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18

Great Sights on Saturn p. 54

THE ESSENTIAL MAGAZINE OF ASTRONOMY

T H E E S S E N T I A L M A G A Z I N E O F A S T R O N O M Y

Shoot the

Planets with

Your DSLR p. 72

MAY 2012

THE DARK-SKY FRONTIER

ASTRONOMY

in National Parks

p. 26

Raging Below

Saturn’s Rings

p. 20

May’s Ring of

Fire Eclipse

Comet Lovejoy:

Solar Survivor

p. 36

p. 50

Visit SkyandTelescope.com

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D

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Delos.

Where it's Always 72°

with 20mm Eye-relief.

1

17.3mm

The newest focal length to join the acclaimed 6mm and

10mm Delos line. Astronomy magazine writes,"Tele Vue

has constructed an eyepiece that stands with the best deep-sky and planetary eyepiecees on

the market." From Astronomy Technology Today, "Bottomline: If you’re in the

market for a planetary eyepiece, you owe it to yourself to consider the Tele Vue

Delos." And from Sky & Telescope, "...it was the 'distinctly pleasurable' observing

experience that most impressed our reviewer. When it comes to eyepiece design, the

Delos seems to have hit all the sweet spots." With Ethos performance standards

Delos’s huge eyelens offers

incredible “immersion.”

as benchmarks, the Delos achieves full ﬁeld sharpness, virtually perfect distortion

correction, and color neutrality. Like all Tele Vue eyepieces, image ﬁdelity is maximized utiliz-

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ing glass matched multi-coatings and anti-reﬂection surfaces throughout the eyepiece. Get

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See us at the:

NEAF

NORTHEAST

ASTRONOMY

FORUM

21 st Annual

Suffern, NY • April 28-29

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May 2012 VOL. 123, NO. 5

OBSERVING IN MAY

43 In This Section

44 May’s Sky at a Glance

On the cover:

The breathtaking

scenery of

Yosemite Valley

gives a superb

setting to

celestial jewels.

45 Binocular Highlight

By Gary Seronik

There’s more to find online @

SkyandTelescope.com

PARK PHOTO:

TYLER NORDGREN

46 Planetary Almanac

47 Northern Hemisphere’s Sky

By Fred Schaaf

FEATURES

20 Saturn’s Raging Superstorm

INTERACTIVE ALMANAC

Sky info tailored to your location

with a couple of clicks.

skyandtelescope.com/almanac

48 Sun, Moon, and Planets

A mysterious Great White Spot

By Fred Schaaf

erupted on Saturn in late 2010, the

50 Celestial Calendar

sixth such storm in recorded history.

By Alan MacRobert

By Agustín Sánchez-Lavega

54 Exploring the Solar System

26 Stars Above, Earth Below:

Moon

May 23

By Alan MacRobert

Astronomy in National Parks

COVER

STORY

Renowned for their terrestrial beauty,

56 Deep-Sky Wonders

` Ta u

U.S. national parks are among the

By Sue French

best places to revel in the splendor of

Moon

May 22

the night sky.

60 Going Deep

SKY

WEEK

SKY

WEEK

Venus

SKY

SKY

By Tyler Nordgren

By Alan Whitman

SKY

WEEK

SKY

SKY

WEEK

36 The Remarkable Case

Betelgeuse

S&T TEST REPORT

64 S&T Test Report

of Comet Lovejoy

Moon

May 21

Against the odds, Comet Lovejoy

By Johnny Horne

survived its swing by the Sun and

became one of the most spectacular

Looking West-Northwest

comets of the past few decades.

ALSO IN THIS ISSUE

By John E. Bortle

6 Spectrum

SKYWEEK

Watch our weekly PBS segment

on what’s currently up in the sky.

skyandtelescope.com/skyweek

By Robert Naeye

72 Planetary Imaging

with Your DSLR Camera

8 Letters

10 75, 50 & 25 Years Ago

Chances are you already own a great

planetary camera, but didn’t know it.

By Roger W. Sinnott

By Jerry Lodriguss

NEW EQUIPMENT DIRECTORY

Browse hot products for all

types of observing.

skyandtelescope.com/directory

12 News Notes

36

68 New Product Showcase

70 Telescope Workshop

By Gary Seronik

TIPS FOR BEGINNERS

New to astronomy?

Here’s everything you need

to jump into the fun.

skyandtelescope.com/letsgo

76 Gallery

86 Focal Point

By Thomas Watson

SKY & TELESCOPE (ISSN 0037-6604) is published monthly by Sky & Telescope Media, LLC, 90 Sherman St., Cambridge, MA 02140-3264, USA.

Phone: 800-253-0245 (customer service/subscriptions), 888-253-0230 (product orders), 617-864-7360 (all other calls). Fax: 617-864-6117. Website:

SkyandTelescope.com. © 2012 Sky & Telescope Media, LLC. All rights reserved. Periodicals postage paid at Boston, Massachusetts, and at additional

mailing ofﬁ ces. Canada Post Publications Mail sales agreement #40029823. Canadian return address: 2744 Edna St., Windsor, ON, Canada N8Y 1V2.

Canadian GST Reg. #R128921855. POSTMASTER: Send address changes to Sky & Telescope, PO Box 171, Winterset, IA 50273. Printed in the USA.

Find us on

Facebook &Twitter

sky & telescope

4

May 2012

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Meade Instruments is commonly acknowledged as

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