1. If metal touches in space, it will bond and become permanently stuck together.
2. If you could fly a plane to Pluto, the trip would take more than 800 years.
3.The sun's mass takes up 99% of all the mass of the solar system.
4. Light year is a measure of distance, not time. It is the distance that light travels during one Earth year.
5.Life is known to exist only on Earth, but in 1986 NASA found what they thought might be fossils of microscopic living things in a rock from Mars.
**6.Space is completely silent.
**7.The Drake Equation was proposed by astronomer Frank Drake to work out how many civilizations there could be in our galaxy - and the figure is in millions.
8.Scientists recently found what might be the first signs of the big bang.
9.A day in Mercury lasts approximately as long as 59 days on earth.
10 The sunset on Mars appears blue.
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