Ghostly glow in alien skies: ‘Zodiacal light’ possibly spotted on 3 exoplanets

Watch the sun set from a particularly dark patch of Earth and you may spot a triangle of what scientists call zodiacal light extending from where our star passed below the horizon.

Zodiacal light in Earth’s skies is created when sunlight bounces off the dust that fills the solar system, the remains of pulverized asteroids and flurry left by passing comets. And according to new research by a team of astronomers and high school students based in China, a similar phenomenon occurs in the skies of at least a few potentially habitable exoplanets. The light could be one more clue for scientists seeking to puzzle out what those exotic neighborhoods might look like.