What are gravitational waves?
Why merging black holes change measured separations, how a laser interferometer reads that imprint and how real LIGO data differ from sound and teaching sketches.
Tag archive
#black holes
Articles: 5
Can black holes evaporate?
What Hawking radiation predicts, how mass relates to temperature, and why a laboratory analogue is not a detection of black-hole evaporation.
What happens if you approach a black hole?
Tidal stretching, hot gas and the event horizon have different effects. What can a spacecraft survive, and why does a distant observer see the fall differently?
What is a black hole?
Event horizon, singularity and shadow are different concepts. Understand the boundary on escaping light, the EHT image and why black holes do not suck in everything.
What lies at the center of the Milky Way?
Sagittarius A*: how S2’s motion and the EHT ring reveal a central mass, and why an image of the shadow is not a photograph of the horizon.