A rocky exoplanet outside the Earth's solar system may have an atmosphere, according to new evidence gathered by NASA ...

NASA’s Chandra Observatory has produced vivid, energy-segmented X-ray maps of galaxy clusters, revealing shock waves, cooling ...

NASA’s Chandra telescope uses a new X-arithmetic method to compare X-ray energies and show how supermassive black holes shape galaxy clusters and galaxy groups, revealing differences in gas movement a ...

The X‑arithmetic technique offers a powerful new way to map the physics of other galactic structures across the universe and ...

Sunspot AR3663 erupted with powerful X1.6 and M4 solar flares. NASA's Solar Dynamics Observatory captured the fireworks.

For the first time, scientists have made a clear X-ray detection of chlorine and potassium in the wreckage of a star using ...

An important part of data collection for the United States space program, the North American X-15 had astonishing performance ...

The McDonald Douglas X-36 was a groundbreaking, remotely piloted research aircraft developed in the 1990s through a collaboration between NASA and McDonnell Douglas. Its primary objective was to ...

A new feature on X has stirred confusion, anger and a wave of online sleuthing after users discovered that the platform was suddenly displaying the surprising locations where certain accounts are ...

NASA has revealed more detail about the recent first flight of its X-59 Quesst supersonic demonstrator jet, a milestone the agency describes as demonstrating its continued ability to manage ...

Securing this volume through 2030 means rocket fueling, propulsion tests and aeronautics experiments won’t miss a beat. It also underscores U.S. leadership in clean ammonia and hydrogen ...

You'll soon be able to see more information about X accounts, including where they're based and how many times they've changed their usernames. X is rolling out a new feature called "About this ...