Sputnik 2 was launched by the Soviets shortly after Sputnik 1, with its rapid preparation intended to sustain propaganda momentum and align with the 40th anniversary of the Bolshevik Revolution. This ...

PBS's NOVA will present "Operation Space Station," a two-part special premiering November 5 and 12, documenting 25 years of continuous human habitation on the International Space Station (ISS) through ...

Comet C/2025 A6 (Lemmon) is currently visible in both morning and evening skies, initially located near the Big Dipper within Canes Venatici before transitioning into Boötes. Its perigee, the closest ...

On October 14, 1947, Captain Chuck Yeager piloted the Bell X-1 aircraft, "Glamorous Glennis," achieving a speed of Mach 1.06. This flight disproved prevailing expert warnings that exceeding Mach 1 ...

Multiple planetary observations are detailed, including a dual shadow transit of Io and Europa on Jupiter's cloud tops (visible on the U.S. West Coast), an occultation of Io by Jupiter's shadow, and ...

Interim NASA Administrator Sean Duffy announced the reopening of the Human Landing System (HLS) contract for the Artemis 3 lunar landing mission. This decision arises from concerns regarding SpaceX's ...

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

Comet C/2025 A6 (Lemmon) is currently a 5th-magnitude object, with predictions for it to brighten by two to six times, potentially allowing naked-eye observation from dark sites. Its closest approach ...

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involving current interim administrator Sean Duffy and Jared Isaacman, whose prior nomination was unexpectedly withdrawn ...

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 ...

The Pleiades (M45), a 100-million-year-old open cluster containing approximately 500 stars located 380 light-years from Earth, is observable high in the east by 10 P.M. local daylight time.

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 ...