Joe Rao

These two celestial objects will certainly attract immediate attention because of their great brightness.

Two planets shine prominently in the evening sky and two more are favorably placed in the early morning sky.

Don't miss these cosmic treats this Halloween!

The comet "... has almost certainly disintegrated. There's probably not much left of its primary core."

The full moon names for each month, why they’re named so and what we can expect from these lunar events.

If you wish to get the full "supermoon effect," then Wednesday is your night.

A heralded newfound comet may already be breaking up.

Comet Tsuchinshan-ATLAS is on its way to brighten up the night sky — and the best is yet to come.

The mean distance of the moon to the Earth is increasing at the rate of 1.5 inches (about 3.8 cm) each year. Here’s what that means for solar eclipses.

Comet Tsuchinshan-ATLAS will have a close encounter with the sun today (Sept. 27) here's how to make the most of comet viewing opportunities this weekend and beyond.