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The Sun seems unchanging, but solar flares, prominences, and sunspots often pop up and disappear. Safely observing the Sun can be both fun and rewarding.

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 ...

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 ...

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 ...

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 ...

China is preparing for the Shenzhou-21 crewed mission, targeting the Tiangong space station. The mission's launch, utilizing a Long March-2F carrier rocket from the Jiuquan Satellite Launch Center, is ...

A leadership contest for the permanent NASA administrator position is underway, involving current interim administrator Sean Duffy and Jared Isaacman, whose prior nomination was unexpectedly withdrawn ...

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

Guidance is provided for observing the planet Mercury. Optimal viewing is specified as shortly after sunset, with Mercury positioned low in the western sky. Binoculars are recommended as an aid, ...

Jupiter will be observable in Gemini, passing 7° south of Pollux at 11 A.M. EDT, with a visual magnitude of –2.2. The prominent stars Pollux and Castor are described, with Pollux noted as a magnitude ...

The Saturn I rocket, developed by Wernher von Braun's team since 1957, was designed to facilitate American lunar ambitions, integrating components and reusing hardware from existing missile ...