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web-extra-how-big-bang-ripples-make-the-ideal-cosmic-ruler https://www.astronomy.com/issues/2015/page/11/ 2015 Issue | Page 11 of 19 | Astronomy.com https://www.astronomy.com/uploads/2021/09/BAOs.jpg InStock USD 1.00 1.00 cosmology article ASY 2023-05-18 2015-06-29 38119
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2015

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.
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Cosmology

Web Extra: How Big Bang ripples make the ideal cosmic ruler

The Sun

Here comes the Sun

Solar System

Astronomers recently discovered that Scholz’s star passed close to the Sun 70,000 years ago. Wouldn’t its gravity have sent Oort Cloud comets raining into the inner planets?

The Moon

The “Aristarchus X”

Astrophotography

Field of view indicators

Science

Web Extra: Gamma rays’ long road toward Fermi

Deep-Sky Objects, Stars

Web Extra: Tour 10 autumn binocular highlights

Science

A false dichotomy

Solar System

You can clearly see boulders on comets and asteroids. What are these?

Exoplanets, Planets, Solar System

Europa’s ocean sits under a thick ice shell. If this ocean covers the moon’s solid core, does the shell rotate at a different speed?

Exoplanets, Observing, Planets, Solar System, The Moon

Perseids reign supreme

Solar System

Mystery men of the Perseids

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