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Light Speed

Special Relativity May Answer Faster-than-Light Neutrino Mystery

October 15, 2011

Want to stay on top of all the space news? Follow @universetoday on Twitter Oh, yeah. Moving faster than the speed of light has been the hot topic in the news and OPERA has been the key player. In case you didn’t know, the experiment unleashed some particles at CERN, close to Geneva. It wasn’t [...]

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Faster Than The Speed Of Light… OPERA Update

September 24, 2011

A few days ago, the physics world was turned upside down at the announcement of “faster than the speed of light”. The mighty neutrino has struck again by breaking the cosmic speed limit and traveling at a velocity 20 parts per million above light speed. To absolutely verify this occurrence, collaboration is needed from different [...]

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Breaking the Speed of Light

September 22, 2011

It’s been a tenet of the standard model of physics for over a century. The speed of light is a unwavering and unbreakable barrier, at least by any form of matter and energy we know of. Nothing in our Universe can travel faster than 299,792 km/s (186,282 miles per second), not even – as the [...]

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How Long Is A Light Year

December 27, 2009

Some people who ask the question, “How long is a light year?” actually think light year is a unit of time. Chances are, you found your way to this webpage with exactly the same idea in mind. A light year is actually a unit of distance. It is equivalent to the distance traveled by light [...]

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How Far Does Light Travel in a Year?

November 14, 2009

How far does light travel in a year? Light moves incredibly fast, sweeping past 299,792,458 meters in a single second. And so in a single year, light travels a total of 9,460,528,000,000 m, or 5,878,499,817 miles. As you probably know, astronomers use the distance that light travels in a year as a standard measuring stick [...]

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