Astronomy   View all facts   Glossary   Help

physical object > natural object > celestial body > planet > naked eye planet > Mars

Mars
subject			fact

Mars	has atmospheric pressure 3.5 millibars (data from mariner 7)
	has obliquity 23°59'
	has core composition liquid Ni - Fe
	has atmosphere composition more than 90% CO2, traces of O2, CO, H2O.
	has albedo 0.16
	has synodic period 779.9 days
	has oblateness 0.0092
	has surface temperature 248 K
	has inclination i = 1°.85
	has eccentricity e = 0.0934
	has surface gravity 0.38 that of Earth
	has escape velocity 5.1 km s-1
	has mean density 4.0 g cm-3
	has number of satellites 2
	has rotational period 24h37m22s.6
	has mean orbital velocity 24.2 km s-1
	has mean distance from sun 1.5237 AU
	has radius (1974) 3394 km -has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press
	has mass 6.45 × 1026< sup> g (0.11 MEarth)
	is a part of our solar system
	has definition Fourth major planet out from the Sun. Its tiny satellites are locked in synchronous rotation with mars.
	is an instance of terrestrial planet
	is an instance of naked eye planet
	is an instance of superior planet
	has sidereal period 687 days
naked eye planet	has motion relative to stars epicycloidal
	has been observed for many centuries
	has apparent magnitude brighter than 5
terrestrial planet	has composition mostly made of heavier non-volatile elements
	has material silicates, oxides, water
planet	is a part of solar system
	has orbit
	has mass greater than Pluto's mass and less massive than ten times Jupiter's mass
celestial body	has spectra
physical object	has location or center of gravity
	has angular momentum
	has velocity
	has momentum
	has temperature
	has volume
	has extent

Next naked eye planet: Saturn    Up: naked eye planet, superior planet, terrestrial planet    Previous naked eye planet: Jupiter