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Answers to Readers' Questions on General Topics - Astronomy. Also refer to physical science, telescopes, space, earth, moon, sun, galaxy, milky way, universe, black hole, big bang, mars, venus, jupiter, gravity, scientific instruments, Ron Kurtus, School for Champions. Copyright © Restrictions

Answers to Readers' Questions on General Topics

The following 4 questions have been answered. They are listed according to date.

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Can someone in the U.S. see the same contellations as me?

Question

February 16, 2010

will a friend in the US be able to see the same constellation that you have viewed?

ronalie - Philippines

19227

Answer

You should be able most of the constellations as a person in the U.S. Someone in the extreme northern states in the U.S. might see a few that you cannot see.

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Fascination with astronomy

Question

January 9, 2010

astronomy introduction and its fascination

vani - Trinidad

19008

Answer

Astronomy truly is fascinating. Feel free to go through all our lessons to help your own fascination.

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Was Valentina Tereshkova the first woman in space?

Question

January 4, 2010

is it true that valentina tereshcova is the first woman in space.

marlon - Phillipines

18964

Answer

Russian cosmonaut, Valentina Tereshkova was the first woman in space. She was selected to pilot Vostok 6 on 16 June 1963.

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Would someone ten light years away see a light?

Question

July 28, 2009

If i were to turn on a light on earth and turn it back off in theory that light goes of forever correct ? Because say someone ten light years away wont see it for ten light years and so on far any distance,so once lit it shines forever. Does this make since ?

Robert - USA

18076

Answer

A problem with most lights is that the wave spreads out as it travels away from its source. There is a distance where the energy is too small to see. Stars that are many light years away are so huge and bright that we can still see them. Astronomers estimate their distance by how much the light has dimmed.

A laser beam of light does not spread out, so that would be better to shine. Someone ten light years away could not see that beam until ten years from now.

So, when we look at distant stars, they probably aren't in the same position right now. In fact, some distant stars that we see right now may have even exploded and disappeared for all we know.

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