Page 72 - Astronomy - October 2017 USA

5. SPIN DOCTOR
The Propeller Nebula (DWB 111) is a
small part of a much larger emission
nebula in the constellation Cygnus.
It’s also faint. To create this image, the
photographer combined 16 hours of
exposures. • Rodney Pommier

6. COSMIC BALLOON
Planetary nebula NGC 7094 lies in the
constellation Pegasus not far from
the famous globular cluster M15.
Observers using 11-inch or larger tele-
scopes can see some details in it, along
with its 13th-magnitude central star.
• Warren Spreng

7. YOU IN?
Irregular galaxy Sextans B lies 5
4.4 million light-years away. Because
of its distance, astronomers are unsure
if it belongs to our Local Group. And
although it appears as only stars, it
contains several planetary nebulae and
a large globular cluster. • Dan Crowson

8. GASEOUS ERUPTION
The photographer captured this pair
of huge prominences dancing above
the Sun’s surface July 8, 2017. The large
one arced some 43,400 miles (70,000
kilometers) above the solar limb.
• Paco Bellido

6 7

Send your images to:
Astronomy Reader Gallery, P. O. Box
1612, Waukesha, WI 53187. Please
include the date and location of the
image and complete photo data:
telescope, camera, filters, and expo-
sures. Submit images by email to
readergallery@astronomy.com. 8

72 ASTRONOMY • OCTOBER 2017