The image of supermassive black hole Sagittarius A * was created using data from the Event Horizon Telescope Collaboration.

Four University of Arizona scientists have been selected to receive “Oscar of Science” awards for their collaborative work on the Event Horizon Telescope project and for capturing the first ...

Mercury will reach its greatest eastern elongation, marking the point where it is farthest from the Sun in the evening sky.

The Golden Handle, a monthly lunar spectacle, will be visible tonight as sunlight illuminates the Montes Jura mountain range ...

The Buck Moon, like every full moon, is a reminder of Earths rhythms and its ancient connection to lunar cycles. Whether ...

The "new stars" are best seen from the Southern Hemisphere, but people have spotted them from the United States by looking ...

Less than two weeks later, on June 25, reports began to circulate of a second nova blossoming in the southern night sky, this ...

Friday, July 4 Mercury reaches its greatest eastern elongation from the Sun, standing 26° from our star at 1 A.M. EDT. We’ll ...

July 2025 promises a cosmic spectacle with star clusters, meteor showers, and rare planetary sightings, including the elusive ...

When the Sun hits the rims of the Blanchinus, La Caille, and Purbach craters at just the right angles during the Moon's cycle ...

Earth lives in a shooting gallery, with small and large rocky bodies in abundance in our solar system. Are we in danger of ...

Mercury is the month's highlight, reaching greatest elongation July 4. Also on show in the Southern Hemisphere: Mars, Saturn, ...