Astrophysics

The physics of the cosmos — black holes, neutron stars, gravitational waves, and the speed of light.

All Solar System Stars & Galaxies Cosmology Space Exploration Astrophysics

Space Astrophysics

The calcium in your bones and iron in your blood were forged inside stars

70 sec read

Space Astrophysics

In 2015 we caught a ripple in spacetime a fraction of a proton wide

70 sec read

Space Astrophysics

A teaspoon of neutron star would outweigh a mountain

75 sec read

Space Astrophysics

Nothing can escape a black hole's event horizon, not even light

70 sec read

Space Astrophysics

Time runs slower near a black hole

50 sec read

Space Astrophysics

The fastest known star spins 716 times every second

50 sec read

Space Astrophysics

Today's sunshine began its journey tens of thousands of years ago

50 sec read

◆ On this day

On this day in Astrophysics

Browse all 7 by date →

15 Feb 1564

Space Astrophysics

Galileo Galilei is born

40 sec read

19 Feb 1473

Space Astrophysics

The man who moved Earth out of the center

45 sec read

10 Aug 1675

Space Astrophysics

The foundation stone of the Royal Observatory, Greenwich, was laid

45 sec read

16 Nov 1974

Space Astrophysics

The Arecibo message beamed humanity's hello to the stars

45 sec read

27 Dec 1571

Space Astrophysics

Astronomer Johannes Kepler was born

50 sec read

29 Feb 1504

Space Astrophysics

Columbus weaponizes a lunar eclipse in Jamaica

45 sec read

25 Aug 1609

Space Astrophysics

Galileo showed his telescope to Venetian lawmakers

45 sec read