These are the top space stories this week from Space.com.
Albert Einstein's theory of special relativity explains how space and time are linked, but it doesn't include acceleration. By including acceleration, Einstein later developed the theory of general relativity, which explains how massive objects in the cosmos distort the fabric of space-time. The theory explains how this distortion is felt as the force of gravity, as it predicts how much the mass of an object curves space-time. Scientists test relativity by observing objects in space and seeing if their behaviors match up with Einstein's explanations of space-time and gravity, for instance by observing how light bends around massive objects as it travels towards Earth.
The botched launch of two global-positioning satellites four years ago has proven to be a real gift to physicists.
Once again, a decades-old theory of gravity has survived a modern scientific onslaught. Einstein wins again.
The discovery of wobbling "hotspots" circling the drain of a massive black hole offers exciting new evidence for the behemoth that lies at our galaxy's center.
A new technique that analyzes clashing observations may help solve the mystery behind the expansion of the universe.
Einstein's theory of general relativity has passed its most stringent test to date with flying colors, a new study reports.
As good skeptics, we shouldn't immediately believe general relativity's tangle of mathematics at first blush. Instead, we need evidence. Good evidence.
A new study validates Einstein's theory of general relativity in a distant galaxy for the first time.
Albert Einstein's theory of general relativity is a monumental achievement of human ingenuity, creativity and perseverance — to say the least.
Stephen Hawking may have been a world-renowned genius, but he didn't take himself too seriously, according to a tribute published online today (April 12) in the journal Science.
Those inspired by Stephen Hawking's classic book "A Brief History of Time" and by his legacy in cosmology are now picking up where Hawking's genius left off.
There's a lot we still don't know about black holes, but these light-gobbling behemoths would be even more mysterious if Stephen Hawking hadn't plumbed their inky depths.