Dragonflies have evolved special light-sensing proteins that let them see deeper red light than most animals. Researchers have now discovered that the mechanism of red vision is shared with humans and ...

A team of U.S. and U.K. researchers has outlined a new way to detectalien moons by tracking subtle flashes of reflected light during lunar eclipses in distant planetary systems. The method, designed ...

“There is no dark side of the moon, really. Matter of fact, it’s all dark.” —Pink Floyd With my apologies to Roger Waters, who wrote those lyrics, there is a dark side of the moon. And sometimes it’s ...

Reflections cast by a growing number of satellites orbiting the Earth could ruin more than 95% of images taken by some space telescopes in the next decade, according to a NASA-led study. The reflected ...

In about a year, a new NASA instrument designed and built in Colorado will ride on the International Space Station (ISS). From there, it will look down at Earth to measure the light reflecting off our ...

The company is seeking F.C.C. approval to test an idea to reflect sunlight to Earth at night, possibly powering solar panels. Critics say it could be bad for people and wildlife. By Kenneth Chang and ...

A celebrated experiment in 1801 showed that light passing through two thin slits interferes with itself, forming a characteristic striped pattern on the wall behind. Now, physicists have shown that a ...