The iridescent cloud reveals new clues about ice formation in the Martian atmosphere (no little green men, sorry).

At the surface, Mars is a desolate, barren world with a rocky landscape, massive dust storms and extreme temperature swings.

“When it’s brightest, Venus appears as an eerily eye-catching beacon,“ EarthSky wrote. ”Many mistake it for a UFO. It’s ...

"I'll always remember the first time I saw those iridescent clouds and was sure at first it was some color artifact." ...

The "parade of planets" in the evening sky continues. Starting the evening of Feb. 22, Mercury will join the lineup but it ...

Locals fear the “green rush” will result in even more extreme concentration of land ownership in a warming world.

The phenomenon of twilight clouds was first observed on Mars in 1997 during NASA’s Pathfinder mission. However, it wasn’t ...

The night sky is the window to the rest of our universe but it’s also great for lovers. It’s great being in the dark with the ...

NASA has released stunning images of mysterious colorful clouds drifting in the sky over Mars. Captured by NASA's Curiosity ...

The four-planet lineup that began in January concludes by mid- to late February, as Saturn sinks increasingly lower in the ...

The Falcon 9 rocket, which lifted off from Vandenberg Air Force Base, took flight during evening twilight, when light from ...

The zodiacal light shines in the evening as the Moon reaches Last Quarter and skims past Spica and Antares in the sky this ...