Astronomy May 2013

How life survived a cool early Sun
By Bruce Dorminey
How did Earth’s surface stay warm enough for liquid water to exist and life to emerge?
pg. 22

Why the universe has no center
By Liz Kruesi
Confused by the universe’s size, shape, and limits? Let our experts clarify these complex concepts.
pg. 28

The science behind UFOs
By Philip Plait
Even the strangest sightings have logical explanations.
pg. 44

Target Hubble’s galaxy classes
By Alan Goldstein
How do astronomers classify galaxies? Find out by observing the various types.
pg. 50

Dennis Mammana’s cosmic portraits
By Dennis Mammana
This night sky photographer blends the terrestrial with the celestial.
pg. 56

How to choose the right binoculars
By Mike D. Reynolds
When the time comes to observe with both eyes open, follow these tips and you won't go wrong.
pg. 62

Explore 11 spring binocular gems
By Phil Harrington
Grab your binoculars and peruse a globular cluster, double stars, and lots of galaxies.
pg. 64

"Astronomy" tests the Telescope Drive Master
By Mike Reynolds
This easy-to-use device will smooth out your mount’s tracking to make your images crystal clear.
pg. 66