We measure the extremely long distances between things in space by light years. A light year is the distance that light travels in one Earth year. Light travels at about 300,000 kilometres per second.

As Imhof noted, “Low Earth orbit, where the International Space Station sits, is orbiting 450 kilometres above us. The Moon ...

The other is research on an approach we call TrapKill, which uses a biomaterial that we are engineering with the hope to make ...

The Universe’s most abundant ice isn’t formless—it’s secretly laced with crystals. And that might change how we think about ...

NASA has confirmed the discovery of an Earth-sized planet parked right in the “habitable zone” of a distant red dwarf star.