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You are looking at the light that that star made 10 billion years ago. Since it takes that many years for the light to reach earth, you would not notice if that star died for 10 billion years, just like you wouldn't notice by looking at it that the sun suddenly died for 8 minutes (The amount of time it takes for its light to reach the earth). We are constantly looking at the sun 8 minutes ago!

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Will the Hubble Space Telescope capture an image of 100 billion galaxies in the universe into one picture?

The Hubble Space Telescope is a space telescope that was carried into orbit by a Space Shuttle in 1990 and remains in operation. Although it has taken photos from other galaxies, it does not have the capability of capturing a single image of 100 billion galaxies on one photo.


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The answer is quite more complicated than it seems. The farthest astronomers have seen in the visual spectrum is the Hubble Ultra Deep Field. This picture looks back in time about 13 billion years, and the galaxies it has captured wereprobably no more than 800 million years old. But it is a common misconception that since light travels at a set speed, a picture looking back 13 billion light years must be a picture of something 13 billion light years away. This isn't the case. Since the universe is constantly expanding, the galaxies depicted in the HUDF picture are no longer 13 billion light years away. In reality, the universe is now about 90-140 billion light years across. It comes off as a paradox because the universe technically expanded faster than the speed of light (how else could light from galaxies now 90 billion light years away reach us in 13 billion years?) It's a strange consequence of general and special relativity. Put simply, the light from the farthest objects scientists can see originated 13 billion light years ago, but these objects are not that far away in real time.


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