A bright white core of a dead star distorts the light of the sunlike star it orbits, as seen here in an artist’s illustration. It’s the first strong evidence for this gravitational lensing in a binary star system.
Astronauts aboard the International Space Station toast people back home with water recycled from their urine. A new system not only would turn pee into drinking water but also produce energy.
The expanding shell of gas shown here, called Abell 33, glows blue. It’s the remnant of a dying star. The bright star that appears to sit on the ring’s edge actually is nowhere near that shell of gas.
Fires cause billions of dollars of destruction to homes and forests every year. But not all fires are bad, especially for forests. With a better understanding of fire, scientists can both help people prevent dangerous fires — and identify which ones it would be better to let burn.