Astronomy

Ice core records of atmospheric hydrogen reveal a huge rise in concentration since the Industrial Revolution which has contributed to global warming – and could sway the debate over hydrogen as a fuel

In a move that’s concerning astronomers and environmental groups alike, the Federal Communications Commission (FCC) has proposed reducing environmental oversight of space-based operations.

The post Environmental Exclusions Proposed for U.S. Satellite Industry appeared first on Sky & Telescope.

In this infrared photograph, the Optical Communications Telescope Laboratory at JPL’s Table Mountain Facility near Wrightwood, California, beams its eight-laser beacon to the Deep Space Optical Communications flight laser transceiver aboard NASA’s Psyche spacecraft.

Annotating the margins of books is an important part of deep reading and has a long legacy of merit in both science and literature

Data from more than 18,000 people suggests that where excess fat is stored in the body influences its effects on brain structure, activity and health

Data from more than 18,000 people suggests that where excess fat is stored in the body influences its effects on brain structure, activity and health

Week in images: 15-19 September 2025

Discover our week through the lens

It’s a crowded galaxy, the latest exoplanet tally shows

Gauging the mass of a black hole is tricky, but astronomers have devised multiple methods to measure the heft of these galactic gluttons

For the first time, researchers have mathematically proven that a quantum computer can solve a particular task faster than an ordinary computer, in a way that can never be beaten

For the first time, researchers have mathematically proven that a quantum computer can solve a particular task faster than an ordinary computer, in a way that can never be beaten

Linguist Adam Aleksic explains how viral slang and algorithm-driven speech aren’t destroying language––they’re accelerating its natural evolution.

Hidden beneath the biggest ice mass on Earth, hundreds of subglacial lakes form a crucial part of Antarctica’s icy structure, affecting the movement and stability of glaciers, and consequentially influencing global sea level rise.

Thanks to a decade of data from the European Space Agency’s CryoSat satellite, researchers have identified 85 previously unknown lakes several kilometres under the frozen surface surrounding the South Pole. This increases the number of known active subglacial lakes below Antarctica by more than half to 231.

On these dark evenings the Perseus Double Cluster and the Andromeda Galaxy, M31, await in the northeast. They're only two fist-widths apart.

The post This Week's Sky at a Glance, September 19 – 28 appeared first on Sky & Telescope.

Image: This Copernicus Sentinel-2 image captures a cloud-free view over the island of Komodo in southeastern Indonesia.

The steerable 60 foot diameter dish antenna of the

Sometimes, it seems as if the Universe is literally smiling down upon us. If skies are clear this coming Friday September 19th, be sure to wake up early to catch a bizarre celestial scene as Venus, Regulus and the slim crescent Moon huddle together in the eastern dawn. This triple play is a complicated one, evolving one of the best conjunctions for 2025.