61 Cygni isn’t bright. But it moves exceptionally rapidly against the background of more distant stars. Its motion reveals its nearness to Earth.
Posts by Larry Sessions
Seeing animals in clouds, or a face in the moon, are examples of pareidolia. Look here for photos and to test your own ability to see things that aren’t there.
Deneb is one of the most distant stars you will see with your eye alone. That’s because it’s one of the most luminous stars in the Milky Way galaxy.
Finding star distances isn’t easy. Here’s how it’s done, and why astronomers recently modified the distance estimate to the famous star Betelgeuse.
Altair needs only 10 hours to spin once on its axis, in contrast to roughly a month for our sun. This mighty star spins on its axis more rapidly than Earth!
One of the prettiest stories in all skylore surrounds this star. “On the 7th night of the 7th moon … “
The ruby Heart of Scorpius is the 16th brightest star in our sky and one of the most gigantic stars known.
World timekeepers will add one extra second on June 30, 2015. Meanwhile, a proposal to dump the leap second has been deferred until October.
Most of us think only of viewing planets at night, but sometimes you can catch them in broad daylight! The next great chance to do that is Saturday, June 20.
Here’s a collection of 10 unexpected, intriguing facts about the stars of our universe – including our sun – that you probably didn’t know!