Free Science Videos and Lectures

Mars is the fourth planet from the Sun in the Solar System. The planet is named after Mars, the Roman god of war. It is also referred to as the "Red Planet" because of its reddish appearance as...

This science video contains:
mars, earth, planet, surface, map, red planet, rotation, seasons

The universe began with the big bang, and for the first four hundred thousand years all matter was ionised, indicated by the blue region in the diagram. When the universe had cooled enough to allow...

This science video contains:
matter, stars, earth, big bang, galaxies, light, solar system, time, space, supernova, expansion

This is our home. Earth from 4 billion miles (Voyager 1991).

This is here. This is us. On it every one you ever heard of. Every human being who has ever lived. All our joys and sufferings....

This science video contains:
earth, carl sagan, planet, milky way, voyager, satellite, human, inventor, explorer, universe

Do you know how tiny Earth is compared to other planets and stars?

We are very very tiny!
Earth is compared to Venus, Mars, Mercury and Pluto.
Then to Jupiter, Saturn , Uranus and Neptune
Then to...

This science video contains:
planets, stars, mercury, mars, venus, earth, neptune, saturn, jupiter, sun, sirius, pollux, arcturus, milky way, pluto, uranus, galaxy, sky, nasa, hubble telescope

The video shows how each planet scales in size relative to each other.

The exploration begins at the smallest planet Mercury which has diameter of just 4880 km, then comes Mars (6794 km), Venus,...

This science video contains:
planets, stars, mercury, mars, venus, earth, neptune, saturn, jupiter, sun, sirius, pollux, arcturus, rigel, beteigeuze, antares, my cephei, vv cephei