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What are planets? Astronomy – Space science

By | 2017-08-19T01:34:27+00:00 August 19th, 2017|Physics|

The planet Venus from space For several hundred million years after the Big Bang, there were no planets, only stars. Planets couldn't form until the first stars ran out of fuel and exploded into supernovas, about 14 billion years ago. The supernovas spewed out thousands of tons of carbon, oxygen, iron and other elements into space. Planets are made out of the recycled atoms [...]

Jupiter – Planets – Astronomy

By | 2017-08-18T17:46:33+00:00 August 18th, 2017|Physics|

Jupiter from space Jupiter (named after the Roman god Jupiter) is the next planet further out from our Sun after Mars. But Jupiter is much, much further away from the Sun than Mars is. If the Sun were the size of a penny, then Earth would be about six feet away from the Sun. And Mars would be about ten [...]