speed of light

Do we sense some new world record holders on the horizon?
Consider: light travels at a speed of 186,000 miles per second (or 300 million meters per second), so if you're looking at
You've likely heard the saying: Looking out into space is the same as looking back in time. But what does that mean, scientifically speaking? It turns out that astronomers can observe stars and planets as they were in the past since it takes light quite some time to travel from those distant celestial objects all the way to Earth -- and the farther an object is, the longer it takes for the light to reach us. How is that even possible? HuffPost Science's Jacqueline Howard reports.
You've likely heard the saying: Looking out into space is the same as looking back in time. But what does that mean, scientifically speaking? It turns out that astronomers can observe stars and planets as they were in the past since it takes light quite some time to travel from those distant celestial objects all the way to Earth -- and the farther an object is, the longer it takes for the light to reach us. How is that even possible? HuffPost Science's Jacqueline Howard reports.
"I've taken liberties with certain things like the alignment of planets and asteroids, but overall I've kept the size and
You may think your microwave is good only for making popcorn or heating up last night's leftovers. But with a big chocolate
Voice Over: Phil Anderson Science Advisor: Becky Thompson, PhD Head of Public Outreach, APS Physics www.APS.org Science Advisor: Toni Sauncy, PhD Director, Society of Physics Students & Sigma Pi Sigma, American Institute of Physics www.SPSnational.org Producer: Rebecca Adams Videographer/Editor: Amber Genuske Animation: Noelle Campbell
You can go ahead and try to measure the speed of light in a vacuum if you like. If your measuring instruments are properly calibrated by an atomic clock, then you are going to get 299,792,458 meters per second every time.
What's the takeaway? Maybe this: When it comes to accepting a new value for fastest speed in the universe, let's take it