Sky and Telescope - August 2018 - 2

CONTENTS

THE ESSENTIAL GUIDE TO ASTRONOMY

August 2018

VOL. 136, NO. 2

FEATURES

Shadow Science
Researchers studied last year's
solar spectacle with unprecedented
intensity. By C. Alex Young

22 A Picture-Perfect
Eclipse Experiment
The author redid Eddington's
famous test with astounding
success. By Donald Bruns

A planet-scale smash created Earth's
satellite. But how did it manage to
make a moon so like Earth?
By Javier Barbuzano

OBSERVING
41 August's Sky at a Glance

The celestial Eagle offers a plethora
of planetary nebulae.
By Ted Forte

58 The Riddle of the Nebulae
Using your own equipment, you can
experience the historic observation
that changed astronomy.
By Howard Banich

43 Binocular Highlight
By Mathew Wedel
44 Planetary Almanac
45 Under the Stars
By Fred Schaaf
46 Sun, Moon & Planets
By Fred Schaaf

Visit the other Hawaiian
mountaintop mecca to the stars.
By Richard S. Wright, Jr.
Find us on Facebook & Twitter

From Our Readers

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

8 News Notes
57 Book Review
By Mathew Wedel

Celestial Calendar
By S. N. Johnson-Roehr

70 Astronomer's Workbench
By Jerry Oltion

52 Exploring the Moon
By Charles A. Wood

72 Gallery

54 Deep-Sky Wonders
By Sue French

84 Focal Point
By Fred Myers

ONLINE

ASTRO TOURISM
Come with us to explore wonders
both on Earth and in the sky.
skyandtelescope.com/
astronomy-travel

NASA / ESA / HEIC / HUBBLE
HERITAGE TEAM (STSCI / AURA)

Spectrum
By Peter Tyson

69 New Product Showcase
48

64 A Night on Haleakala¯

A series of stellar
pulses likely launched
the Cat's Eye's shells.

42 Lunar Almanac & Sky Chart

Cover Stories:
34 Aquila's Gems

ON THE COVER

COLUMNS / DEPARTMENTS

IMAGING FOUNDATIONS
Learn the fundamentals of astrophotography with Richard Wright, Jr.
skyandtelescope.com/
astrophotography

ONLINE STORE
Shop our online store for Moon
and planet globes, webinars, sky
atlases, and more.
shopatsky.com

SKY & TELESCOPE (ISSN 0037-6604) is published monthly by Sky & Telescope, a division of F+W Media, Inc., 90 Sherman St., Cambridge, MA 02140-3264, USA. Phone: 800-2530245 (customer service/subscriptions), 888-253-0230 (product orders), 617-864-7360 (all other calls). Fax: 617-864-6117. Website: skyandtelescope.com. ©2018 F+W Media, Inc.
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26 The Moon Mess

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Sky and Telescope - August 2018

Table of Contents for the Digital Edition of Sky and Telescope - August 2018