Astronomical Glossary - Terms & Definitions
What do astronomers really mean when they use those technical terms? more
Articles About Stars (4)
The Horizontal Coordinate System
Learn how to use altitude (elevation) and azimuth angles to locate any object in the sky, such as stars, planets, satellites, the Sun, or the Moon. more
Timekeeping by Stars
Out and about at night without a watch or a smartphone readily available? If you are in the Northern Hemisphere use the Big Dipper and the North Star to tell the time. more
How to measure the sky
Measure the sky and find out distances between celestial objects using your hands and fingers. more
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