Hubble studies source of gravitational waves

On Aug. 17, 2017, weak ripples in the fabric of space-time known as gravitational waves washed over Earth. Unlike previously detected gravitational waves, these were accompanied by light, allowing astronomers to pinpoint ...

Seeing the light of neutron star collisions

When two neutron stars collided on Aug. 17, a widespread search for electromagnetic radiation from the event led to observations of light from the afterglow of the explosion, finally connecting a gravitational-wave-producing ...

What are neutron stars?

Thrilled physicists and astronomers announced Monday the first-ever observation of the merger of two neutron stars, one of the most spectacularly violent phenomena in the Universe.

Explainer: Why gravitational wave researchers won a Nobel

Three U.S.-based astrophysicists won the Nobel prize in physics Tuesday for their discovery of gravitational waves, a phenomenon Albert Einstein predicted a century ago in his theory of general relativity. Here's what their ...

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