Articles About Stars (6)
![Astronomy Glossary - Terms & definitions Astronomy Glossary - Terms & definitions](http://webcf.waybackmachine.org/web/20210814184937im_/https://c.tadst.com/gfx/150x84/fbimage-glossary--astronomy.png?1)
Astronomical Glossary - Terms & Definitions
What do astronomers really mean when they use those technical terms?
![Illustration of altitude and azimuth in the celestial sphere.](http://webcf.waybackmachine.org/web/20210814184937im_/https://c.tadst.com/gfx/150x84/horizontal-coordinate-system.png?1)
Altitude & Azimuth: 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.
![Illustration image](http://webcf.waybackmachine.org/web/20210814184937im_/https://c.tadst.com/gfx/150x84/tell-time-with-stars.png?1)
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.
![Illustration image](http://webcf.waybackmachine.org/web/20210814184937im_/https://c.tadst.com/gfx/150x84/measuring-sky-with-hand.png?1)
How to measure the sky
Measure the sky and find out distances between celestial objects using your hands and fingers.
![An image of the solar system showing the alignment of the Earth, Jupiter, and Saturn for the Great Conjunction of 2020.](http://webcf.waybackmachine.org/web/20210814184937im_/https://c.tadst.com/gfx/150x84/great-conjunction-2020.png?1)
What Is a Conjunction?
A conjunction is when planets like Mars, Jupiter, or Saturn, or other bodies like stars or the Moon, meet in the sky. Why and when do conjunctions happen?
![Screenshot of timeanddate.com's Night Sky Map for December 21, 2020, shortly after sunset in the northern hemisphere.](http://webcf.waybackmachine.org/web/20210814184937im_/https://c.tadst.com/gfx/150x84/night-sky-map-great-conjunction.jpg?1)
Great Conjunction 2020
In December 2020, Jupiter and Saturn met in the sky in a rare Great Conjunction.