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Clip: Season 44 Episode 11 | 1m 47s
Why don't solar eclipses happen every month? After all, you only need three things to make a solar eclipse: the Sun, the Earth and the Moon.
Aired: 08/21/17
Why Eclipses Don't Happen Every Month
How an Eclipse Proved Einstein Right
The total solar eclipse of 1919 led Albert Einstein down the path toward stardom.
With the US eclipse just over a week away, here’s how you can watch it safely.
The country’s first solar eclipse in 99 years will cast a light on the Sun’s secrets.
The country’s first solar eclipse in 99 years will cast a light on the Sun’s secrets.
Experts drill into the impact crater of an asteroid that created a worldwide cataclysm.
NOVA uncovers the secrets of nature’s battleground—claws, horns, fangs and all.
Scientists uncover geologic evidence of epic floods that tore through ancient landscapes.
Experts reconstruct the Great Hurricane of 1780 to help predict the risk of future storms.
Scientists hunt for a mega-eruption that plunged medieval Earth into a deep freeze.
How has China’s magnificent Forbidden City withstood centuries of earthquakes?
Discover the world of medieval knights and see how their armor was made.
Follow Cassini's final days as it skims the cloud tops before plunging into the planet.
The country’s first solar eclipse in 99 years will cast a light on the Sun’s secrets.
