Göbekli Tepe, a 12,000-year-old site in southern Turkey (potentially older in parts), predates known agricultural societies and displays complex megalithic structures, challenging existing theories ...

(Editor’s note: The author of this article is one of the authors of a new paper on Planet Nine, which you can read here. It has been accepted for publication in The Astrophysical Journal Letters.) In ...

UPDATE 8/28/24: After pushing back the initial launch from Tuesday to Wednesday this week to check a helium leak in the launch system, SpaceX once again delayed Polaris Dawn’s launch, citing poor ...

The First Quarter Moon is scheduled for October 28 at 12:21 P.M. EDT, presenting its terminator halfway across the visible lunar disk. During this lunar phase, observers can distinguish maria and ...

Star formation begins with protostars in cold molecular clouds, where gravitational contraction precedes nuclear fusion, and their early evolutionary stages are best characterized through ...

Interstellar Comet 3I/ATLAS will reach perihelion, its closest approach to the Sun, on October 30, 2025, marking the climax of its brief, hyperbolic trajectory through our solar system before its ...

On October 23, the Moon will pass 0.5° south of Antares, observable low in the southwest approximately 40 minutes after sunset, potentially revealing earthshine and Mare Crisium with binoculars.

Comet C/2025 A6 (Lemmon) unexpectedly continued to brighten past its predicted peak on October 21, achieving an estimated 4th magnitude. Despite its brightness, increasing lunar illumination ...

Mars was a very different place as a young planet. Liquid water dotted the Red Planet’s landscape with lakes and rivers. But the planet’s climate changed drastically in the past few billion years.

On October 27th, Jupiter will be observable south of Pollux in Gemini at magnitude –2.2, with East Coast observers having the opportunity to witness an occultation of its moon Io between approximately ...

Saturn is visible only briefly in early February, but its rings are nearly edge-on. Venus is bright and easily visible throughout February, changing in phase and apparent size. Jupiter shows its moons ...

Light pollution reduction (LPR) filters function by selectively blocking specific wavelengths of light emitted by certain artificial sources, such as high-pressure sodium streetlights, which ...