Sky & Telescope AU 05.06 2023_downmagaz.net.pdf

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IMAGING
Jumping aboard
the CMOS revolution
P62
OBSERVING
Come on a tour
of globular star clusters
P56
ECLIPSE
Full guide to May’s
eclipse of the Moon
P55
DEEP SEA & SKY
Oceanic observatories
hunting neutrinos
P24
EARTHSHINE
What we can learn from
the pale moonlight
P36
THE ESSENTIAL MAGAZINE OF ASTRONOMY
Weekly detonations
within the Milky Way
P18
TEST REPORT
P67
Sky-Watcher Star
Adventurer GTi
MAY/JUNE
ISSUE 144
2023
$11.50 INC GST
YEAR
QUATTRO 150
SW150Q-OTA
WARRANTY
*
$999
QUATTRO 200
*
$999
STAR ADVENTURER GTi
SWSTAR-GTI
*
$1249
EVOLUX 62ED
*
QUATTRO 250
*
$949
*
$899
$1,499
EVOLUX 82ED
*
$1,749
QUATTRO 300
SW300Q-OTA
*
$2,999
*
$3,449
*
$4,599
*
$5,749
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$10,924
EQ6-R PRO
*
CQ350 PRO
SWCQ350
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$3,499
*
$4,499
$5,499
SWEQ8-R-NOPIER
SWEQ8-RH-NOPIER
*
$7,999
*
EQ8 PRO
$13,999
Take a Bucket-List Trip
Join a
Sky & Telescope
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May/June 2023
ISSUE 144, VOL. 20 NO. 4
REGULARS
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6
Spectrum
News notes
P
.12
Diving deep to catch
cosmic neutrinos
11 Discoveries
23 Cosmic relief
45 Vistas
FEATURES
12 Catching cosmic neutrinos
Scientists are building two vast
underwater ‘observatories’ in the
Mediterranean Sea to help study
these elusive particles.
By Govert Schilling
18 The little stars that can
Surprising new observations show
novae forging a critical and popular
lightweight metal whose price on
Earth keeps going up and up.
By Ken Croswell
OBSERVING & EXPLORING
42 Binocular highlight
Take a close look at a Coma cluster.
By Mathew Wedel
24 The past & future of star
names
Star names trace the diverse roots
of modern astronomy. So why do
we call them what we do?
By Tony Flanders
44 Evenings with the stars
A constellation of winter delights.
By Fred Schaaf
Spotting supernovae
in distant galaxies
46 Sun, Moon and planets
Venus and Mars close in on clusters.
By Jonathan Nally
P
.56
36 Appreciating Earthshine
This subtle celestial spectacle is not
only a wonder to behold, it also has
some surprising uses.
By Thomas Dobbins and William
Sheehan
47 Meteors
See the stream left in Halley’s wake.
By Jonathan Nally
50 Exploring the Solar System
New evidence for Venus’ ashen light?
By Thomas A. Dobbins
56 NGC globulars for winter
nights
Go beyond the Messier catalogue
and explore a collection of lesser-
known star clusters.
By Ted Forte
4
48 Comets
Why do some comets simply vanish?
By David Seargent
52 Going deep
The lure of seeing distant supernovae.
By Bob King
49 Variable stars
One of the reddest stars you’ll ever see.
By Alan Plummer
54 Celestial calendar
Don’t miss the May 6 lunar eclipse.
By Jonathan Nally
AUSTRALIAN SKY & TELESCOPE
May/June 2023
by Jonathan Nally
SPECTRUM
What good
is astronomy?
Sky-Watcher’s
new Go To mount
P
.67
THE ASTRONOMY SCENE
62 Astrophotography
Moving to the latest CMOS cameras
may require changing your imaging
techniques.
By Ron Brecher
67 Test report
With the new Star Adventurer GTi,
Sky-Watcher has upgraded its popular
camera platform to a full-fledged
Go To mount.
By Richard S. Wright, Jr.
WHEN PEOPLE FIND OUT
that I’m into astronomy, they often ask, “Why?
What good does it do?” They seem to think that it’s either a waste of time and
money, just plain weird, or that I should spend more time thinking about our
own planet. When I try to explain that the universe is a part of nature too,
many of them just don’t seem to get it. They seem fully focused only on the
ground beneath their feet and their material possessions, unable to appreciate
the splendour that it is ‘out there’ if only they took the time to look.
I think it’s because most people are city dwellers, living under light-polluted
skies that block the cosmos from view, and rarely venturing into rural areas
where the skies are clearer and darker. They are largely disconnected from
what I think is the most awesome aspect of nature… the endless expanse of
space and the incredible and beautiful objects it contains. In this sense, our
ancestors were a lot luckier than many of us — they lived in eras where the
stars blazed forth in their full glory and humans felt more in tune with the
cosmos. I envy those who live in rural areas now, where they still have the
chance to simply walk outside, look up and be completely amazed.
I can’t imagine going through life not appreciating the wonders of our
universe. It connects me with time and space, and my life is the richer for it.
Jonathan Nally,
Editor
editor@skyandtelescope.com.au
72 Astronomer’s workbench
Here’s a simple project for big
Dobsonians — an easy, large,
unobstructed binocular conversion.
By Jerry Oltion
THE ESSENTIAL GUIDE TO ASTRONOMY
Check out the
Australian Sky & Telescope
website for the latest astronomy news
from Australia and around the cosmos.
skyandtelescope.com.au
EDITORIAL
EDITOR
Jonathan Nally
ART DIRECTOR
Lee McLachlan
REGULAR CONTRIBUTORS
John Drummond, David Ellyard,
Alan Plummer, David Seargent,
EMAIL
info@skyandtelescope.com.au
ADVERTISING
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Jonathan Nally
EMAIL
jonathan@skyandtelescope.com.au
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74 Night life
Events, activities and what’s
happening in the astronomy world.
75 ProAm collaboration
Join a project dedicated to preserving
astronomical history.
By Diana Hannikainen
76 Gallery
The latest images from our readers.
81 Marketplace
81 Index to advertisers
82 Focal point
A solo observing session suddenly
turns alarming, then charming.
By Eric Geater
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AAS
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Australian Sky & Telescope
is
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Sky & Telescope. Sky & Telescope
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AUSTRALIAN SKY & TELESCOPE
ISSN 1832-0457
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All rights reserved.
ON THE COVER
Every week or two, somewhere in the Milky
Way galaxy, a star explodes. Turn to page
18 for the fascinating story of novae.
Australian Sky & Telescope
acknowledges the Cammeraygal people, Traditional Custodians of the land on which this publication is produced,
and pay our respects to their Elders past and present. We extend that respect to all Aboriginal and Torres Strait Islander peoples today.
www.skyandtelescope.com.au
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