Rosetta sets its sights on comet mysteries

A small emissary from planet Earth has entered orbit around Comet 67P, where it will perform the most detailed reconnaissance of a comet ever.

A comet’s nucleus laid bare

Scientists working with the European Space Agency’s Rosetta spacecraft have decided where on Comet 67P/Churyumov-Gerasimenko’s nucleus they will set down the Philae lander.

Catch the sounds of exploding stars

Astronomers are arranging music based on observations to learn much more about supernovae.

Web Extra: Listen to two supernova songs

Scientists are turning observations of massive-star explosions into sound, and they’ve completed two of these sonifications.

How astronomers measure the cosmos

Sound waves at the beginning of time may help scientists find the universe’s expansion rate today.

Web Extra: Ripples in space

The Baryon Oscillation Spectroscopic Survey is looking for sound waves at the beginning of time — and now.

Secrets of the Pinwheel Galaxy

Finding nebulae and clusters in this Local Group spiral is a snap.

When astronomy gives you goosebumps

Sometimes our hobby is so cool, it gives you the chills.

A great year for the Leonids

Set your observing clock for the evening hours of November 17, and see if this highly variable meteor shower offers any surprises.

Astronomy tests William Optics’ new refractor

Superb craftsmanship and high-quality optics make this a 4-inch telescope you’ll be proud to own.


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