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Free Public Observing Night November 15, 2014

8:00 till 10:00 p.m.  

At John Rudy Park, York, PA. Observatory

The 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.

For all observing activities at John Rudy Park, if the weather is questionable, please call 949-963-9147 or check this website for notice of any late cancellation or for an updated status.

To 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.

For 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 YCAS


The October 11, 2014 Night Sky for Public Observing.


The Sun sets at  6:33 p.m. on October 11th is located in the constellation Virgo The Maiden.


The Moon this October 11th rises at 9:00 p.m. and is 84.45 percent lit rising in the east in the constellation Taurus the Bull.

Planets Visible for Public Observing evening sky


Mars in the constellation Scorpius the Ophiuchus is visible low in the southwest after dusk. Mars sets at 10:32 p.m.

Uranus & Neptune

Uranus is rising in the east in the constellation Pisces the Fish. Neptune is in the constellation Aquarius.


Comet C/2014 E2 (Jacques) is fading but still visible in telescopes. The comet this night is in Cygnus the Swan.


As public observing begins the Summer Triangle is almost overhead with the stars Vega, Deneb, and Altair forming the distinctive asterism known as the Summer Triangle. In the west is Ophiuchus "The Serpent Holder" and Hercules "The Son of Jupiter" In the east the autumn constellations are rising. Watch as the dim autumnal constellations Andromeda "daughter of Cepheus", Auriga "The Charioteer",  Aries "The Ram", Perseus "The Hero", Cetus "The Whale", Pisces "The Fish" and as public observing ends Taurus "The Bull" is low in the eastern horizon starting to rise. In the northern sky are the constellations Ursa Major (Big Dipper) and Ursa Minor (Little Dipper) with the north star Polaris. It takes light from Polaris 390 light years to reach us. In the south are constellations Capricornus "The Sea Goat and low in the southwest is Sagittarius "The Archer"

View the October 11, 2014  Night Sky Below

North - South - East - West - Zenith

 Take a memorable tour with members of the York County Astronomical Society of Galaxies, planets, the moon and the constellations of the night sky.

Stars and Constellations Astronomical Pronunciation Guide

Directions to Observatory

See: Directions

Explore the Wonders of your Universe

Astronomy Picture of the Day

The Known Universe


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. 


 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: 

Light Pollution also see: Globe At Night

International Dark Sky Association

See Weather and Directions map below.


Directions to Observatory

See: Directions

The GPS coordinates of the observatory are: N40.024400 W076.704700



The York County Astronomical Society holds a public observing session every month, check this website for times. 

The club's telescopes will be used to show the public many of the fascinating objects that are up in the nighttime sky. We will also be showing people how to use Star charts to identify the stars and constellations that are up in the nighttime sky. The public is encouraged to bring their own telescopes, if they have one, to learn how to use them more effectively. If you are interested in buying a telescope, this is a great place to ask questions.

For 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 YCAS Membership applications are available upon request.

Contact us for Scouts Astronomy Merit badge program.

Please Observe Below

While on the observatory's premises: no smoking, food, pets (except guide dogs) or flash photography is permitted, thank you. In accordance with the ADA, those with disabilities who wish to gain access within York County Parks should telephone the County of York human services offices at (717-771-9099).

The York County Astronomical Society, Inc. is a non-profit organization dedicated to the advancement of the science of astronomy to all concerned Unless otherwise advertised, Most star watches are held at our observatory, located in John Rudy County Park, at 400 Mundis Race Road in York County, Pennsylvania, 17402 , they are free and open to the public. If you have a red-filtered flashlight please bring it along. 


2014 SCHEDULE See: YCAS Schedule page for more dates

Need help with your telescope? See New Telescope Clinic.

Check out the new show at the YCAS Planetarium. Go to Planetarium link.

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