speed of light

Do we sense some new world record holders on the horizon?
Now, the two stars that make up the outer part of the Big Dipper’s bowl will always point you directly to the north star
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.
An eye-opening new animation (above) really puts things in perspective. It shows that even if you travel at the speed of
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.
The paper's author, University of Maryland, Baltimore County physicist Dr. James Franson, said his work had been "sensationalized
50 Interesting Facts About The Earth How NASA's Twin Radiation Belt Storm Probes Work (Infographic) NASA Probes Cut Though
But there is another way to produce B-modes as well: primordial gravitational waves produced during the earliest moments
Based on the Standard Model of particle physics, which governs the realm of the very tiny, Heeck calculated that photons
"You can try to probe these theories using big accelerators, but you would need to produce electrons with seven times the
Researchers at the University of Darmstadt in Germany achieved an incredible feat when they stopped light for an entire minute inside a crystal.
What happened? The light from the secondary source remained trapped inside the crystal. Through multiple trials, the team
To find this tiny fluctuation, the researchers say, one could measure how light disperses at long distances. Some astronomical
HOUSTON — A warp drive to achieve faster-than-light travel — a concept popularized in television's Star Trek — may not be