Featured Articles

Black holes were early starters

Huge black holes formed soon after the Big Bang when giant galaxies collided.

Stretchy “conveyor belt” slows the Sun

Why was the last solar cycle so long? Stretched plasma streams could be the answer.

What’s up? September’s night sky

When and where to see the Moon and planets this month.

How long is a day on Saturn?

Answer…no one’s really sure. But the planet’s auroral “heartbeat” might hold a clue.

Eye of the Sun

Amazing sunspot image looks like a ghostly eye staring back at us.

“Superwind” galaxy NGC 4666

It’s 80 million light-years from Earth, and blowing a gale.