Stefanie Waldek

The winter solstice is today (Dec. 21), marking the official start of astronomical winter in the Northern Hemisphere and the shortest day of the year.

Tidal interactions are pulling the exoplanet toward its demise: a fiery collision with its star.

NASA has canceled the GeoCarb mission, which was a greenhouse gas–monitoring satellite into geostationary orbit.

Scientists reexamining the James Webb Space Telescope's iconic "Cosmic Cliffs" image of the star cluster NGC 3324, have spotted a rare sight: protostars emitting two dozen powerful jets and outflows.

The Geminid meteor shower will peak overnight tonight (Dec. 13 and Dec. 14), producing anywhere from 60 to 120 meteors per hour.

After eight years of science missions, the Stratospheric Observatory for Infrared Astronomy (SOFIA) aircraft has found permanent residence at the Pima Air & Space Museum in Arizona.

The super-Earth exoplanet Janssen is so close to its star, a year is only 18 hours long.

On Mars, dust devils can have both positive and negative impacts on robotic exploration on the planet.

ESO's Visible and Infrared Survey Telescope for Astronomy gives us a peek at the action inside the stellar nurseries.

NASA's Lunar Flashlight mission will deploy a small satellite to skim the moon's surface and use lasers to search for water ice in lunar craters.

Archival images from the Hubble Space Telescope have revealed an infant supernova photographed just hours after the star's explosion 11.5 billion years ago.

New research indicates that certain areas of the Martian crust have a higher silica content than expected, upending the long-held theory that the crust is uniformly basaltic.

Catch Saturn making a close approach of the moon in its first quarter phase on Tuesday (Nov. 1).

The boundary between the heliosphere and the interstellar medium appears to be moving in an unexpected manner.

A newly processed image, comprising 41 observations by NASA's retired Cassini mission, provides insights into the origins of Saturn's rings.

The Hubble Space Telescope observed the aftermath of astronomers' first-ever neutron star collision and measured how fast the jet produced traveled.

The asteroid Phaethon's rotational period is decreasing, which is rare for space rocks.

Across the United States, the moon and Saturn will appear to be close neighbors for a good portion of the night.

The NASA-USGS Landsat 9 satellite spotted an eruption at the Home Reef seamount in the Tonga Islands that produced a small island.

Amateur astronomers can help verify discoveries by NASA's Transiting Exoplanet Survey Satellite.

Since 2014, SOFIA has been cruising through the night skies around the world, looking at the cosmos, but that mission ends this week.

On Monday (Sept. 26) at 7:14 p.m. EDT (2314 GMT), if all goes well, DART will crash into Dimorphos in an attempt to alter the moonlet's trajectory.

The blobs are irregular groups of young blue stars thought to have formed in a galactic collision that scientists liken to a belly flop.

The Virtual Telescope Project will attempt to show DART's impact through its network of ground-based telescopes.

You have to look for the clues that the protoplanet exists, not for the protoplanet itself.