Like a celestial parade across the cosmos, five bright planets are lighting up the night sky and visible with the naked eye ...

"Exploring the clouds, say by balloon, can be done with technology that's ready today," Byrne told Space.com. "We could ...

Mars, Venus, Jupiter and Saturn should be visible to the naked eye, but with a telescope you can spot Neptune and Uranus.

According to a recent YouGov poll, 35% of Americans think Pluto is not a planet. But they are all wrong—kind of. To get to ...