Sky and Telescope - September 2018 - 41

OBSERVING
September 2018

1 DUSK: After sunset, Venus and
Spica form a pretty pair a little more
than 1° apart in the west-southwest.
The duo anchors a graceful arc of
planets that stretches to Mars in the
southeast, with Jupiter and Saturn
along the way.
5 DAWN: At northern latitudes,
the zodiacal light is visible in the east
beginning some two hours before
morning twilight. Look for a tall
pyramid of dim light tilted toward the
right. If you can find a dark viewing
spot, you might see this phenomenon
over the next two weeks.

5-6

DAWN: Mercury poses in the

east 1½° above Regulus in Leo before
the Sun rises. Look for the tiny but
bright planet to the left of the star the
following morning. Binoculars help.

7 EVENING: Algol shines at
minimum brightness for roughly two
hours centered at 10:29 p.m. EDT.
13 DUSK: The waxing crescent
Moon, Jupiter, and Alpha (α) Librae,
or Zubenelgenubi, form an almost
perfect equilateral triangle with
sides some 4° long in the hours
after sunset.
15 EVENING: Look toward the
southwest to see the Moon, one day
shy of first quarter, hanging some 8°
above Antares and flanked by regal
Jupiter and ringed Saturn.
16-17 EVENING: On the 16th the
first-quarter Moon has crept up on
Saturn and sits 8° right of the ringed
planet; the following evening the
Moon has leapfrogged over the planet
and now poses 4½° to Saturn's left.

19 EVENING: Continuing its trek
eastward, a fattening Moon visits
Mars and hovers some 4° above the
burnished planet. Follow this duo
as they set together in the westsouthwest.
22 AUTUMN BEGINS in the
Northern Hemisphere at the equinox,
9:54 p.m. EDT.
27-28 NIGHT: Algol shines at
minimum brightness for roughly two
hours centered on 9:09 p.m. PDT
(00:09 a.m. EDT).
30 NIGHT: The waxing gibbous Moon
rises in the late evening, soon followed
by Aldebaran. Less than 1° separates
the pair by midnight local time.

This recent image of Messier 8, or the Lagoon Nebula, was taken during February 12-18, 2018, using the Hubble Telescope's Wide Field
Camera. The nebula itself is some 55 by 20 light-years, but the image here only shows an area spanning some 4 light-years. NASA / ESA / STSCI

sk yandtelescope.com * S E P TE M B E R 2 018

41

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

Contents
Sky and Telescope - September 2018 - Cover1
Sky and Telescope - September 2018 - Cover2
Sky and Telescope - September 2018 - 1
Sky and Telescope - September 2018 - Contents
Sky and Telescope - September 2018 - 3
Sky and Telescope - September 2018 - 4
Sky and Telescope - September 2018 - 5
Sky and Telescope - September 2018 - 6
Sky and Telescope - September 2018 - 7
Sky and Telescope - September 2018 - 8
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Sky and Telescope - September 2018 - Cover3
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