Cosmology

The universe as a whole — its Big Bang beginning, its expansion, and the dark stuff that fills it.

All Solar System Stars & Galaxies Cosmology Space Exploration Astrophysics

Space Cosmology

The CMB was found by accident in 1964 — and missed in 1941

90 sec read

Space Cosmology

Distant galaxies recede faster than light — and we see them

95 sec read

Space Cosmology

Why the observable universe is 93 billion light-years wide

90 sec read

Space Cosmology

Ordinary matter is only 5% of the universe — mostly unseen

85 sec read

Space Cosmology

The universe has no center: the Big Bang happened everywhere

100 sec read

Space Cosmology

The universe's expansion is speeding up, not slowing down

95 sec read

Space Cosmology

The universe is 13.8 billion years old, to within 0.3%

90 sec read