The University of Delaware’s Department of Physics and Astronomy offers an undergraduate major program leading to the B.S. in physics, with the option of a concentration in astronomy/astrophysics, as ...

The phenomenon of a Full Moon arises when our planet, Earth, is precisely sandwiched between the Sun and the Moon. This alignment ensures the entire side of the Moon that faces us gleams under ...

Editor’s note: This article was originally published Aug. 13, 2025, and has been updated to include new text and illustrations featured in the January 2026 issue of Astronomy. Using an artificial ...

Capture the cosmos with the best astronomy cameras for dedicated shots of nebulae or galaxies. A niche gift for the astrophotographer in your life. When you purchase through links on our site, we may ...

"Dark matter can be red hot when it is born, but still have time to cool down before galaxies begin to form." ...