Planèt

Mercury

The smallest planet and the closest to the Sun, with the most eccentric planetary orbit.

NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington

The smallest planet, where one day from sunrise to sunrise lasts two whole Mercury years.

Mercury's grey, cratered horizon. — Mercury's cratered limb, seen by NASA's MESSENGER spacecraft. Credit: NASA

Mercury is a rocky world only slightly larger than our Moon. It has almost no atmosphere, so its surface swings between about 430 °C by day and −180 °C at night.

It spins exactly three times for every two orbits around the Sun, so one solar day (sunrise to sunrise) lasts two Mercury years. Its large iron core makes it the second densest planet after Earth.

Eksplore li nan orrery

Fon

Facts kle
Diamèt	4,879 km	[1]
Mass	3.301 × 10²³ kg	[1]
Densite	5.429 g/cm³	[1]
Gravite	3.7 m/s²	Derivasyon nan set done a
Vitès escape	4.25 km/s	Derivasyon nan set done a
Rotasyon (sidereal)	58.6 days	[1]
Tan jou a	176 days	[2]
Orbita	88 days	[3]
Aksyal	0.034°	[2]
Tanperati mwayèn	167°C	[2]
Lune	0	[2]
Distans mwayèn soti nan solèy la (semi- gwo aks)	0.3871 au	[3]

Sètifika yo gratis epi yo pa akredite. Li deklarasyon demisyon an sou kontni edikasyonèl