Gift of Apollo • 1989 • episode "8/10" • The Sagan Series

13:22

Thanks to observations of galaxy redshifts, we can tell that the universe is EXPANDING! Knowing that the universe is expanding and how quickly its expanding also allows us to run the clock backwards 14 billion years to the way the universe began - with a bang.

42 • Crash Course Astronomy • 2015 • Astronomy

42:43

Degrasse discusses our nearest neighboring planet Venus and its climate, the climate change on Earth and if it is caused by humans.

S1E12 • Cosmos: A Spacetime Odyssey • Astronomy

10:33

Lunar days are about 14 Earth days long, and when night comes, temperatures plummet. But there are other issues to deal with as well. For instance, how can we overcome the moon's lack of atmosphere; difficult terrain with abrasive particles, and the effects of cosmic background radiation?

4/5 • Destination: Moon • 2016 • Astronomy

4:39

The shape, contents and future of the universe are all intricately related. We know that it's mostly flat; we know that it's made up of baryonic matter (like stars and planets), but mostly dark matter and dark energy; and we know that it's expanding constantly, so that all stars will eventually burn out into a cold nothingness. Renée Hlozek expands on the beauty of this dark ending.

TED-Ed • Astronomy

49:00

For millennia humans have seen our star, the Sun, through the Earth’s atmosphere. But the Space Age has given us a new perspective that has revealed the many faces of the Sun in X-rays, ultraviolet/visible light, heat, and radio. We reveal hidden secrets of the Sun, like the power of solar wind.

5/8 • The Planets • 2004 • Astronomy

59:16

Professor Brian Cox continues his tour of the solar system revealing that it was once home to not one, but two blue planets.

2/5 • The Planets 2019 • 2019 • Astronomy