how big is mercury?

Answer 1

Equatorial radius: 2439.7 km
(0.383 Earths)
Surface area: 7.5×107 km²
(0.147 Earths)
Volume: 6.083×1010 km³
(0.056 Earths)
Mass: 3.302×1023 kg
(0.055 Earths)
Mean density: 5.427 g/cm³
Equatorial surface gravity: 3.701 m/s²
(0.377 g)
Escape velocity: 4.435 km/s
Sidereal rotation period: 58.6462 d (58 d 15.5088 h)
Rotation velocity at equator: 10.892 km/h (at the equator)
Axial tilt: ~0.01°
Right ascension of North pole: 281.01° (18 h 44 min 2 s) 1
Declination: 61.45°
Albedo: 0.10-0.12
Surface temp.:
0°N,0°W
85°N,0°W min mean max
100 K 340 K 700 K
80 K 200 K 380 K


Mercury is the innermost and smallest planet in the solar system, orbiting the Sun once every 88 days. Mercury is similar in appearance to the Moon as it is heavily cratered. It has no natural satellites and no substantial atmosphere. The planet has a large iron core which generates a magnetic field about 1% as strong as that of the Earth. Surface temperatures on Mercury range from about 90 to 700 K (−180 to 430°C), with the subsolar point being the hottest and the bottoms of craters near the poles being the coldest.

Answer 2

Mercury is about 1,4 times larger than our Moon. That makes him look like a relatively small planet (or our Moon look like a relatively large satellite depending on your point of view!). To get an idea, Mercury has a radius of around 2,450 Km.

Answer 3

Mass: 3.302×10^23 kg
Equatorial radius: 2439.7 km

Answer 4

Mercury radious is 2439.7 km.

More details in

http://en.wikipedia.org/wiki/Mercury_%28planet%29

Answer 5

2439.7 km around the equator
mass 3.302×1023 kg

I just looked it up on wikipedia :-) Here's the link.

Answer 6

Mass (Earth=1): 0.0553 (3.302x10^23 kg)