The universe tells us its story mainly through light and other wavelengths of electromagnetic radiation. We learn about the planets, stars, and galaxies by their light—visible light, and also ...

How space telescopes capture distant galaxies using infrared imaging, precision optics, and astronomy technology beyond Earth's atmosphere.

David L. Crawford, an astronomer and one of the pioneers of the modern dark-sky movement, died peacefully July 22 in Carlsbad, California. During a decadeslong tenure at Kitt Peak National Observatory ...

COUDERSPORT, Pa. — Up a winding road that cuts through the Allegheny Plateau, hundreds of amateur astronomers in campers and pickups stream into northern Pennsylvania each spring and summer in search ...

The sky may brighten by a factor of two to three due to reflection of sunlight off megaconstellation satellites, a new report finds. When you purchase through links on our site, we may earn an ...

The CTIO 4-meter Blanco telescope, silhouetted against the Magellanic Clouds (at left) and the Milky Way, as seen from Cerro Tololo in Chile. Artificial light pollution here on Earth poses more of a ...

This story is part of the Grist series Coming to our Senses, a weeklong exploration of how climate change is reshaping the way we see, hear, smell, touch, and taste the world around us. The beginning ...

In 2014, a NASA telescope observed that the infrared light emitted by a massive star in the Andromeda galaxy gradually grew brighter. The star glowed more intensely with infrared light for around ...