Eclipse Geeks


Eclipse Geeks - All you ever wanted to know about eclipse and other celstial bodies


Penumbral Lunar Eclipse

 image right: Before eclipse.
 image left: The Moon in Earth’s penumbra shadow. The Moons
 northern limb is very close to Earth's umbra shadow, while the
 Moon's southern limb is near the outer rim of Earth's penumbra.

 Southern hemisphere of the Moon is almost indistinguishable,
 even when compared side-by-side to a non-eclipsed Moon..

Mars two moons - Phobos and Deimos

Phobos is approximately 21km / 13 miles in diameter and orbits Mars in 7 hours, 39.2 minutes. A Martian day is 24 hours 37 minutes long and due to the rapid motion of Phobos, when conditions are correct, Phobos can create two eclipses per Martian day / Sols. The event is nevertheless still classified as an annular eclipse. An observer on the surface of Mars would never experience a solar eclipse for longer than about thirty seconds.

Deimos's diameter is approximately 12km / 7.5 miles and is too small and too far from Mars to cause an eclipse of any significance. The best an observer on Mars would see is a small object in transit across the surface of the Sun. Deimos would appear about as bright as the planet Venus looks from Earth and approximately the same size.

Mars does not have spectacular eclipses as occur on Earth and the motion of Deimos is regarded more of a transit rather than a true eclipse as observed from the surface of Mars. from the surface.