“...all the past is but a beginning of a beginning, and that all that is and has been is but the twilight of dawn.”

— H.G. Wells
1902

Astronomy

Galileo L14 liftoff on Ariane 6

ESO Top News - Wed, 12/17/2025 - 12:02am
Video: 00:01:06

On 17 December, two new Galileo satellites lifted off from Europe’s Spaceport in French Guiana aboard an Ariane 6 rocket. This marked the 14th launch for Europe’s satellite navigation operational satellite programme, reinforcing Europe’s resilience and autonomy.

The European Space Agency (ESA) is responsible for carrying out the Galileo launch with Arianespace on behalf of the European Commission. The Galileo satellites were manufactured by OHB, under contract with ESA. Once in orbit, the EU Agency for the Space Programme (EUSPA) will bring the satellites into service and oversee their operation.

The flight, designated VA266, was the first launch of Galileo satellites on Europe’s newest heavy-lift launcher Ariane 6.

Follow the launch campaign

Access the related broadcast quality video material

Categories: Astronomy

Ancient Bees Burrowed Inside Bones, Fossils Reveal

Scientific American.com - Tue, 12/16/2025 - 7:05pm

Bones of now extinct species became a haven for bee babies thousands of years ago, scientists report in a first-of-its-kind discovery

Categories: Astronomy

Scientists Map the Sun’s Magnetic “Surface”

Sky & Telescope Magazine - Tue, 12/16/2025 - 1:41pm

Where does the Sun end and the solar wind begin? Scientists have mapped the dynamic magnetic edge that bounds our star.

The post Scientists Map the Sun’s Magnetic “Surface” appeared first on Sky & Telescope.

Categories: Astronomy

Peekaboo!

NASA Image of the Day - Tue, 12/16/2025 - 12:31pm
Clockwise from left, JAXA (Japan Aerospace Exploration Agency) astronaut Kimiya Yui and NASA astronauts Jonny Kim, Zena Cardman, and Mike Fincke pose for a playful portrait through a circular opening in a hatch thermal cover aboard the International Space Station on Sept. 18, 2025.
Categories: Astronomy, NASA

The Arctic Is in Dire Straits, 20 Years of Reporting Show

Scientific American.com - Tue, 12/16/2025 - 12:08pm

The Arctic has changed dramatically in the past 20 years, a new report shows, as temperatures skyrocket and ice rapidly melts

Categories: Astronomy

Harsh Flu Season May Be Driven by New Variant K

Scientific American.com - Tue, 12/16/2025 - 12:05pm

A novel influenza variant called subclade K appears to be driving an uptick in cases and hospitalizations throughout the U.S. and other countries

Categories: Astronomy

The First Alien Civilization We Encounter Will Be Extremely Loud

Universe Today - Tue, 12/16/2025 - 12:02pm

When we gaze up at the night sky, we assume that what we're seeing is a representative population of similar stars at similar distances. But it's not. The stars we see are a mixture of massive and small, distant and near. In fact, we can't even see our closest neighbour, Proxima Centauri. We see these stars because they have large observational signals, and that illustrates one of the problems in astronomy.

Categories: Astronomy

The Horsehead Nebula

APOD - Tue, 12/16/2025 - 12:00pm

Sculpted by stellar winds and radiation, this dusty interstellar


Categories: Astronomy, NASA

RFK, Jr.–Backed Lyme Disease Conspiracy Theory May Be Probed under New Bill

Scientific American.com - Tue, 12/16/2025 - 12:00pm

President Donald Trump is expected to sign a defense bill this week that orders an investigation into whether the U.S. military bioengineered Lyme disease

Categories: Astronomy

The Nancy Grace Roman Space Telescope Will Teach Us A Lot More About Cosmic Voids

Universe Today - Tue, 12/16/2025 - 10:47am

The Large-Scale Structure of the Universe features massive filaments where galaxy clusters and superclusters reside. In between these filaments are cosmic voids, vast regions that are nearly empty. The Nancy Grace Roman will map and study 80,000 of these voids to place constraints on Dark Energy drives the expansion of the Universe.

Categories: Astronomy

First image from Sentinel-6B extends sea-level legacy

ESO Top News - Tue, 12/16/2025 - 9:00am

Copernicus Sentinel-6B, launched last month, has reached its orbit and delivered its first set of data, which show variations in sea level in the North Atlantic Ocean. This data underlines how the mission will continue to strengthen the long-term reference record of sea levels, a key parameter of climate change.

Categories: Astronomy

Scientists Devise New Plan to Study the Most Exciting Rock on Mars

Scientific American.com - Tue, 12/16/2025 - 8:00am

New laboratory studies could shed light on a rock containing potential signs of alien life that’s stranded on Mars

Categories: Astronomy

Math Puzzle: Wrangle the Rectangles

Scientific American.com - Tue, 12/16/2025 - 8:00am

Sort out a rectangle tangle in this math puzzle

Categories: Astronomy

How to See Interstellar Comet 3I/ATLAS as It Swings by Earth One Last Time

Scientific American.com - Tue, 12/16/2025 - 7:00am

This week marks the last chance for backyard astronomers to see interstellar Comet 3I/ATLAS before it races on its journey back to outer space

Categories: Astronomy

Astronomers Snap a Rare Photo of a Super-Jupiter with Two Suns

Universe Today - Tue, 12/16/2025 - 6:48am

If you read enough articles about planets in binary star systems, you’ll realize almost all of them make some sort of reference to Tatooine, the fictional home of Luke Skywalker (and Darth Vader) in the Star War saga. Since that obligatory reference is now out of the way, we can talk about the new “super-Jupiter” that researchers from two separate research teams, including one at Northwestern University and one at the University of Exeter, simultaneously found in old data from the Gemini Planet Imager (GPI).

Categories: Astronomy

Crash clock says satellites in orbit are three days from disaster

New Scientist Space - Cosmology - Tue, 12/16/2025 - 6:30am
Satellites in orbit would begin to collide in a matter of days if they lost manoeuvrability during a solar storm or other outage
Categories: Astronomy

Crash clock says satellites in orbit are three days from disaster

New Scientist Space - Space Headlines - Tue, 12/16/2025 - 6:30am
Satellites in orbit would begin to collide in a matter of days if they lost manoeuvrability during a solar storm or other outage
Categories: Astronomy

These Orcas Are on the Brink—And So Is the Science That Could Save Them

Scientific American.com - Tue, 12/16/2025 - 6:00am

Inside the desperate rush to save the southern resident killer whales

Categories: Astronomy

Global Warming Could Skew Reptile Sex Ratios and Lead to Extinctions

Scientific American.com - Tue, 12/16/2025 - 6:00am

The sex of many turtles, crocodilians, and other reptiles is determined by the temperature at which their eggs incubate. Global warming could doom them

Categories: Astronomy

Heart and Kidney Diseases, plus Type 2 Diabetes, May Be One Illness Treatable with Ozempic-like Drugs

Scientific American.com - Tue, 12/16/2025 - 6:00am

These three disorders could really be “CKM syndrome,” which can be treated with drugs like Ozempic

Categories: Astronomy