Expert Voices

Physicists are figuring out how close you can get to a black hole before you are unlikely to escape. That threshold is called the innermost stable circular orbit (ISCO).

Space exploration technologies have already helped benefit Earth in many ways, especially when it comes to communications, Earth observation and even fostering economic growth.

Almost as interesting as what they knew, however, is what they did not know.

Around the planet, a loosely knit but closely woven band of amateurs monitor the whereabouts of satellites — be they secretive spacecraft, rocket stages, orbital debris or lost space probes.

Magnetars — highly magnetized, rapidly rotating super-dense stars — are among the most enigmatic creatures to inhabit the cosmos and their origins are shrouded in mystery.

Researchers at Los Alamos National Laboratory recently developed and demonstrated the ability to stop and restart solid rocket motors many times — something that has never been done before.

Hubble's infrared eyes provided new major capabilities.

Our satellites in space gathering data and images of our home planet unite us in ways that are more important now than ever.

A conspiracy theory claiming 5G can spread the coronavirus is making the rounds on social media. Peddling such misinformation is not only wrong, it's destructive.

The fact that we are here at all is one of the greatest puzzles of physics.

The sun is a roiling, boiling ball of plasma, constantly churning and turning itself inside out.

Robust funding of space telescopes can help humanity settle the final frontier.

This year's first supermoon will potentially grace the sky on February 9.

Did plants and trees survive when the dinosaurs were wiped out?

Pearl Jam's new record, 'Gigaton,' moves listeners beyond Earthly bounds to reflect on our changing planet.

Machines could fulfill desires and support humans during space travel.

As far as cosmologists can tell, the mysterious force behind the accelerated expansion of the universe, a force that we call dark energy, remains constant. But it may not have done so in the past.

All four outer planets in our solar system sport at least a few rings, but so far, we haven't observed any such features around exoplanets. That's confusing.

String theory is a purported theory of everything that physicists hope will one day explain … everything.