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Cosmic microwave background

Definition

Cosmic microwave background

Cosmic microwave background is a sea of radiation that provides us with evidence for the big bang. The big bang is now orthodoxy, although without a theory than unifies general relativity with quantum theory, we’re stuck in explaining exactly what it was or why it happened.

General_relativity

Definition

General relativity

What is quantum field theory?

Question

What is quantum field theory?

Black holes

Definition

Black holes

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Physics

From the archives: How a cosmic illusion proved Einstein’s relativity

Regulars

What would happen if you got sucked into a black hole?

Physics

What would happen if you got sucked into a black hole?

Features

solar eclipse

Physics

Must we topple Einstein to let physics leap forward again?

Culture

Einstein quiz: Can you guess which quotes are really his?

Physics

Einstein quiz: Can you guess which quotes are really his?

News

quantum artwork

Physics

The quantum world is infamously weird – now we might know why

Features

Star smash-up is yet more evidence Einstein got it right about gravity

Physics

Star smash-up is yet more evidence Einstein got it right about gravity

General relativity has survived its latest test after observations of a violent collision between neutron stars tallied perfectly with Einstein’s theory

News

Physics

Einstein was wrong: Why 'normal' physics can't explain reality

Features

Video

Roberto Trotta: What has Einstein ever done for you?

Video

Video

The legacy of Stephen Hawking

Video

Space

10 mysteries of the universe: Is Earth in a special place?

Features