Free Science Videos and Lectures

Sagan was central to the discovery of the high surface temperatures of the planet Venus.

In the early 1960s, no one knew for certain the basic conditions of Venus' surface and Sagan listed the...

This science video contains:
venus, carl sagan, planet, nasa, 1960

The video of the very first moon landing of the Apollo 11 mission in 1969!

Neil Armstrong was the first man to set foot on the moon with his now legenday words "One small step for man, a giant...

This science video contains:
nasa, spacecraft, moon, moon landing, neil armstrong, houston, flag, buzz aldrin

On one of the Moon missions, NASA astronauts decided to prove Galileo Galilei right.

He reasoned that if there was no atmosphere, no dragging force then two objects of different mass falling from...

This science video contains:
ground, force, nasa, moon, galileo galilei, astronaut, atmosphere, gravity, hammer, feather

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