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If something in space is 10 light years away, we would only observe it as it was 10 years ago, as this is the time light has taken to reach us.

A light year is a distance not a time. It is the distance that light travels in a year (about 5865696000000 miles or 9385113600000 Kilometres) so you cannot ask how long ago is 10 light years away. That would be the same as asking how long ago is the bus station away.

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โˆ™ 2009-07-28 21:29:42
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Q: How long ago is 10 light years away?
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Related questions

If a star is 2.5 million light years away approximately how long ago did the light leave?

2.5 million years


If you are detecting a super nova how long ago did it occur?

Depends on the distance from us. If it was 100 light years away, it would have occurred 100 years ago.


How long ago is 14 light years?

A light year is a measure of distance, not time; it is the distance that light travels in a year. If you look at a star that is 14 light years away, you see it as it was 14 years ago. 14 light years is about 82 trillion miles or 130 trillion kilometers.


If you look at a star that is 14 light-years away how long ago did the light you are seeing leave the star?

Since 1 light year is the distance light travels in a year, it would take 14 years for light to reach us from a star 14 light years away.


If you look at a star that is 14 light- years away how long ago did the light you are seeing leave the star?

This cannot be answered. This does not make any sense.


If you look at a star that is 14 light years away how long ago did the light you are seeing leave the star?

This cannot be answered. This does not make any sense.


What is happening when you look at an object that is 1000 light-years away?

You are seeing it as it was 1,000 years ago.


The distance to the Andromeda Galaxy has been measured by several methods and is about 2.4 million light years When we look at the Andromeda Galaxy how long ago was the galaxy in the form that we are?

About 2.4 million light years away.


You are observing a star about 100 light years away how old is the most recent information you can get aboutthis star?

if you are observing a star 100 light years away, you are looking at it as it was 100 years ago.


Example of light year?

a quasar 10 billion light years away; if you looked at it, you would see it as it was 10 billions years ago


How can we know how some parts of the universe looked a million years ago?

Light takes time to travel, so light reaching us from a million light years away has taken that long to travel to us. We see what it looked like when the light left.


Do astronomers see distant stars as they were long ago?

Yes. Because they are so far away, the light from the stars takes a long time to reach us (other than our star, the sun, which takes 8 minutes for the light to get here.) That way, a star 8 lightyears away, will be seen as it was 8 years ago.

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