General Relativity

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…

2 months ago

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…

6 months ago

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.

7 months ago

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…

9 months ago

Black Holes Gain new Powers When They Spin Fast Enough

Fast spinning black holes could have features different from those predicted by general relativity.

10 months ago

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…

11 months ago

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.

12 months ago

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…

12 months ago

Einstein. Right again

Astronomers can now test the limit of relativity and whether new physics lies beyond Einstein's model.

12 months ago

The Shadow from M87’s Supermassive Black Hole has Been Observed Wobbling Around the Galaxy for Years

Over the past decade, the shadow of a black hole in M87 has been wobbling, which tells us about how…

12 months ago