September’s Full Corn Moon is eclipsed for some observers, Titan passes behind Saturn, and Mars moves north of Spica in the ...

Astronomers use many methods to determine this number, including gravitational lensing, the universe’s expansion rate, and more.

Today in the history of astronomy, NASA announces evidence of material being consumed by the black hole at the center of our ...

Planetariums around the world are invited to participate in this year’s edition of the IAU’s annual outreach event.

John Dobson, born in 1915, relocated to San Francisco from Beijing in 1927. Following a period as a monk within the Ramakrishna Order (1944-1967), Dobson cultivated a passion for astronomy. He is ...

August 22nd: The Swan Nebula (M17) reaches its highest point around 11 PM local daylight time, observable with binoculars or telescopes in northwestern Sagittarius. August 23rd: A New Moon, termed a ...

Equuleus, also known as the Foal, is a small and faint constellation located southwest of Pegasus. Unlike many constellations, Equuleus lacks bright stars, nearby stars, prominent meteor showers, or ...

Mars and Spica will appear in close proximity (2° separation) in the evening western sky shortly after sunset, setting before 9 PM local daylight time. Observations of Mars and Spica are best ...

While nearly all massive galaxies possess central black holes, the presence of such black holes in dwarf galaxies remains an open question, with previous estimates identifying them in only 0.5% of ...

Saturn, at magnitude 0.6 in Pisces, is observable in the southeast at approximately 30° altitude. Titan, Saturn's largest moon, undergoes an occultation behind Saturn, beginning around 11:10 P.M. EDT ...

James Van Allen, born in 1914, demonstrated early aptitude in science and mathematics, culminating in a physics PhD in 1939. His wartime contributions included developing antiaircraft radio technology ...