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light year
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light year

Distance travelled by a beam of light in a vacuum in one year. It is equal to approximately 9.4605 × 1012 km/5.9128 × 10 12mi.
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Astronomers in Chile and Japan have for the first time seen part of the "cosmic web" of galaxies that permeates the known universe in a gigantic assembly some seven billion light-years from Earth.
Astronomers see 'skeleton' of the universe by AFP / AFP Global Edition
Light travels at about 186,000 miles per second, so one light-year is the equivalent of about 5.
The hungry blob at the edge of the universe by Ornes, Stephen / Science News for Kids
The record-breaker sits billions of light-years from Earth and has about a thousand times the mass of the Milky Way, astronomers report in August in Astronomy & Astrophysics.
Galaxy cluster outweighs neighbors: distant find could support the ... by Yeager, Ashley / Science News
 
 
 
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