A Dance of Galaxies www.nasa.gov/image-articl... These two galaxies are named NGC 4490 and NGC 4485, and they’re located about 24 million light-years away in the constellation Canes Venatici (The Hunting Dogs).

Red Sprites and Circular Elves Lightning over Italy apod.nasa.gov/apod/ap25122... Over the past 50 years, though, other types of upper-atmospheric lightning have been confirmed, including tentacled red sprites and ringed ELVES.

Cyclone Alerts 🌀 Indian Ocean www.nhc.noaa.gov www.metoc.navy.mil/jtwc/jtwc.html

Space Weather Alerts 🌌 Coronal Holes, Geomagnetic Storm, Electron Storm & Galactic Core Storm spaceweather.com www.swpc.noaa.gov/products/ale... www.swift-sgra.com

RED AIRGLOW FILLS DEATH VALLEY LAKE: Death Valley has a lake? It does now. In Nov, extinct Lake Manly came back to life after an atmospheric river passed over California. On Dec.11th, Chris Cook photographed its shallow water reflecting the red sky overhead spaceweathergallery2.com/indiv_upload...

Weather Europe Alerts 🇪🇺 Andorra, Croatia, Estonia, France, Germany, Greece, Iceland, Israel, Italy, Montenegro, Netherlands, Norway, Poland, Spain, Bosnia & Herzegovina www.meteoalarm.org

Weather Canada Alerts 🍁 Alberta, BC, Manitoba, NL, Nova Scotia, Northwest Territories, Ontario, PEI, Quebec, Saskatchewan & Yukon weather.gc.ca

Image of the week: Satellites monitored 24/7 www.eumetsat.int/image-week-s... While most people are off for the holidays, the operations team at EUMETSAT continues their work around the clock

Sunset Solstice over Stonehenge apod.nasa.gov/apod/ap25122... Many cultures mark yesterday's date as a change of seasons -- from autumn to winter in Earth's Northern Hemisphere. The featured image was taken just before the longest night of the 2025 northern year at Stonehenge.

Earthquake Alerts 💥 Papua New Guinea 6.5 earthquake.usgs.gov/earthquakes/...

Cyclone Alerts 🌀 Indian Ocean www.nhc.noaa.gov www.metoc.navy.mil/jtwc/jtwc.html

Space Weather Alerts 🌌 Coronal Holes, Geomagnetic Storm, Electron Storm & Galactic Core Storm spaceweather.com www.swpc.noaa.gov/products/ale... www.swift-sgra.com

Weather Europe Alerts 🇪🇺 Andorra, Croatia, Estonia, France, Germany, Greece, Italy, Montenegro, Netherlands, Norway, Portugal, Slovakia, Spain, Bosnia & Herzegovina www.meteoalarm.org

Weather Canada Alerts 🍁 Alberta, BC, Manitoba, Nova Scotia, Northwest Territories, Nunavut, Ontario, PEI, Quebec, Saskatchewan & Yukon weather.gc.ca

Africa recorded improved control of Ebola, mpox, cholera outbreaks in 2025: Official gazettengr.com/africa-recor... Mr Boum said that despite the progress, Africa continued to face serious health threats, particularly from cholera, diphtheria, and viral haemorrhagic fevers.

Solstice on a Spinning Earth apod.nasa.gov/apod/ap25122... Can you tell that today is a solstice by the tilt of the Earth? Yes. At a solstice, the Earth's terminator -- the dividing line between night and day -- is tilted the most.

Cyclone Alerts 🌀 Indian Ocean www.nhc.noaa.gov www.metoc.navy.mil/jtwc/jtwc.html

Space Weather Alerts 🌌 Coronal Holes, Geomagnetic Storm, Radio Emission & Galactic Core Storm spaceweather.com www.swpc.noaa.gov/products/ale... www.swift-sgra.com

A SOLSTICE ANALEMMA: Other planets have analemmas, too. Not all are figure-8s, however. The shape depends on the tilt of the planet's spin axis and the eccentricity of its orbit around the sun. www.analemma.com/Pages/OtherA... spaceweather.com

A SOLSTICE ANALEMMA: Italian photographer Paolo Bardelli stitched together 48 pictures spanning 12 months to reveal the analemma over Lake Varese. spaceweathergallery2.com/indiv_upload... spaceweather.com

Weather Europe Alerts 🇪🇺 Croatia, Cyprus, Estonia, France, Germany, Italy, Latvia, Moldova, Poland, Portugal, Serbia, Slovakia, Spain, Ukraine, Bosnia & Herzegovina www.meteoalarm.org

Weather Canada Alerts 🍁 Alberta, BC, Manitoba, NL, Nunavut, Ontario, Quebec, Saskatchewan & Yukon weather.gc.ca

#StarTalk: The Science of Replaceable Parts, with Mary Roach www.youtube.com/watch?v=5Jpl... Neil, Chuck & Gary O’Reilly sit down with bestselling author Mary Roach, who discusses her newest book, Replaceable You, and the quest to grow organs, build parts, and engineer the human body.

A supermassive black hole is at the center of every galaxy...but what if it runs away? [via Gizmodo] 🧪🔭🌌⚫🏃 "Black holes are normally housed at the center of their home galaxies. This one, however, was found ~ 230,000 light-years away" gizmodo.com/runaway-blac... #runaway #BlackHole #gravity

Water Droplet Science www.nasa.gov/image-articl... NASA astronaut Don Pettit demonstrates electrostatic forces using charged water droplets and a knitting needle made of Teflon

Peekaboo! www.nasa.gov/image-articl... 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 ISS

NASA Lab Completes Engine Checks on New Aircraft www.nasa.gov/image-articl... Justin Hall, left, controls a subscale aircraft as Justin Link holds the aircraft in place during preliminary engine tests on Friday, Sept. 12, 2025, at NASA’s Armstong Flight Research Center in Edwards, California.

Bassac River, Southern Vietnam www.nasa.gov/image-articl... A camera on the International Space Station captured this Oct. 2, 2025, photo of the Bassac River in Cù Lao Dung, a river islet district in southern Vietnam.

A Siberian Snowman in Billings science.nasa.gov/earth/earth-... Icons of winter are sometimes found in unexpected places. In one striking example, a series of oval lagoons in a remote part of Siberia forms the shape of a towering snowman when viewed from above.

A Subtle Return of La Niña science.nasa.gov/earth/earth-... However, this occurrence of El Niño’s cooler counterpart is relatively weak, and its influence on weather and climate over the next several months remains to be seen.

Image of the week: Ocean colour 2024 www.eumetsat.int/image-week-o... This week’s image shows ocean colour in the Atlantic Ocean in 2024, as monitored by satellites such as the Copernicus Sentinel-3 series operated by EUMETSAT

A Solstice Sun Tattoo apod.nasa.gov/apod/ap25122... Near the December solstice, the Sun's consistent, low arc through northern hemisphere skies, along with low surface temperatures, has left a noticeable imprint on this path to the mountain town of Peaio in northern Italy.

Cyclone Alerts 🌀 Indian Ocean www.nhc.noaa.gov www.metoc.navy.mil/jtwc/jtwc.html

Space Weather Alerts 🌌 Coronal Holes, Radio Emission, Geomagnetic Storm, Electron Storm & Galactic Core Storm spaceweather.com www.swpc.noaa.gov/products/ale... www.swift-sgra.com

A HOLE IN THE SUN'S ATMOSPHERE: Minor G1-class geomagnetic storms are possible on Dec. 24th when the gaseous material arrives. Arctic sky watchers should be alert for Christmas Lights. spaceweather.com

Weather Europe Alerts 🇪🇺 Belgium, Croatia, Estonia, Finland, France, Germany, Hungary, Ireland, Italy, Lithuania, Montenegro, Netherlands, Norway, Portugal, Serbia, Slovakia, Spain, Sweden, Ukraine, Bosnia & Herzegovina www.meteoalarm.org

Weather Canada Alerts 🍁 Alberta, BC, Manitoba, NB, NL, Nunavut, Ontario, Quebec, Saskatchewan & Yukon weather.gc.ca

Long Shadows of the Montes Caucasus apod.nasa.gov/apod/ap25121... When the Moon is at its first quarter phase, the Sun rises along the Montes Caucasus as seen from the lunar surface.

Jupiter and the Meteors from Gemini apod.nasa.gov/apod/ap25121... With each selected exposure registered in the night sky above Alentejo, Portugal, planet Earth, it does look like the meteors are streaming away from Jupiter.

W5: The Soul Nebula apod.nasa.gov/apod/ap25121... Stars are forming in the Soul of the Queen of Aethopia, in the direction of the constellation Cassiopeia, whom Greek mythology credits as the vain wife of a King who long ago ruled lands surrounding the upper Nile river.

Andromeda and Sprites over Australia apod.nasa.gov/apod/ap25121... What’s happening over that tree? Two very different things. On the left is the Andromeda galaxy, an object that is older than humanity and will last billions of years into the future.

Cyclone Alerts 🌀 Indian Ocean www.nhc.noaa.gov www.metoc.navy.mil/jtwc/jtwc.html

Space Weather Alerts 🌌 Coronal Holes, Geomagnetic Storm, Electron Storm & Galactic Core Storm spaceweather.com www.swpc.noaa.gov/products/ale... www.swift-sgra.com

Weather Europe Alerts 🇪🇺 Croatia, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Israel, Italy, Latvia, Lithuania, Montenegro, Netherlands, Norway, Poland, Portugal, Serbia, Slovakia, Spain, Sweden, Ukraine, Bosnia & Herzegovina www.meteoalarm.org

Weather Canada Alerts 🍁 The Atlantics, Quebec, Nunavut, Northwest Territories, Yukon, BC, Alberta, Saskatchewan, Manitoba & Ontario weather.gc.ca

AN ORBITAL HOUSE OF CARDS: If satellite collision-avoidance systems were knocked offline by a major solar storm, a catastrophic collision in low-Earth orbit could occur in as little as 2.8 days spectrum.ieee.org/weve-already... spaceweather.com

#StarTalk ✨ Why Are We Seeing More Frequent Auroras? www.youtube.com/watch?v=LutX... What’s up with the aurora moving south? How does aurora even work? Neil deGrasse Tyson breaks down why people are seeing more aurora activity, what aurora is, the solar cycle, and more!

Should U.S. be worried about AI bubble? news.harvard.edu/gazette/stor...

MARS AND VENUS ARE CONVERGING NEAR THE SUN: The two worlds on Dec. 17th with Mars in front of star cluster NGC 6530 at the same time spaceweather.com/images2025/1... spaceweather.com

spaceweathergallery2.com/indiv_upload... in-the-sky.org/comets/20251... spaceweathergallery2.com/submissions/... spaceweather.com