Facts about Lunar Eclipses
- 08
Totality during a lunar eclipse occurs because the Moon passes through Earth's umbra at roughly 1 kilometer per second, making the eclipse visible from the same hemisphere for up to 1 hour 42 minutes.
- 07
Earth's shadow cone extending 1.4 million kilometers into space allows lunar eclipses to occur only during full moons when the Moon passes directly through this umbral region.
- 06
Approximately 35 lunar eclipses occur every century, yet any single location on Earth witnesses a total lunar eclipse only once every 375 years on average.
- 05
Ancient Babylonians predicted lunar eclipses using the 18-year-11-day saros cycle, enabling them to forecast celestial events millennia before modern astronomy.
- 04
Rayleigh scattering causes lunar eclipses to display varying shades of red depending on Earth's atmospheric dust and volcanic aerosol content at that time.
- 03
A total lunar eclipse can last up to 1 hour 42 minutes in the umbra, while the entire eclipse event spans nearly 6 hours from first contact to final separation.
- 02
The Moon's umbral shadow travels across Earth at speeds up to 1,100 meters per second during totality, making lunar eclipses visible from only half the planet at any given time.
- 01
During the lunar eclipse of January 21, 2019, Earth's shadow turned the Moon a deep copper-red color visible from all continents simultaneously.