Off-Earth is an extension of her 2017 podcast, Making New Worlds, which asked ethical questions about space settlement. The book takes some of the same questions and expands on them.

A stunning green aurora shimmers over Earth, with the International Space Station in the foreground. (Image credit: NASA/ Josh Cassada) When seen from Earth, auroras are nothing short of dazzling.

5,400-Pound NASA Satellite Falls Back to Earth After 38 Years in Space Amanda Kooser Freelance writer Amanda C. Kooser covers gadgets and tech news with a twist for CNET.

Miles of air cover Earth. The boundary between Earth's atmosphere and outer space , the Kármán line, is about 62 miles (100 kilometers) above the planet's surface.

I was in awe of the idea of space travel and was told in order to pursue a career in that field, I would need to have a strong math background. As a result, math became my favorite subject.

A defunct, Soviet-era spacecraft is falling back to Earth uncontrolled, but experts say there’s little cause for alarm. The half-ton craft, known as Kosmos-482, was designed to land on Venus but ...

Euclid’s new Einstein ring. The Einstein ring that Euclid spotted is located in the galaxy NGC 6505.It is only a hop, skip, and a jump away from Earth at 590 million light-years away.

Massive ripples in the very fabric of space and time wash over Earth constantly, although you'd never notice. An astrophysicist is trying a new search for these gravitational waves.