All the tools for measuring it in the local, recent Universe give fairly consistent results, around 72 to 74 kilometers per ...

How is astronomical distance determined? Just cannot get my head around cepheid variables, parallax, etc. How is it possible to tell how far away something is when you cannot bounce a radar beam off ...

After nearly a decade of careful observations astronomers have measured the distance to our neighboring galaxy, the Large Magellanic Cloud, more accurately than ever before. This new measurement also ...

The Universe is expanding. In the standard model of cosmology the rate of that expansion is given by the Hubble parameter, which is a measure of the dark energy that drives cosmic expansion. New ...

When more than a dozen ways of measuring the universe’s expansion all point to the same number, and that number still clashes ...

Yardsticks are very useful around the house when you need a measurement. (I have also used them to fish out toys the cat knocked under a low piece of furniture.) They are standards by which we can ...

This image of NGC 5468, a galaxy located about 130 million light-years from Earth, combines data from the Hubble and James Webb space telescopes. This is the farthest galaxy in which Hubble has ...

Trying to measure the size of the universe is no easy task. We know that the universe is expanding, though the exact rate of this expansion is not yet fixed. So one method that astronomers use to tell ...

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