The Grand Canyon in Arizona is one of Earth's natural wonders, carved out over millions of years by the gradual erosion power ...

Alignments of five or more planets are rare—there will be two more featuring five or more planets this year, but after that ...

From January to March, the night sky will host a spectacular parade of planets featuring Venus, Mars, Jupiter, Saturn, Uranus ...

The end of February is the beginning of an evening appearance by the as yet unmentioned planet, Mercury. It appears by about ...

The Moon meets the Red Planet’s rival in Scorpius, skims close to Saturn, and reaches New phase in the sky this week.

February brings a rare planetary parade, with five bright planets in clear view and a special alignment of Mercury and Saturn ...

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

They were dug out by debris sent violently aloft when an asteroid or comet struck the lunar surface 3.8 billion years ago.