Today is an equinox, a date when day and night are equal.

Globular star cluster Omega Centauri, also known as NGC 5139, is some 15,000 light-years away.

This dance is to the death. Along the way, as these two large galaxies duel, a cosmic bridge of stars, gas, and dust currently stretches over 75,000 light-years and joins them.

Twenty-one years ago results were first presented indicating that most of the energy in our universe is not in stars or galaxies but is tied to space itself.

If not perfect, then this spiral galaxy is at least one of the most photogenic.

When did these big galaxies first begin to dance?

A flying saucer from outer space crash-landed in the Utah desert after being tracked by radar and chased by helicopters.

Better known as Hind's Crimson Star, R Leporis is a rare star in planet Earth's night sky. It's also a shocking shade of red.

Sometimes, the surface of our Sun seems to dance.

Why is the Sun so quiet? As the Sun enters into a period of time known as a Solar Minimum, it is, as expected, showing fewer sunspots and active regions than usual.