The next time you're out watching a sunset, tturn around and relish the mighty shadow of Earth looming just behind your back. Here's a riddle. What sets when the Sun rises and rises when the Sun sets? If you guessed Earth's shadow, give yourself a pat on the back. Strangely, it might be the...
Fascinating faculae provide a way for anyone with a small telescope to track the ups and downs of the solar cycle — even when there are no sunspots. Sunspots get all the press. Last week the Web hummed with articles about a spotless Sun, the first time since August 2011 our star wore a...
Channel your inner superpower by looking up at the night sky precisely when a dazzling blaze of light is beamed to Earth from outer space.
Not every set of closely paired stars requires binoculars or a telescope to "split". Here's a guide to summertime doubles you can tackle with your eyes alone.
On July 5th, the Moon has a remarkably close brush with Mars, followed two nights later by a similar rendezvous with Saturn.
Astronomers now know the secret of this moon's strange two-faced appearance, but it's still remarkable to watch the "now you see it, now you don't" performance as it moves around Saturn.
Noctilucent clouds form at the boundary between Earth and space. Their electric blue billows incite the imagination and inspire us to keep watch at dusk for their arrival.
Since C/2012 K1's discovery two years ago, this first-time visitor from the outer solar system has brightened steadily and is now within reach of a small telescope and even binoculars.