April 8, 2017
p.m. to 10:00 p.m.
Rudy Park, York, PA. Observatory
Astronomy Day April 29, 2017
The York County Astronomical Society (YCAS) will offer a day long slate of activities for children and adults and a night of Public Observing at John C. Rudy County Park for Astronomy Day on Saturday, April 29, 2017.
will be an Astronomy Program in the Observatory if cloudy.
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
717 759 YCAS (9227)
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 changed to an astronomical
presentation in observatory.
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
Visible for Public Observing Night Sky
April 8, 2017
41P/Tuttle-Giacobini-Kresak may be visible on public observing
night in the north northeast constellation of Draco 'The Dragon"
This comet may be observed as a fuzzy binocular object. Stay tuned
to see how bright this comet becomes!
Sun is in the constellation Pisces "The Fishes" rising
at 6:39 am and setting at 7:39 pm.
Click on Moon to
evening sky finds the Moon rising at 5:15 pm in the east located
on the constellation border of Leo the "Lion" and moves
into Virgo as the night progresses. The Moon is visible for most
of the night setting at 5:31 am.The April Full Moon is popularly known as
The Full Worm Moon
Phase of the Moon on April 8, 2017: Waxing Gibbous with 95.14% of the Moon's visible disk illuminated.
The Full Moon for April occurs on April 11, 2017 at 06:08 pm.
is low in the western sky right after sunset and is located in the constellation Aries The Ram.
Arrive at public observing at 8:00 pm to see this planet before it
is too low in the sky to be observed. Mercury sets at 9:02. Mercury appears
as a small crescent through a telescope at a phase of 15.98% lit..
is visible low in the west after sunset located in the constellation
Aries "The Ram". Mars sets at 10:21 p.m. Mars is
disappointing as seen through a telescope now as the planets disk
size has become smaller due to the increasing distance from Earth.
rises in the east at 7:22 pm located in the constellation Virgo
The Maiden. Four of Jupiter's Moons are visible at 10:00 pm as
"The Lion" constellation, a sign of the coming spring is above the eastern horizon.
constellation Cancer "The Crab" lies just to the right
of Leo with
it's pretty open star cluster M-44 also known as the Beehive
To the right of Cancer is constellation Gemini 'the Twins"
high in the west southwest. The
winter constellations Orion "The Hunter" and Canis Major
"The Larger Dog" with the brightest star visible in the
northern hemisphere is Sirius in Canis Major located low in the west
southwest sky. Taurus the
"Bull" with its bright red star Aldebaran are visible
low in the western sky. About 13 degrees
to the right of Aldebaran is the open star cluster M-45 also known as the
or "Seven Sisters". Visible
in the northwest lies Perseus the "Rescuer of Andromeda"
with the beautiful Perseus Double Cluster consisting of two
open star cluster NGC 869 & NGC 884. The constellation Cassiopeia,
known as "The Queen" is low on the horizon in the north
northwest sky. The Big
Dipper is standing on its handle and is visible high above the
northeast horizon. To the left (west) of the Big Dipper is the Little Dipper which
contains Polaris the north star. See How to use the Big
Dipper to find Polaris the north star. See: Finding
These are just a few of the many constellations visible this
The Winter Circle
is is still visible this month low in the western sky this night, can you find it? It is also sometimes called the Winter Hexagon
It is a big circle of bright stars on the dark dome of a winter night. At the center of the Winter
Circle, you’ll find center Orion’s bright red star Betelgeuse. Rigel, Aldebaran, Capella, Procyon, Sirius, Castor and Pollux are the bright stars that make up the large, circular pattern.
The winter circle is asterism. An asterism is a recognizable star pattern.
April 8, 2017, 2017 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