Thursday, September 10, 2026

Unexplained Gamma-Rays from the Galactic Center Could be from Self-Annihilating Dark Matter

Superimposed over this Fermi image of the Milky Way is the Galactic Center Excess (GCE), an unexplained excess of gamma radiation coming from the galaxy's center. The Fermi Gamma-ray Space Telescope first detected the GCE in 2009, and astronomers have been puzzling over its source ever since. Dark matter can't be ruled out. Image Credit: NASA Goddard/A. Mellinger (Central Michigan Univ.) and T. Linden (Univ. of Chicago)

Over a decade ago, the Fermi satellite detected an excess of gamma-ray emissions in the galactic center. Potential explanations included Sgr. A*, the Milky Way's SMBH, pulsars, and even self-annihilating dark matter. There's no clear answer yet, since the region is so difficult to observe. But recent research shows that dark matter can't be ruled out.



Ancient Swedish Goths Had Surprisingly Accurate Calendars

Scandinavian Goth on his horse. Credit: Wikipedia

Ancient Swedish pagans had surprisingly accurate calendars and the ability to measure phases of the Moon to an incredible precision.



Wednesday, September 9, 2026

New Revelations About the Origin of Interstellar Comet 3I/ATLAS

3I/ATLAS photographed in color by the Gemini North telescope on 26 November 2025. Credit: International Gemini Observatory/NOIRLab/NSF/AURA/B. Bolin.

UK astronomers have uncovered new clues about the origin of 3I/Atlas – only the third known object from beyond our Solar System ever spotted in our cosmic neighbourhood.



New Research Says that Early Galaxies Could be Sending us Neutrinos

This image shows 15 of the 341 hitherto identified “little red dot” galaxies discovered in the distant Universe by JWST. These galaxies all exhibit similar features, but only exist very early on in cosmic history; there are no known examples of such galaxies close by or at late times. Credit: D. Kocevski et al. (2025)

Those "Little Red Dots" discovered by the James Webb Space Telescope, galaxies that existed during the very early Universe, could be sending neutrino particles that are reaching us today.



Astronomers Unmask a Supernova Impostor

This artist's illustration shows a massive star exploding as a supernova at the end of its life. Supernovae often emit telltale outbursts before they explode, and that's what astronomers thought they found coming from one massive star. But as it turns out, it was an impostor. Image Credit: NASA, ESA, NSF's NOIRLab, Mark Garlick, Mahdi Zamani

Astronomers observe faint light signals from stellar objects, study it intently, and try to understand what's behind these signals. In one case, the signals they detected masqueraded as an imminent supernova explosion. But more observations revealed a different reality.



Next-Gen Gravitational Wave Detectors Could Spot the First Black Holes

Artist's impression of the early universe. Credit - ESA/Hubble, M. Kornmesser

A few hundred million years after the Big Bang, the first stars ignited - literally the “let there be light” moment for the universe. Now known to astronomers as Population III, or Pop III, stars, these giants were very different from the stars we know today. They were formed out of pristine hydrogen and helium, with almost no “metal” (i.e. other elements) holding them back. They were also huge, growing to tens to hundreds of times larger than the Sun. And they died young, in many cases collapsing into the universe’s earliest black holes. Some of those black holes even partnered up, eventually colliding into one another and creating gravitational waves that, if we have instruments sensitive enough, we could potentially detect. A new study led by astrophysicist N.V. Krishnendu of the University of Birmingham and their colleagues shows just how much we can learn about them with the new suite of gravitational detectors about to come online.



Tuesday, September 8, 2026

Japan's Hayabusa2 Achieves First-Ever Laser Ranging Experiment with an Asteroid

Artist's impression of Hayabusa2 firing its ion thrusters. Credit: DLR German Aerospace Center

On Sunday July 5th, 2026, the Japan Aerospace Exploration Agency (JAXA) achieved the first-ever successful laser ranging experiment while making a flyby of an asteroid.