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.

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 ...

Temperature is a measure of the average energy of a collection of particles. (This is in contrast to kinetic energy, which is a measure of the energy carried by a single particle.) So, to answer a ...

Sound needs a medium (solid, liquid, or gas) to travel. Space is a vacuum, lacking the matter to carry sound waves. No sound in space means no echoes. While a near-perfect vacuum, some sounds can be ...

Yevgeny Khrunov, born September 10, 1933, was selected as one of the first Soviet cosmonauts in February 1960. He participated in the Soyuz 4/Soyuz 5 mission in January 1969, which involved the first ...

Venus, currently traversing Leo, rises around 4:00 A.M. local daylight time (LDT) at 40° N 90° W, preceding sunrise at 6:36 A.M. LDT. By 5:30 A.M. LDT, Venus reaches 15° altitude in the east, with ...

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 ...

Astronomy magazine's Editor Emeritus, Dave Eicher, encourages early morning sky observation during the second week of September. The observation focuses on the Moon's passage near the Pleiades star ...