Sky & Telescope - January 2020 - 62

BIG, BOLD, BRIGHT, BEAUTIFUL

by Jerry Oltion

A Tourist's G
Jerry Oltion's ongoing series of
nighttime favorites continues with
a selection of winter's splendors.

W

D

62

inter highlights? There are winter highlights? If you
live in the Paciﬁc Northwet [sic], as I do, the very
concept may seem oxymoronic. But we do get a few
clear nights throughout the winter, and when the clouds roll
away and I actually get some sky, I don't waste a minute of
it. No tracking down faint fuzzies for me; in the wintertime
I go for the gusto, ﬁlling my night with the biggest, boldest,
brightest, and most beautiful targets I can ﬁnd.
Here are some of those glorious targets guaranteed not to
waste your time.
First off, of course, is M42, the famous Orion Nebula.
If you can only look at one item in the winter sky, this is
it. The middle of the sword hanging from Orion's belt, this
emission nebula is arguably the best one in the sky. It's visible by naked eye, although it just looks like a fuzzy star, but
in binoculars or any telescope it's absolutely stunning. Big
sweeping arcs of glowing gas and dust
stretch outward and curve around
B
like two hands cupping a precious
10"
E
jewel. That jewel is the Trapezium,
A
a tight group of four stars, named A
THE TRAPEZIUM
through D as shown at left. C, the
brightest, is the powerhouse that
C
F
makes the entire nebula glow.
You can (and should!) spend
hours studying the Orion Nebula. At
low power you can see its overall structure as the birthplace
of hundreds of brand-new stars (indeed stars are still forming there), and as you crank up the power you can zoom in
on more and more structure within the nebula. A nebula ﬁlter (O III, Ultra-High Contrast, or even just a skyglow ﬁ lter)
will reveal even more.
At high power (and unﬁltered) the Trapezium gives up two
more stars, the ﬁrst relatively easy between the two that make
up the narrow end of the skewed trapezoid, and the other
much more difﬁcult just outboard of the dazzling C star. You
need good seeing and high magniﬁcation for this, but picking
out the E and F stars of the Trapezium is always a kick.
JANUARY 2 02 0 * SK Y & TELESCOPE

to the

Win

Sky & Telescope - January 2020

Table of Contents for the Digital Edition of Sky & Telescope - January 2020

Contents
Sky & Telescope - January 2020 - Cover1
Sky & Telescope - January 2020 - Cover2
Sky & Telescope - January 2020 - 1
Sky & Telescope - January 2020 - Contents
Sky & Telescope - January 2020 - 3
Sky & Telescope - January 2020 - 4
Sky & Telescope - January 2020 - 5
Sky & Telescope - January 2020 - 6
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Sky & Telescope - January 2020 - Cover3
Sky & Telescope - January 2020 - Cover4
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