Following the much-ballyhooed “planet parade” this winter, the planets have been gradually dipping below the horizon, ...

New Moon brings excellent dark-sky conditions for observing galaxies, nebulae, and star clusters in the sky this week.

Stunning new Jupiter photos from NASA’s Juno spacecraft reveal storms, cloud bands, and its volcanic moon Io as the mission ...

A new study reveals fresh signs of geological activity on Venus — clues that the planet's mysterious surface is still ...

Today, it’s believed that Jupiter and Saturn, the largest planets, were the first to fully form, both within a few million ...

I pick out North America’s celestial highlights for the week ahead (which also apply to mid-northern latitudes in the ...

Venus may not have Earth-style tectonic plates, but it’s far from geologically quiet. A new model shows its crust is ...

More than 50 years ago in the early 1960s, the Soviet space program embarked on a bold new undertaking to go where no human had gone before.

NASA engineers have revived old thrusters on Voyager 1 to prevent a clog from endangering the mission during a planned ...

Mountains rise, volcanoes spew, and Earth itself quakes as the crust constantly remakes itself in the ceaseless cycle of ...

A reappraisal of decades-old data suggests that strange circular formations on Venus could be volcanic “rings of fire” ...

Vast, quasi-circular features on Venus's surface may reveal that the planet has ongoing tectonics, according to new research ...