Earth is home to some truly bizarre and breathtaking landscapes — here are 20 that look straight out of an alien world.

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

Exciting February sky events include Venus at its brightest and closest to Earth, the moon occulting the Pleiades, and a parade of planets in the post-sunset sky.

It has its themes — among them, self-improvement, self-control and independence of thought — but more than any one idea, it celebrates a kind of swaggering, often vulgar male speech, defined in ...

YR4, an asteroid that currently has a more than 1 percent chance to hit the Earth in 2032, catching the attention of ...

Starting up again Saturday, a sweeping view of our solar system will glow in the night sky. The planetary alignment, or a ...

There may be something about Earth’s remote places that root many of humanity’s greatest achievements in space. John Glenn (the first American to orbit the Earth) and Neil Armstrong (the first man ...

When astronomers found a large world farther out than Pluto, it became one of the final nails in the coffin of our ninth ...

Will the Lower Hudson Valley be able to see these celestial spectacles Feb. 1 and 3? It depends on the weather.

Explore the debate on climate change causes: human activities vs. natural variability. Discover the latest data, scientific ...