Aurora Borealis and Aurora Australis
An aurora is a natural phenomenon that creates bright and colorful light displays in the sky. In the Arctic Circle, ...
An aurora is a natural phenomenon that creates bright and colorful light displays in the sky. In the Arctic Circle, ...
Viewing an object by looking slightly to its side. This technique can help you detect faint objects that are invisible ...
Also known as the poles, this is an imaginary line through the center of rotation of an object.
An object's cardinal direction, such as north, east, south, or west.
The middle of the three rings of Saturn that are easily seen in a small telescope.
A few "beads" of sunlight, shining between mountain peaks and through the valleys along the Moon's edge in the moment ...
A unit of measure of atmospheric pressure. One bar is equal to 0.987 atmospheres, 1.02 kg/cm2, 100 kilopascal, and 14.5 ...
A lens that's placed into the focusing tube to effectively double or triple a telescope's focal length and, in turn, ...
The common center of mass about which two or more bodies revolve.
Downlink from a spacecraft that immediately indicates the state of the spacecraft as being one of several possible states by ...