Magazine | Page 113 of 282 | Astronomy.com

I have been trying to get my head around “there is no center to the universe” without success. Can you give a layman’s explanation?

Observing Basics, Solar System

Web Extra: 25 asteroids to spot through binoculars

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

Here comes the Sun

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 “Aristarchus X”

Astrophotography

Field of view indicators

Web Extra: Gamma rays’ long road toward Fermi

Deep-Sky Objects, Stars

Web Extra: Tour 10 autumn binocular highlights

A false dichotomy

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?