Planets will be visible through February when the clouds clear, but only three will be visible to the naked eye.

Sky watchers in the Arctic were ... between 9.3 and 15.5 miles above the surface. Live Science says this is higher than clouds typically form, but the extreme cold temperatures brought by the ...

Noctilucent clouds shimmer above a hill on Mars in this image from ... making them seem to almost glow in the sky,” wrote Alex Innanen, a York University atmospheric scientist, in the update.

Brilliant clouds produced by SpaceX rocket launch greet morning commuters across California with stunning colors.