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Mercury | Send-To | Print | More
Category: Astronomy | 1855 views
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© USGS Astrogeology Research Program
Radius: 2439.7 km
Mass: 3.3x1023 kg
Orbital Period: 87.97 Earth days
Rotation Period: 58.65 Earth day
Distance from Sun: 57.91 million km
Mercury is the closest planet to the Sun.
Additional notice by the Author: The presented information is considered public information and may be distributed or copied. Use of appropriate byline/photo/image credit is requested.
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Mercury is the first planet from Sun:Distance from sun (million km): 58
Revolution: 88 days
Diameter (equator): 4.878 km
Period of rotation: 58 days, 15 h Mercury is smaller than any other planet except Pluto and is the closest planet to the Sun. This factor contribute to the fact that the surface of Mercury has the greatest temperature range of any planet in our solar system: the surface temperature on the day side of Mercury reaches 427 degrees Celsius. On the night side, the temperature drops to -183 degrees Celsius. The surface of Mercury has been shaped by three processes: meteorite impacts, volcanism where lava flooded the surface, and tectonic activity. Mercury has no moons or other naturally occurring satellites.
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| Available Images | Mercury: Outgoing Hemisphere
© NASA Jet Propulsion Laboratory
This mosaic shows the planet Mercury as seen by Mariner 10 as it sped away from the planet on March 29, 1974. The mosaic was made from over 140 individual TV frames taken about two hours after encounter, at a range of 37,300 miles (60,000 kilometers). North is at top. The limb is at right, as is the illuminating sunlight. The equator crosses the planet about two-thirds of the way from the top of the disc. The terminator, line-separating day from night, is about 190 degrees west longitude. The planet shows a gibbous disc-more than half-illuminated. This hemisphere is dominated by smooth plains, rather than heavily cratered terrain, and resembles portions of the Moon's maria in general shape. Half of a very large, multi-ringed basin named Caloris Basin appears near the center of the disc near the terminator. Its surrounding mountain ring is 800 miles (1,300 kilometers) in diameter.
More images:
 Mercury: Caloris Basin
Mercury: First Encounter Closest Approach
Mercury: Inbound View
Mercury: Intercrater Plains And Heavily Cratered Terrain
Mercury: Large Circular Basin
Mercury: Long Scarp
Mercury: Old Basin Filled By Smooth Plains
Mercury: Outbound View
Mercury: Outgoing Hemisphere
Mercury: Small Craters Engulfed By Smooth Plains
Mercury: South Pole
Mercury: Southern Hemisphere
Mercury: Terraced Craters
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