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The Size of the

The Size of the. Universe. by The Dark Side. It takes 16 hours to fly from Alaska to Chile in a 747 going 900 km/h. The Earth is a fairly big place. It would take two years to walk it. BUT IT’S NOT AS BIG AS THE SUN.

melinda-rowe
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The Size of the

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  1. The Size of the Universe by The Dark Side

  2. It takes 16 hours to fly from Alaska to Chile in a 747 going 900 km/h. The Earth is a fairly big place It would take two years to walk it.

  3. BUT IT’S NOT AS BIG AS THE SUN

  4. If the Earth were the size of a large sand grain (3 mm across), the sun would be the size of a basketball. Sun Earth The sand grain would be 50 m from the basketball.

  5. Pluto would be 2 km from the basketball.

  6. How far from the basketball would the nearest other star be? • Have a guess!

  7. 14 000 km Pluto might be a long way away, but it is very close compared to even the closest star.

  8. That nearest star is Proxima Centauri. Light travels 300 000 km in one second. A light year is how far light travels in a year. So a light year is about 10 000 000 000 000 km and Proxima Centauri is about 40 000 000 000 000 km away. It is 4 light years from our Sun.

  9. The Sun and Proxima Centauri are two of the 200 billion stars in our galaxy, the Milky Way. The Milky Way is 100 000 light years across.

  10. There are about 100 billion galaxies in the part of the universe we can see. They form clusters, strings and sheets surrounding big empty bubbles up to 200 million light years across. The universe is a bit like an Aero bar.

  11. The most distant galaxies observed are about 40 billion light years away.But there are lots of galaxies beyond them.It is possible that they go on for ever.

  12. The part of the universe we can see is 30000000000000000000000000000000000000000000000000 times as big as the Earth.

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