![]() In 1969, astronauts When the Earth passes exactly between the Moon walked on the Moon for the first time. Moon men The Moon The Moon is the only celestial world that Lunar eclipse humans have visited. Between the periods the water As each bulge arrives, bulges, the sea falls and it the sea rises and it is is low tide. These different views are called “phases”. As the Moon, Sun, and Earth move, we see different amounts of the Moon lit by the Sun each night. As the Earth turns, once every 24 hours, different parts of the oceans The Moon moves bulge – the sea’s tides rise and fall. The pull of gravity between the Moon and the Earth tugs on the Earth’s oceans, making them bulge on either side of Orbiting Moon the planet. The far side Ocean bulges can only be seen by spacecraft. This means we always see the same side of the Moon. Scientists think The far side that the Moon The Moon takes the is around same time to turn all the From the Earth, we 4.5 billion way round as it does to only see the near side of the Moon. by meteors crashing into it over millions of years. There Battered surface is no air, and almost no water on the The surface of the Moon is covered Moon, so nothing in craters. 99Įarth and space science The Moon once during each orbit of the Our Moon is a cold, ns As well as craters, Ea dusty world that moves around the The Moon spi there are mountains rth. The Sun is 100 times wider than the Earth! About 4.6 billion years old. Mars Venus Sun Earth Mercury Neptune Uranus Saturn Jupiter How big? All the planets are tiny in comparison with the Sun, but the outer planets are much bigger than the four closest to it. Meteors are lumps of rock that burn up as they enter the Earth’s atmosphere. Comets are chunks of ice, rock, and dust. Earth is the only Fire in the sky planet with an atmosphere that There are many other objects can support life. ![]() Mercury is the Sun smallest planet, and lies closest to the Sun. Days and years are different lengths on different planets. a planet to go all the way round the Sun is a year. The time taken for of ice, dust, and rock. The time each one takes to Saturn has rings made spin once is called a day. Days and years Our solar system All planets spin. ![]()
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