In 1978, NASA scientist Donald Kessler warned that orbital debris could trigger a runaway cascade of collisions, turning low Earth orbit into an unusable battlefield of shrapnel. Today, with mega ...

But this is not an emergency situation, agency officials stress. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Breaking space news, the latest ...

NASA said Thursday that it will bring four astronauts aboard the International Space Station back to Earth more than a month earlier than planned because of a medical issue — the first such evacuation ...

PHOENIX — A billionaire-backed philanthropic organization is funding the development of a series of new observatories, including a space telescope larger than Hubble that its backers say can be built ...

Eric and Wendy Schmidt are backing a start-up-like approach to building a giant space telescope and powerful ground observatories. By Kenneth Chang Kenneth Chang reported on the unveiling of Schmidt ...

Here’s what you’ll learn in this story: Time might actually have 3 dimensions. But it also means that the space would actually be one-dimensional, instead of the three dimensions we’re familiar with.

JWST peered at the glowing trail of stars left behind by a candidate runaway supermassive black hole deep in space, revealing new insights after other telescopes looked at the event. When you purchase ...