Venus is the second planet from the Sun, orbiting it every 224.7 Earth days. It has no natural satellite. It isRoman goddess of love and beauty. After the Moon, it is the brightest natural object in the night sky, reaching an apparent magnitude of −4.6, bright enough to cast shadows. Because Venus is an inferior planet from Earth, it never appears to venture far from the Sun: its elongation reaches a maximum of 47.8°.
Venus is a terrestrial planet
and is sometimes called Earth's "sister planet" because of their
similar size, gravity, and bulk composition (Venus is both the closest
planet to Earth and the planet closest in size to Earth). However, it
has also been shown to be radically different from Earth in other
respects. It has the densest atmosphere of the four terrestrial planets, consisting of more than 96% carbon dioxide. The atmospheric pressure
at the planet's surface is 92 times that of Earth's. With a mean
surface temperature of 735 K (462 °C; 863 °F), Venus is by far the
hottest planet in the Solar System. It has no carbon cycle
to lock carbon back into rocks and surface features, nor does it seem
to have any organic life to absorb it in biomass. Venus is shrouded by
an opaque layer of highly reflective clouds of sulfuric acid, preventing its surface from being seen from space in visible light. Venus may have possessed oceans in the past,[13][14] but these would have vaporized as the temperature rose due to a runaway greenhouse effect. The water has most probably photodissociated, and, because of the lack of a planetary magnetic field, the free hydrogen has been swept into interplanetary space by the solar wind. Venus's surface is a dry desertscape interspersed with slab-like rocks and periodically refreshed by volcanism.
Venus
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