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Celestial Coordinates

Astronomers measure the positions of astronomical objects using coordinates called right ascension and declination — the equivalent of longitude and latitude here on Earth. If you’re standing on Earth’s equator, the celestial equator stretches from east to west directly across the top of the sky, dividing the sky into northern and southern hemispheres.

Radio Programs

Vernal Equinox A new season and a new beginning March 20, 2022

Moving South A star that’s moving south April 3, 2021

North Pole Aiming away from the Milky Way May 9, 2020