this episode we're going to show you how
to find in Dumbbell Nebula this is
harder to find than the ring nebula we
discussed in a previous episode because
it is further away from any bright stars
that you'll used to located it the Dumbbell
Nebula is a great target for both
telescopes and binoculars but rather
than rush to your equipment take a
chance to get your bearings in the night
sky this way you should find the whole
process much easier we're going to be
using two asterisms in this episode
these are groupings of stars that do not
make up all of the 88 constellations
recognized for the Astronomical Union the
first asterism we will use is the Summer
Triangle asterism locate the three
brightest stars of the summer night sky, Vega, Deneb and Altair this asterism
is a very useful tool for navigating the
night sky first made popular by Patrick
Moore it also contains some excellent
astronomical objects which we will hopefully
cover in future episodes if you are
having problems locating Vega or Deneb
the Ring Nebula episodes discusses how
to find Vega while the North American
Nebula episode can help to find Deneb
links in the description below notice
how one of the stars on the triangles'
points has a price on excellent this is
Altair and indicates the section of the
triangle we will be interested in to
further pinpoint our position we need to
locate the Northern Cross
asterism this is group of stars within
the Summer Triangle that make up the
cross part of the Cygnus constellation
at the end of the cross we need to find
a beautiful double star Albireo now
looking between the stars Albireo and Altair
is the too dim stars of the Sagitta
Constellation out of these two stars
locate the star that is closer to Deneb
and head north slightly you should now see
the Dumbbell Nebula I use an O-III filter
and a series of five second stills to
capture this image I found the O-III
filter really increase a detail of be
observed on nebula by increasing
contrast this clip shows what should be
visible to you through the eyepiece
believe it or not that clipped 30
minutes of recording to produce
to improve this image further I've
stacked it together to give this combined
image shows the faint ray of gas around
the white dwarf as well as two larger
masses of the gas the final image has
had drizzling applied and brings out
even more detail it's at this point it
might be good idea to discuss what exactly
you're looking at this Dumbbell Nebula
is a planetary nebula and as such not a
true nebula is in fact formed by a red
giant collapsing after it is burned for
its fuel and cast off its outer layers
which are illuminated by the small core
of the star the newly formed white dwarf
such sights are only visible for a few
tens of thousand years before a gas
spreads out too far away from the white
dwarf to be still visible well that's
all folks for another episode please
comment if you've got any questions like
if you enjoyed the video and subscribe
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astronomy videos good bye and clear
skies
