Astronomy

Astronomers using data from the Hobby–Eberly Telescope Dark Energy Experiment (HETDEX) have discovered tens of thousands of gigantic hydrogen gas halos, called “Lyman-alpha nebulae,” surrounding galaxies 10 billion to 12 billion years ago.

The White House has nominated Erica Schwartz to replace NIH director Jay Bhattacharya as CDC chief. Bhattacharya has been leading the CDC on an acting basis since February, after the public health agency’s director was fired in 2025

Astronauts Reid Wiseman, Victor Glover, Christina Koch and Jeremy Hansen reflected on the highs and lows of their moon mission—the first of its kind in more than 50 years

The HHS secretary defended proposed budget cuts to science, his vaccine moves and health care costs on Capitol Hill on Thursday

A new study suggests a proto–Colorado River filled a large basin before spilling westward to set the Grand Canyon’s modern path

A new map of the cosmos, including more than 47 million galaxies and other cosmic objects, represents one of the most extensive surveys of our universe ever conducted

Engineers love a good practical challenge, especially when it comes to spaceflight. But there’s one particular challenge facing the crewed missions of the near future that scares mission planners above almost all others - fire. For decades, we’ve relied on a NASA test known as NASA-STD-6001B to screen material flammability for flight. But space is much more complicated than an Earth-bound test provides for. A new paper from researchers at NASA’s Glenn Research Center and Johnson Space Center and Case Western Reserve University details a planned mission to test the flammability of materials on the Moon’s surface - where they expect flame to act much differently than it does here on Earth.

Some 60 million light-years away in the southerly

A Hungarian refugee who came to the U.S. with nothing but a diploma made a breakthrough discovery in the burgeoning field of neurochemistry

A first-of-its-kind observation shows how jets from voracious black holes can shape the growth of galaxies

Steve Brusatte, author of The Rise and Fall of the Dinosaurs and The Story of Birds, recommends 10 dinosaur books to dig into

A portion of the Moon’s far side is seen along the terminator—the boundary between lunar day and night—where low-angle sunlight casts long shadows across the surface.

Artemis II’s crew went farther from humanity than anyone has been before. Here’s how one scientist determined whom, specifically, they were farthest from

To say NASA has been undergoing some massive administrative changes lately is a huge understatement. One of the more concerning ones, according to a new paper at the 57th Lunar and Planetary Science Conference by Ari Koeppel and Casey Dreier of the Planetary Society, is the trend towards the Silicon Valley mindset of “move fast and break things” - which they argue doesn’t work very well when it comes to producing valuable science.

The crew of Artemis 2 reported six flashes of light while passing behind the Moon. We've seen those kinds of flashes before.

The post What Were the Flashes That Artemis 2 Astronauts Saw? appeared first on Sky & Telescope.

These drugs were hailed by proponents as breakthroughs in the fight to treat Alzheimer’s disease, but a new independent review finds they make “no meaningful difference”

People who are terminally ill are commonly reunited with lost loved ones in their dreams and have visions of doors, stairways and light, which are said to help them accept the dying process

People who are terminally ill are commonly reunited with lost loved ones in their dreams and have visions of doors, stairways and light, which are said to help them accept the dying process

Three Earth observation satellites, developed by the European Space Agency (ESA) with European partners, and due to launch later this year, have completed their functional and environmental tests and are ready to travel to the European spaceport in French Guiana. But first, journalists were invited to have one last look.

The Lyrid meteor shower will soon hit its peak. Here's how to spot it, including by using the New Scientist stargazing companion