Planet

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.

Nwalee ya n'ime ngwe

Ebe data

Ihe mere
Diamita	4,879 km	[1]
Ụdị	3.301 × 10²³ kg	[1]
Mgbatị	5.429 g/cm³	[1]
Nhazi	3.7 m/s²	Ébūbàrà site na dataset
Nhazi	4.25 km/s	Ébūbàrà site na dataset
Omenchọgharị	58.6 Ọtụtụ Ubochi	[1]
Oge ụbọchị	176 Ọtụtụ Ubochi	[2]
Óbīèlụ̀	88 Ọtụtụ Ubochi	[3]
Axial tilt	0.034°	[2]
Nhazi okpomọkụ	167°C	[2]
Mọnde ndị a ma ama	0	[2]
Oge n'etiti site na Sun (semi-major axis)	0.3871 au	[3]

Ngwaọrụ na agụụ na-eji móòdù akọwapụtara maka ịmụ naanị. Ha gaghị eji ha maka nlegharị anya, mmepe ọrụ mọọbụ nhọrọ ọbụla nke ọrụ. Saịtịapụl bụ n'efu ma ọ bụghị n'aka. Gụọ n'ihe ọmụmụ ihe ndị ahụ