Question

What is an eclipse? when does a lunar eclips occur?

Answer 1

An alignment of astronomical objects whereby one object comes between the observer (or notional observer) and another object, thus obscuring the latter


it occurs when the Earth casts a shadow over the Moon

Answer 2

Especially, an alignment whereby a planetary object (for example, the Moon) comes between the Sun and another planetary object (for example, the Earth), resulting in a shadow being cast by the middle planetary object onto the other planetary object. when the moon appears darkest or reddish in colour. To witness this rare celestial phenomenon, set your alarms for 1 am to see the moon 'blush' red. Lunar Eclipse 2018: The next total lunar eclipse will occur on December 31, 2028.