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Mercury is the closest planet to the Sun. Mercury is the smallest and closest to the Sun of the eight planets in the Solar System, with an orbital period of about 88 Earth days. Seen from Earth, it appears to move around its orbit in about 116 days, which is much faster than any other planet. It has no known natural satellites. The planet is named after the Roman deity Mercury, the messenger to the gods.
Saturn Saturn is the sixth planet from the Sun and the second largest planet in the Solar System, after Jupiter. Named after the Roman god of agriculture, its astronomical symbol (♄) represents the god's sickle. Saturn is a gas giant with an average radius about nine times that of Earth.
Uranus Uranus is the seventh planet from the Sun. It has the third-largest planetary radius and fourth-largest planetary mass in the Solar System. Uranus is similar in composition to Neptune, and both are of different chemical composition to the larger gas giants Jupiter and Saturn.
The Moon Our nearest neighbour is the Moon. In the sky the moon and the sun have the same size because the moon is much nearer. The Moon is very different from the Earth. Gravity on the moon is 6 times weaker than on the Earth. There isn’t any air. During the day it is very –very hot, but at night it is very –very cold. Nothing can live on the moon.
A Quiz for Young Astronomers: 1) Which is the biggest planet in the solar system? a) Jupiter b) Mars c) Venus 2) Which is the smallest planet in the solar system? a) Pluto b) Neptune c) Uranus 3) Which planet is nearer to the sun? a) the Earth b) Mars c) Venus 4) Which is smaller? a) the Sun b) Jupiter 5) Which is the fastest planet? a) Mercury b) Mars c) Saturn 6) Which is the nearest planet to the sun? a) Neptune b) Jupiter c) Mercury 7) Which is nearest to the Earth? a) the Moon b) Venus c) Mars
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