Sky and Telescope - June 2016 - 2

June 2016

O B S E RV I N G J U N E

On the cover:

41 In This Section

This color
composite of
NGC 2264 spans
a region about
30 light-years
across.

42 June's Sky at a Glance
43 Binocular Highlight
By Mathew Wedel

PHOTO: ESO

44 Planetary Almanac
45 Northern Hemisphere's Sky

F E AT U R E S

By Fred Schaaf

Dancing with Planets
Millions of Trojan asteroids exist in
gravitational "sweet spots" that hold
important keys to our solar system's
history. By Scott S. Sheppard

46 Sun, Moon & Planets

Is Red Light Really Best?

52 Exploring the Moon

By Fred Schaaf

48 Celestial Calendar
By Alan MacRobert
By Charles A. Wood

Astronomers have long used red light to
protect their night vision, but there may
be a better alternative. By Robert Dick

54 Deep-Sky Wonders

The Elusive B Cassiopeiae

57 Going Deep

By Howard Banich
S &T T E S T R E P O R T

60 Sky-Watcher's AZ-EQ5 Mount
By Alan Dyer

Leo by Night, Lions by Day
Travel to the heart of Africa's national
parks for an observing adventure of a
lifetime. By Nick Howes

4 Spectrum

The Nebula War

6 Letters

ALSO IN THIS ISSUE

By Peter Tyson

A clash between two pioneer sky
photographers deepened the growing
split between amateur and professional
astronomy. By Alan Hirshfeld

COVER
STORY

By Sue French

Track and capture this supernova
remnant with the author.
By David Tosteson

BABAK TAFRESHI

VOL. 131, NO. 6

8 75, 50 & 25 Years Ago
By Roger W. Sinnott

10 News Notes

There's more to find online @

SkyandTelescope.com
OBSERVING GUIDES

Our how-to guides will help you
get the most out of observing
classic celestial sights.
SkyandTelescope.com/objects
TIPS FOR BEGINNERS

New to astronomy? Here's
everything you need to jump
into the fun.
SkyandTelescope.com/letsgo

66 New Product Showcase
68 Astronomer's Workbench
By Jerry Oltion

70 Book Review

ONLINE STORE

Shop our online store for globes,
sky atlases, ﬂeeces, and more.
ShopatSky.com

ROBERT DICK

By S. N. Johnson-Roehr

73 Gallery
84 Focal Point
By Jim Bell

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June 2016 sky & telescope

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Browse personal used equipment and sell your own without
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Sky and Telescope - June 2016

Table of Contents for the Digital Edition of Sky and Telescope - June 2016