The moon rotates, completing one rotation each month so we only see one side.
Astronomy
The light year (ly) is a unit of length that is the distance light travels in a vacuum in one Earth year. One light year is approximately 9.46 trillion kilometers (9.46 x 1012 km) or 5.88 trillion miles (5.88 x 1012 mi). The light year is used to describe distances to stars without having to use very […]
What Is a Light Year? Definition and Examples
It never gets truly dark at night because of an effect called airglow. Airglow is similar in color to the aurora, but you don’t have to visit a polar region to see it. While the aurora is light released by the interaction between magnetosphere and the solar wind, airglow is […]
What Is Airglow? Why the Night Sky Is Never Truly ...
We all know planets orbit stars and moons orbit planets. Have you ever wondered whether a moon can have a moon of its own (a submoon)? Theoretically, the answer is yes, but there is a good reason why we haven’t discovered any submoons around moons in our own solar system. […]
Can a Moon Have a Moon?
All of the planets, comets, and asteroids in the solar system orbit the Sun. The average distance between the Earth and the Sun is 92,955,807 miles (149,597,870 km). Most people just round it up to 93 million miles. This distance is called an astronomical unit or AU and is used […]
How Far Is the Sun From Earth?
A full moon brings out the romantic in people. Throughout our history, we’ve given the full moon names depending on the time of year, color, or other astronomical events. This Full Moon Names word search has 30 different traditional names for the full moon. Find the different full moon names […]