Galaxies

High-energy photons from the Milky Way’s core suggest dark matter may soon be found by the world's most powerful particle accelerator

A vast region of space colder than expected is also largely devoid of galaxies, and the two observations are no coincidence. Clara Moskowitz reports

Controversy swirls around a bold proposal for a bigger, better—and expensive—replacement for NASA’s premier space telescope

Two prominent scientists update our view of the history of life on Earth, featuring the prominent roles of oxygen and carbon dioxide, and question claims that it is fairly easy to initiate life—even on a planet such as ours

On April 30, if all goes well, after running out of fuel to fight off orbital decay NASA’s long-running MESSENGER spacecraft will end its mission to Mercury by crashing into the planet’s surface at nearly 4 kilometers per second.

Scientists and astronauts recall the telescope’s finest hours as well as threats to its 25-year existence
 

The telescope’s chief scientist started work on the project in 1972, garnering support for the world's first telescope free of Earth's atmosphere's blurring effects

Imagine a trio of aerobatic aircraft. Over the years they've gotten very good at their routine. But they want to add another five or six or seven members.

Astronomers watching galaxies collide found evidence of nongravitational forces that could suggest dark matter interacts with itself
 

A recent article by Samuel Arbesman in the science magazine Nautilus discusses the extraordinary sounding possibility that – just perhaps – a search for extraterrestrial intelligence could be made by looking at our DNA.

The American Physical Society is holding its annual April Meeting at the moment in Baltimore, Maryland, and one of the highlights, research-wise, comes to us courtesy of the Dark Energy Survey (DES) collaboration.

Green as a color can mean animal, vegetable or mineral. It is the stuff of crocodiles, chlorophyll and copper patina, the essence of serpentine or of snakes in the grass, the hue of a glacial lake, a stagnant pond and the Chicago River on St.