Free Public Observing Night
March 21, 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
The 2015 Night Sky for
FOR MARCH BELOW
Sun February 21st is in the constellation Aquarius setting at 5:49.
Moon is a thin crescent this night in the constellation
Pisces setting in the west at 9:00 p.m.. The Planet Uranus is very
close to the Moon appearing at 00°51'19" from each other.
C/2014 Q2 (Lovejoy) is visible this night high in the northern sky in the
constellation Perseus. Check it out
through one of YCAS telescopes!
Visible for Public Observing evening sky
is very close to the crescent Moon this evening having been
occulted by the Moon right after sunset.
is in the constellation Cancer the Crab, located high in the
eastern sky. You
may catch a view of four of Jupiter's Moons IO, Europa, Ganymede
and Callisto through YCAS telescope
as seen below at 8:00 p.m.. By 9:00 the two moons IO and Europa
become closer together.
during public observing are Neptune, Mars, Venus and Mercury having set in
the west shortly after sunset. Saturn is in the eastern morning
and Venus will be setting in the western horizon and not visible as
public observing begins
but if you look just after sunset from your home, in the west you may catch a
glimpse of these two planets very close together. They appear at
only 00°25'47" degrees apart. This is called a conjunction. The
two planets are not really close but from our point of view from
Earth they do appear close.
public observing begins Gemini the Twins are visible high
overhead. Leo the Lion is rising in the east.. Below and to the right
(west) of Gemini is Orion
the Hunter where, Messier
42, the Great Nebula
is located in Orion. Below Orion is Canis Major rising with Sirius
brightest star visible in our night sky. Taurus the Bull is high in
west. Almost overhead is the Winter Circle, sometimes called the Winter Hexagon,
an asterism which is just a recognizable star pattern
containing the group of bright stars Capella, Aldebaran, Castor,
Pollux, Procyon, Rigel and Sirius. See below.
Circle-Brightest Winter Stars
in the northwest is the setting constellation Andromeda the Princess of Ethiopia
The Andromeda Galaxy, a spiral galaxy which is the closest galaxy to
Earth. Cassiopeia the Queen of of Ethiopia is in the north north
west sky. The constellation Cepheus, King of of Ethiopia lies
below Cassiopeia. Ursa Major
the larger she Bear also known as the Big Dipper is in the northeast
sky. Come explore these constellations and the
stars and galaxies with YCAS astronomers.
February 21, 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