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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 special point for the Sun March 19, 2018

Guiding Lights Guiding ships by the stars December 5, 2016

Galactic Grid Plotting the galaxy and beyond August 30, 2016

Vernal Equinox A celestial starting point March 19, 2016

Celestial Equator Splitting the night sky in half January 30, 2015