Space.com:
Between this evening and tomorrow morning, 2021 December,
astronomers and the general public in North and South America
are in for a treat: a total lunar eclipse. A lunar eclipse
occurs when Earth lines up directly between the Sun and the
Moon, blocking the Sun's rays and casting a shadow on the Moon.
As the Moon moves deeper into Earth’s shadow, it changes
color from gray to orange or red, because indirect sunlight
still passes through Earth’s atmosphere and casts a glow
on the Moon. Space.com provides links to a lunar eclipse
viewing
guide,
photos
of a total lunar eclipse, a
table
showing the times of the different states of the eclipse in
different time zones, and a
star
chart.
