Free Public Observing Night
September 12, 2015
p.m. to 10:00 p.m.
Rudy Park, York, PA. Observatory
York County Astronomical Society, Inc. is a non-profit organization
dedicated to the advancement of the science of astronomy.
Expand your mind by taking in the expanse of the universe.
Come and view the night skies with us through one of our telescopes and let our experienced
members guide you on a tour of celestial wonders, including stars, planets,
nebulae, and the moon. You are also invited to bring your own telescope and
share your experiences with other amateur astronomers. Star Charts are available to help your exploration of the nighttime sky.
observing activities at John Rudy Park, if the weather is questionable, please check our voice message at
for notice of any late cancellation or for an updated
status, check this website.
Observatory See: Directions
If it is clear or mostly clear, the activity will
occur as scheduled. If it is completely cloudy, raining or snowing, the activity will be cancelled.
information on events, scheduling a private party star watch, directions
to the observing site, or for general Society information
please email YCAS at: E-Mail
Public Observing Night Sky
Sun sets at 7:21 p.m. and is located in the constellation Leo the
Moon on September 12th is at new moon and too close to sun to be visible for public observing.
Visible for Public Observing
is visible low in the southwest evening sky in the constellation Libra
"The Scales" just to the right and above the head of Scorpius
Saturn sets at 10:30. Check out Saturn's rings and see Saturn's
in Aquarius in the south east.
is visible this night. Pluto is located in the Sagittarius.
summer constellations are now visible rising in the September evening sky
as twilight falls. Pegasus "The Winged Horse" is rising in the east
along with Andromeda "The Princess of Ethiopia" and Aquarius
Water Carrier". Overhead is The Summer Triangle in the evening sky. The triangle is formed by bright stars
Vega in 'Lyra the Harp", Deneb in "Cygnus the Swan"
and Altair in "Aquila the Eagle". In the lower
south is visible Scorpius "The Scorpion", Sagittarius
"The Archer", and Capricornus "The Goat". Looking
to the western sky is Hercules "The Son of Jupiter"
where you will find the beautiful open globular cluster of stars
Messier 13 and just below Hercules is Corona Borealis "The
this small constellations brightest star Gemma, also known as Alphecca, is set like a
jewel in the midst of the crown. Below Corona Borealis is
Bootes "The Herdsman" with its bright star Arcturus. The Big Dipper is
low in the northwest sky as evening twilight ends. Using the Big
Dipper to find north. See: Finding
These are just a few of the many constellations visible this
are many Galaxies and Globular clusters of star to be viewed this
night and one of the best is Messier
Great Globular Cluster in Hercules which is high in the sky this
night. Another treat is Messier
92 only 9
degrees away from M-13 which is another Globular cluster. Swinging
the telescope from the constellation Hercules is Messier
57 about 21
degrees above Messier 92. This is a Planetary nebulae, it looks
like a small smoke ring in space which was caused by the central
star exploding and the star is still visible through a large
telescope if seeing is very good. The sky this night is full of
many many more wonderful objects than listed above to see and we
hope to see you at the observatory.
September 12, 2015 Night Sky Below
a memorable tour with members of the York County Astronomical Society of
Galaxies, planets, the moon and the constellations of the night sky.
and Constellations Astronomical Pronunciation Guide
the Wonders of your Universe
Picture of the Day
Our sun is almost one million miles in diameter and a million earths would fit in it.
It takes light eight minutes to reach us from the sun.
The last star shown in video is VY Canis Majoris which takes light about 5000 years to reach us
that is light traveling at 186,000 miles per second x 60 seconds
in a minute x 60 minutes in an hour x 365 days in a year x 5000 years.
VY Canis Majoris is (almost 2 billion ) 1.7 billion miles in diameter.
POLLUTION OF OUR NIGHT SKIES
What does light pollution look like?
What does your nighttime sky look like? Try this fun interactive game to see how light
pollution affects the stars you see at night:
Dark Sky Association
Weather and Directions