Expert Voices

Mercury is so strange that astronomers have not been able to explain its properties with simulations of the solar system's formation. But now, researchers have found an important clue.

In spaceflight, we advance by learning from our mistakes — if, that is, we accept the learning we gain from those failures and apply it to our future endeavors.

The Air Force general overseeing North American airspace refused to rule out extraterrestrial forces at play after unidentified objects were shot down in February.

Scientists and government agencies have been worried about the space junk surrounding Earth for decades. But humanity's starry ambitions are farther reaching than the space just around Earth.

On Jan. 31, 2023, Boeing completed its last 747, the airplane that helped make international air travel affordable.

A rotating universe would be capable of rotating your future into your own past, allowing you to travel back in time.

Want to become a published astronomer? All it takes is a spare telescope, or at least a decent internet connection, and plenty of patience.

The European Space Agency (ESA) recently announced a new mission of its science program: a small telescope orbiting the Earth dubbed Arrakhis.

The accelerator at FRIB started working at low power, but when it finishes ramping up to full strength, it will be the most powerful heavy-ion accelerator on Earth.

The important stuff, if mentioned at all, wasn't part of the build-up to the Artemis story about NASA finally returning to the moon after 50 years or so.

There's an awkward, irksome problem with our understanding of nature's laws that physicists have been trying to explain for decades.

On a dark night, away from the city lights, you can see the stars in the same way as your ancestors did centuries ago.

Is blue the true color of the sky, or the only color of the sky? It's complicated.

The central objective of the Paris Agreement is to limit Earth's warming to well below 2 degrees Celsius above pre-industrial levels, but preferably below 1.5 degrees.

American scientists have announced what they have called a major breakthrough in a long-elusive goal of creating energy from nuclear fusion.

How does a stunning photo from Artemis 1 compare to other iconic views of Earth from the outside?

48,000 academic workers across California are fighting for higher wages and workplace protections.

The astronauts of NASA's Apollo 17 spacecraft, the last crewed mission to the moon, took a photograph of Earth and changed the way we visualized our planet forever.

Albert Einstein's theory of general relativity has been remarkably successful in describing the gravity of stars and planets, but it doesn’t seem to apply perfectly on all scales.

The collapse of the world's most powerful radio and radar telescope didn't kill off science at the Arecibo Observatory, but the National Science Foundation might.