Explanation: The planet Mercury resembles a moon. Mercury's old surface is heavily cratered like many moons. Mercury is larger than most moons but smaller than Jupiter's moon Ganymede and Saturn's moon Titan. Mercury is much denser and more massive than any moon, though, because it is made mostly of iron. In fact, the Earth is the only planet more dense. A visitor to Mercury's surface would see some strange sights. Because Mercury rotates exactly three times every two orbits around the Sun, and because Mercury's orbit is so elliptical, a visitor to Mercury might see the Sun rise, stop in the sky, go back toward the rising horizon, stop again, and then set quickly over the other horizon. From Earth, Mercury's proximity to the Sun cause it to be visible only for a short time just after sunset or just before sunrise.

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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Publikacii s klyuchevymi slovami: Mercury - Solar System - Merkurii - solnechnaya sistema Publikacii so slovami: Mercury - Solar System - Merkurii - solnechnaya sistema
Sm. takzhe: S dobrym utrom, Luna Stranniki Planety Solnechnoi sistemy: naklony i vrashenie Semeinyi portret Solnechnoi sistemy Merkurii s proletayushego apparata "BepiKolombo" Natrievyi hvost Merkuriya Padenie shara v Solnechnoi sisteme Vse publikacii na tu zhe temu >>