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 afterglow of the Big Bang was discovered by accident in 1965

75 sec read

Space Cosmology

Distant galaxies are receding faster than light — and we can still see them

65 sec read

Space Cosmology

The universe has no center and no edge

70 sec read

Space Cosmology

The observable universe is about 93 billion light-years across

50 sec read

Space Cosmology

Everything we can see is only about 5% of the universe

45 sec read

Space Cosmology

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

45 sec read

Space Cosmology

The universe is about 13.8 billion years old

50 sec read