Black holes: seeing the unseeable

New technology will reveal the event horizon – direct evidence that black holes exist.

Online extra: Watch a black hole spin

Animation shows the energetic region near a massive object”s point of no return.

New Horizons flies past Jupiter

Bound for Pluto, the New Horizons spacecraft gets the closest look at Jupiter and its moons in 4 years.

Online extra: New Horizons at Jupiter

Follow NASA”s New Horizons mission as it whisks past Jupiter.

The Big Bang + 1 second

Scientists are trying to find the torrent of neutrinos unleashed following cosmic genesis.

Explore a dozen must-see galaxies

Venture off the beaten path to observe twelve extragalactic gems Messier missed.

Online extra: Explore 14 more spring galaxies

Northern California observer Steve Gottlieb lists more than a dozen targets awaiting you at the eyepiece.

Observe the sky’s most colorful double stars

You’ll have no problem seeing these celestial beauties through a small telescope, even through haze and light

An easy guide to astro-speak

If you’ve ever wondered about some of the terms astronomers use, here’s an illustrated guide.

Orion’s new 4-inch powerhouse

The 100ED EQ-G’s high-quality optics provide plenty of great sky views at a price that doesn’t break the bank.


This month in Astronomy
Beautiful universe
Bob Berman’s strange universe
Glenn Chaple’s observing basics
Phil Harrington’s binocular universe

The Lion’s roar

Stephen James O’Meara’s secret sky
The sky this month
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