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Bookmark or Share- How Do We Know How Far Away the Stars Are? | BritannicaUniversity of Wisconsin—JPL/Caltech/NASA. The closest star, Proxima Centauri, is 4.24 light-years away. A light-year is 9.44 trillion km, or 5.88 trillion miles. That is an incredibly large distance. Walking to Proxima Centauri would take 950 million years.
- What is a light year? Find out. | Sky Archive | EarthSkyChristopher Crockett. February 20, 2013. A light-year is how astronomers measure distance in space. It’s defined by how far a beam of light travels in one year – a distance of six trillion...
- Here are the James Webb Space Telescope's first images - Science NewsThe galaxies captured in the first released image lie behind a cluster of galaxies about 4.6 billion light-years away. The mass from those closer galaxies distorts spacetime in such a way...
- Cosmic Distances - NASA ScienceA light year is the distance a photon of light travels in one year, which is about 6 trillion miles (9 trillion kilometers, or 63,000 AU). Put another way, a light year is how far you'd travel in a year if you could travel at the speed of light, which is 186,000 miles (300,000 kilometers) per second.
- What is a light-year? | SpaceFor example, the nearest star to our sun, Proxima Centauri, is 4.2 light-years away, meaning the light we see from the star takes a little over four years to reach us. How far is a...
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