2019-02-01_Sky_and_Telescope.pdf

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LX90 8” O
MAKE YOUR ASTRO-IMAGING
DREAMS COME TRUE!
The LX90 series offers exceptional performance and quality,
all at an affordable price. The LX90 is equipped with Meade’s
Ultra-High Transmission Coatings (UHTC
™
) and Advanced
Coma-Free (ACF
™
) optical system, bringing the highest level
of optical performance with razor-sharp, high contrast
images. With its built-in GPS and AudioStar
®
handbox, the
0 allows you to find and track over 30,000 celestial
cts in the night sky! This sturdy telescope features a
-duty tripod and dual fork tine design that adds
more stability to its durable structure, without
sacrificing portability.
e LX90’s versatile design makes this scope
and out from the rest! With the addition of
eade’s Equatorial wedge, and other imaging
ccessories, turn this observing scope into an
astro-imaging machine of your dreams!
EQUATORIAL WEDGE
Add Meade's 8" Wedge to the LX90 to
accomplish the tilt of an equatorial type
mount that matches the observer's
latitude and permits precise polar
alignment of your telescope. This allows
you to align the telescope's axis of
rotation with the Earth's axis of
rotation.
*LX90 wedge adapter plate and
auto-guider port module needed.
Deep Sky Imager IV (DSI-IV)
Perfect for your deep-sky imaging, the DSI-IV features a low-noise,
high-resolution 16MP Panasonic CMOS image sensor with a regulated two-stage
therm
moelectric cooler, and 3.8 m pixels - perfect for your astro-imaging pursuits!
LPI-G & LPI-G ADVANCED
Excellent cameras for auto-guiding and solar system astrophotography! Available in Color and
Monochrome, the LPI-G and LPI-G advanced feature a large image sensor along with a high pixel count that
allows for increased resolution, making it ideal for planets & solar imaging.
LRGB IMAGING FILTERS
Introducing Meade’s new top-quality Series 6000 LRGB Imaging Filters! These filters are the ideal match for your
monochrome imaging camera, including the LPI-G series and DSI IV cameras. Capture vivid, colorful astro images
with this set of Luminance, Red, Green, and Blue filters.
OPT Telescopes | optcorp.com
Focus Camera | focuscamera.com
Astronomics | astronomics.com
B&H Photo Video | bhphotovideo.com
Agena | agenaastro.com
High Point Scientific | highpointscientific.com
Adorama | adorama.com
Optics Planet | opticsplanet.com
Woodland Hills Camera | whcamera.com
MeadeInstruments
SKETCHBOOK:
Dissecting the Crab Nebula
PAGE 30
TITAN:
A Plunge Into the Atmosphere
PAGE
22
SPOTS OR SYSTEMS:
The Algol Discovery
PAGE 36
THE ESSENTIAL GUIDE TO ASTRONOMY
What
Came
Before
the
BIG
Bang
?
PAGE 16
FEBRUARY 2019
skyandtelescope.com
Punch Up
Your Nebula
Photos
PAGE 66
TEST REPORT:
Sky-Watcher’s Ultra-Portable
Observing Package
PAGE 58
Painting
Gravity’s
Lens
PAGE 84
A Family of Quality Products,
From a Family Business,
For Your Family
to Enjoy!
With over forty years of design-
ing and building our vision for
eyepiece and refractor perfor-
mance, along with photo/visual
accessories to match, Tele Vue
continues its mission to make your
observing ”...even better than
you imagined.” Call for expert
and accurate technical advice.
Tele Vue
Vi s i o n a r y
®
32 Elkay Dr., Chester, New York 10918 (845) 469-4551.
televue.com
1000 PHOTOS WITHOUT
ELECTRICITY
MiniTrack LX2: The First Fully
Mechanical Photography Mount
ball-head, camera and
tripod not included!
2019
batteries. Simply wind it up and get started.
a ball head and capture every part of the
Omegon is part of nimax GmbH. Price changes and errors excepted. All rights reserved
The mount enables you to capture
every bag and still leaves room for a nice
tripod or a second tele-photo lens.
wide-angle to tele-photo lenses, so much
is possible.
Scan for
more info.
tube, you can calibrate the
yourself the weight and burden.
star. More than enough for a
rough alignment.
MiniTrack LX2
Photography Mount for the northern hemisphere
WxHxD in mm 210x78x30, weight 15.2 Oz
WxHxD in mm 210x78x130, weight 25.8 Oz
WxHxD in mm 250 x 78 x 30, weight 17.3 Oz
55040
56106
57993
60258
Art.-Nr.
Price in $
129.00
159.00
159.00
189.00
Photography Mount for the northern hemisphere incl. ball-head
“The resulting star shapes were impressive, showing no sign of trailing ... We
would recommend the MiniTrack to users of any experience level as a simple
(BBC Sky at Night)
NEW
Photography Mount for the northern and southern hemisphere
NEW
Photography Mount for the northern and southern hemisphere incl. ball-head
WxHxD in mm 250 x 78 x 130, weight 27.9 Oz
Order online at www.omegon.com
CONTENTS
THE ESSENTIAL GUIDE TO ASTRONOMY
February 2019
VOL. 137, NO. 2
FEATURES
Cover Story:
16
What Came Before
the Big Bang?
Cosmologists are tackling a
once-verboten question with
out-of-the-box thinking.
By Faye Flam
22
Titan’s Veil
Saturn’s largest moon has a
remarkably complex atmosphere,
with all the chemical ingredients for
life as we know it.
By Sarah Hörst
84
OBSERVING
41
February’s Sky at a Glance
42
Lunar Almanac & Sky Chart
43
Binocular Highlight
By Mathew Wedel
S&T TEST REPORT
58
Sky-Watcher AZ-GTi and
Evostar 72 Refractor
By Richard S. Wright, Jr.
COLUMNS / DEPARTMENTS
4
Spectrum
By Peter Tyson
From Our Readers
75, 50 & 25 Years Ago
By Roger W. Sinnott
News Notes
Book Review
By David Dickinson
New Product Showcase
M A RLEN A BOCIA N HE WIT T
30
Above the Southern
Horn of Taurus
The Crab Nebula is amazing no
matter how you look at it.
By Howard Banich
44
Planetary Almanac
45
Under the Stars
By Fred Schaaf
6
8
36
Explaining Algol
How John Goodricke and Edward
Pigott discovered and interpreted a
new variable star.
By Linda French
46
Sun, Moon & Planets
By Fred Schaaf
10
48
Celestial Calendar
By S. N. Johnson-Roehr
52
Exploring the Moon
By Charles A. Wood
54
Deep-Sky Wonders
By Sue French
57
66
Giving Nebulae a Boost
Here’s a novel technique to bring
out emission nebulosity in your
astrophotos.
By Timothy Jensen
64
70
Astronomer’s Workbench
By Jerry Oltion
74
Gallery
Find us on Facebook
& Twitter
ON THE COVER
ONLINE
84
Focal Point
By Anna Barnacka
TIPS FOR BEGINNERS
New to astronomy? From learning
the night sky to tips on buying your
first telescope, here’s everything you
need to jump into the fun.
skyandtelescope.com/letsgo
Artist’s concept evok-
ing string theory’s
bubble universes
PHOTO: TA K E 27 LTD /
SCIENCE SOURCE
ASTRO TOURISM
Come with us to explore wonders
both on Earth and in the sky. See
page 15 for current opportunities.
skyandtelescope.com/
astronomy-travel
ASTRONOMY Q&A
From dark matter and black holes to
comet observing and how to clean
eyepieces, get your astronomy 101
questions answered.
skyandtelescope.com/faq
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: 800-253-
0245 (customer service/subscriptions), 888-253-0230 (product orders), 617-864-7360 (all other calls). Fax: 617-864-6117. Website: skyandtelescope.com.
©
2019 F+W Media, Inc.
All rights reserved. Periodicals postage paid at Boston, Massachusetts, and at additional mailing offices. 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 420235, Palm Coast, FL
32142-0235. Printed in the USA.
2
FE B RUA RY 2 019
•
SK Y & TELESCOPE

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