Many scientists from a variety of disciplines have advanced mankind's understanding of the Universe. Some are household names. Others may be less familiar.
This section features some of the important investigators that have featured in BBC television coverage.
Image: Jocelyn Bell Burnell, discoverer of pulsars in 1977 (credit: Robin Scagell/Science Photo Library)
A patent office clerk revolutionises physics.
Astronomers find traces of the early Universe.
The 'Isaac Newton of radio astronomy' builds a great telescope.
An American astronomer works to popularise science.
An Austrian physicist shows how the light of moving stars changes.
An American astronomer measures the Universe's expansion.
An astrophysicist estimates how many civilisations are out there.
Hoyle puts forward an alternative to the Big Bang.
Marcy finds hundreds of planets orbiting distant stars.
The great English scientist makes fundamental discoveries.
A British astronomer finds strange pulses coming from space.
Kepler describes how the planets move around the Sun.
A particle hunter seeks to explain the Universe's early days.
Dirac seeks to explain the behaviour of matter at a very small scale.
A superstar British cosmologist tries to explain black holes.
Rubin finds evidence of invisible matter.
A 19th century Irish astronomer builds the world's largest telescope.