Because the Moon is over a quarter the diameter of Earth, the Earth-Moon system is often cited as the pairing in our Solar ...

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 ...

Five of the brightest planets will be visible to the naked eye. With help, you may even spot Uranus and Neptune.

During the Cold War, American and Soviet scientists embarked on an unprecedented quest to contact extraterrestrials. But ...

Venus glowed brightly on a clear night sky over Saint Petersburg, Russia. Footage shows the heavenly body shining above the city lights on 4. The planet is visible from Earth due to its reflective ...

A Month of Bright Planets Venus blazes at its brightest for the year after sunset, then Mars and Jupiter to rule the night ...

A newly confirmed exoplanet around a nearby sunlike star might be astronomers’ best chance yet to look for life beyond the ...

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

February stargazing is fantastic for many reasons, but this year there’s a one-two-three punch of bright planets adding to ...

Mercury takes only 88 Earth days to orbit the sun.

New insights into the extreme conditions behind "disintegrating planets" reveals how they are consumed by the heat of their ...

Venus, Jupiter, and Mars dominate the sky. Catch your last views of Saturn as early in the month, the Moon passes in front of ...