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The Milky Way Inside and Out

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The Milky Way Inside and Out, the 108-page special issue with galaxy foldout from Astronomy magazine, takes you on a tour of our galaxy.

You’ll discover:

  • How the galaxy was formed.
  • What makes stars explode.
  • What's at the heart of the Milky Way.
  • Everything we know about exoplanets.
  • And so much more!

The Milky Way Inside and Out is your guide to how and why our wondrous galaxy works. 

Order your copy today »

Features

Recipe for a galaxy

Mix stars, gas, and dust. Cook for 8 billion years. 

Meet the stars next door

The Sun's neighbors hide secrets that could help astronomers learn more about our place in the galaxy.

The hunt for Earth’s bigger cousins

Larger than Earth but smaller than Neptune, these in-between worlds harbor some surprisingly terrestrial environments.

How the Milky Way works

Fundamental forces shape our galaxy and transform gas into stars. 

Inside the Orion Nebula

Astronomers are starting to figure out what’s going on in this colossal stellar nursery.

10 things we don’t know about massive stars

These rare beasts are essential to the universe but often misunderstood. Here are the most important questions facing astronomers.

What makes stars explode?

Sound waves in collapsing stars may produce supernova explosions.

How the Milky Way got a brand new look

By observing in infrared wavelengths, the GLIMPSE survey revealed the Milky Way’s spiral structure.

In search of the galaxy’s magnetic monsters

Magnetars unleash mammoth bursts of energy, but how and why? Astronomers are working to understand these bizarre stellar objects.

Journey to the heart of the Milky Way

A giant black hole anchors our galaxy’s core, swarmed by fast-moving young stars. Astronomers aren’t sure how they got there.

How the Milky Way devours its neighbors

Our galaxy’s current eminence owes much to a past — and present — spent cannibalizing dwarf galaxies.

Exploring the galaxy’s starry satellites

By studying globular clusters, astronomers are deciphering the Milky Way’s oldest secrets.

Stellar archaeology

Star clusters in the Milky Way come in two distinct flavors — open and globular. But other galaxies show these objects may be more alike than we thought.

How the Milky Way’s neighborhood came to be

Our galactic surroundings — filled with an array of galaxy types — provide astronomers with a mini version of the universe.

Our galaxy’s date with destruction

The Milky Way is on a collision course with its neighbor, the Andromeda Galaxy. What will the night sky look like after the crash?

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Dark matter accounts for approximately 80% of the mass of the universe, but what exactly is it?
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