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December 2015 | Astronomy.com

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December 2015

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December 2015

ASY151201

The world's best-selling astronomy magazine offers you the most exciting, visually stunning, and timely coverage of the heavens above. Each monthly issue includes expert science reporting, vivid color photography, complete sky coverage, spot-on observing tips, informative telescope reviews, and much more! All this in an easy-to-understand, user-friendly style that's perfect for astronomers at any level.

Features

How immense is the universe?

by David J. Eicher

Unfettered by tales of science fiction, the cosmos is almost incomprehensibly large.

Our solar system: Realms of fire and ice

by Francis Reddy

We start your tour of the cosmos with gas and ice giants, a lot of rocks, and the only known abode for life.

The Milky Way: Earthт??s home galaxy

by Francis Reddy

Giant clouds of gas and dust sprinkled with splashy star clusters adorn the Milky Way's spiral arms, while the galaxy's vast halo teems with darker matter.

The Local Group: Our galactic neighborhood

by Katherine Kornei

The Milky Way’s family of galaxies is locked in a multi-billion-year battle for gravitational supremacy.

The Virgo Supercluster: Our 100,000 closest galaxies

by Sarah Scoles

Small groups combine with larger clusters to form a vast network of interconnected galaxies that spans 110 million light-years.

Limits of the cosmos: The far reaches of space

by Liz Kruesi

Everything astronomers have learned points to a universe populated by superclusters of galaxies, incredibly long filaments, and colossal voids.

Columns

Toys and compromises

by Bob Berman

Big meets small

by Jeff Hester

The Mutus X

by Glenn Chaple

Out-of-focus observing

by Stephen James O'Meara

Understanding wavelets

by Adam Block

Departments

Sky this Month

A gemlike shower

StarDome and Path of the Planets

Ask Astro

Gathering the dark

Stargazing on Mars

Shifting Pillars of Creation

Mercuryт??s retrograde motion

In Every Issue

From the Editor
Letters
Web Talk
Advertiser Index
Breakthrough

Snapshot
Astro News
New Products
Reader Gallery

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Searching for Far Out and Wandering Worlds

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An artificial comet holds secrets to Earths life

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Young super-Jupiter found wandering without a parent

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Searching for aliens who already know we're here

A gamma-ray burst hints that LIGO's double black holes started as one massive star

Pluto's largest moon may have once had an ocean

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