][26] Earth's gravity interacts with other objects in space, especially the Sun and the Moon, Earth's only natural satellite. Earth orbits around the Sun in 365.26 days, a period known as an Earth year. During this time, Earth rotates about its axis about 366.26 times.[n 5]
About the Earth
- Circumference 40075.017 km equatorial (24901.461 mi)[8]
- Surface area 510072000 km2 (196940000 sq mi)[13][14][n 4]
- Volume 1.08321×1012 km3 (2.59876×1011 cu mi)[3]
- Mass 5.97237×1024 kg (1.31668×1025 lb)[15]
- Satellites 1 natural satellite: the Moon
Top three facts about the Earth
- Escape velocity 11.186 km/s[3] (40270 km/h; 25020 mph)
- Sidereal rotation period 0.99726968 d[18] (23h 56m 4.100s)
- Equatorial rotation velocity 0.4651 km/s[19] (1674.4 km/h; 1040.4 mph)
| Name | Radius | Average Temperature |
|---|---|---|
| Earth | 6378.1 km (3963.2 mi) | 58.7 °F |
| Mars | 3396.2 ± 0.1 km | −82 °F |
| Venus | 6,051.8±1.0 km | 864 °F |