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How to Describe the Image of a Star Which is 10 Light Years Away

Question: When I see a star that is, let’s say, 10 light years away; can I say that what…

How Do We Define Distance to a Star That is Currently 10 Billion Light Years From us in an Expanding Universe?

Question: It is said that light traveling from a star that is currently 10 billion light years from us…

Do Light Waves Get Stretched to Straight Lines By Moving Objects?

Question: Does light wave disintegrates(i.e. its crest and troughs vanishes leaving a straight line) when it travels unhindered and…

What Does the Expansion of the Universe Look Like from an Galaxy on the Edge of the Known Universe?

Question: If you were to project yourself instantly to the edge of the known universe, (knowing that the universe…

Can Atoms Travel Between Planets or Galaxies?

Question: To start, I know very little about what I am going to ask, so much of my question…

How Old is the Light from the Stars that we see in the Night Sky?

Question: One of the questions that always has remained unanswered to me is the following.  When we see the…

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