General Relativity
Galaxies Have Been Found With no Dark Matter at all
According to new research led by Dutch astronomers, there may be lots of galaxies in the Universe that have no…
A Black Hole Emitted a Flare Away From us, but its Intense Gravity Redirected the Blast Back in our Direction
Using the XMM-Newton and NuSTAR X-ray telescopes, an international team of scientists were able to see light coming from behind…
Gaia Finds 12 Examples of Einstein Crosses; Galaxies Being Gravitationally Lensed so we see Them Repeated 4 Times
After examining data from the Gaia Observatory, a team of researchers found 12 more examples of the rare phenomenon known…
Alcubierre Gives us an Update on his Ideas About Warp Drives
A new look at warp drive fuels hope that it might be possible after all.
If We Used the Sun as a Gravitational Lens Telescope, This is What a Planet at Proxima Centauri Would Look Like
A recent study shows how the Sun could be used as a gravitational lens to take direct images of nearby…
Black Holes Gain new Powers When They Spin Fast Enough
Fast spinning black holes could have features different from those predicted by general relativity.
We actually don’t know how fast the Milky Way’s supermassive black hole is spinning but there might be a way to find out
The stars at the center of our galaxy could tell us just how fast our closest supermassive black hole is…
Black Holes Make Complex Gravitational-Wave Chirps as They Merge
When black holes collide, they emit chirps of gravitational waves even after they have merged.
Gravitational-Wave Lensing is Possible, but it’s Going to be Incredibly Difficult to Detect
Because gravitational waves travel at the speed of light, they can be lensed just as light waves are. But observing…
Einstein. Right again
Astronomers can now test the limit of relativity and whether new physics lies beyond Einstein's model.