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 ...

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 ...

On October 25, Saturn's moon Iapetus reaches inferior conjunction, positioned 1.3′ north of Saturn and shining at approximately 11th magnitude, making it easier to observe near its parent planet.

Researchers simulated Martian permafrost and ice cap conditions in a laboratory, exposing *Escherichia coli* samples in pure water ice and water-sediment mixtures to cosmic radiation equivalent to 50 ...

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.

Astronomers have detected the first tidal disruption event (TDE), designated AT2024tvd, occurring 2,600 light-years outside its host galaxy's core, exhibiting intense, rapidly evolving radio signals.

The emerging subdiscipline of "astroimmunology" has been formalized, focusing on understanding how spaceflight stressors significantly compromise the human immune system. A new guide, published in ...

On October 22, the Moon will achieve two close conjunctions, passing 5° south of Mars and 2° south of Mercury, before reaching its orbital apogee at 406,445 km (252,553 miles) from Earth. Observers ...