#General Relativity

Content tagged "General Relativity".

2 items (2 articles, 0 stories)

Articles

The Best Way to Measure Our Galaxy's Black Hole? A Dead Star's Heartbeat

September 26, 2026

At the center of the Milky Way sits a black hole with the mass of 4 million Suns. Right next door, astronomers are hunting for a dead star that blinks with millisecond precision — and if it's real, it could become the ultimate tool for testing Einstein's theory under the most extreme gravity in the galaxy.

Cosmic Mysteries #black holes#neutron stars#pulsars#General Relativity

Why Does a Black Hole Show a Ring of Light? Inside the Physics of the Photon Sphere

March 20, 2026

Black holes trap even light—so how can we see a glowing ring around them? This explainer walks through the photon sphere, the EHT image of M87, and the gravitational lensing that turns the cosmos's darkest objects into its most spectacular portraits.

Cosmic Mysteries #Black Hole#Photon Sphere#General Relativity