Sky & Telescope August 2011



The Exoplanets that Weren't
Misadventures in planet discovery have continued from 1855 through the present time.
By Brandon Tingley

Pummeling the Planets
Scientists are debating whether the entire solar system suffered a barrage of impacts long after the planets formed.
By Emily Lakdawalla

NEAF Turns 20
The annual Northeast Astronomy Forum has something for every amateur regardless of experience.
By Dennis di Cicco & Sean Walker

Trading Techniques
Attending an astrophotography meeting can boost your imaging skills.
By Sean Walker



Videos from NEAF 2011
S&T senior editor Dennis di Cicco interviews manufacturers and vendors on the floor at the 2011 Northeast Astronomy Forum.
By The Editors of Sky & Telescope

Watch a Star Wink Out on August 10th
On the evening of Wednesday, August 10th, the dark edge of the waxing gibbous Moon will cover the 2.9-magnitude star Pi Sagittarii for the eastern half of North America.
By Tony Flanders

Solar-System Evolution: The Nice Model
According to the Nice Model, the solar system started out very different, and evolved into its current form during one brief burst, which also caused the Late Heavy Bombardment. Click here to see animations of the Nice Model in action.
By The Editors of Sky & Telescope

Lunar Librations
Librations and other lunar data for August 2011
By The Editors of Sky & Telescope

Map Tutorial
Watch Alan show how to use S&T's all-sky charts and planispheres.
By Alan MacRobert



Spectroscopy for Everyone
With inexpensive equipment, you can easily reveal the spectral signatures of everything from nearby planets to distant quasars.
By Tom Field

Table of Contents
See what else August's issue has to offer.