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Free Public Observing February

7:00 p.m. to 9:00 p.m.

At John Rudy Park, York, PA. Observatory

There will be an Astronomy Program in the Observatory if cloudy.

The York County Astronomical Society, Inc. is a non-profit organization dedicated to the advancement of the science of astronomy.

NOTE: YCAS STARWATCH: We will be starting at the new time, 7pm through the winter months till March when we go back on Daylight savings. Come out to look through the telescope at stars, star clusters, nebula, and the Andromeda galaxy while we laser point in the sky the constellations they reside in. Have some hot chocolate and cookies.

For all 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.

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 changed to an astronomical presentation in observatory.

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 Sun on February 10, 2018 rises at 7:06 a.m. and sets at 5:37 p.m.. Located in the constellation Capricornus.


Click on Moon to enlarge image.

The Crescent Moon does not rise until around 3:30 a.m. in the constellation Ophiuchus.

Planets Visible for February Public Observing Night


Uranus is located in Pisces and sets at 10:51 pm.. At around 7:00 pm it is visible about 40 degrees above the western horizon.

Constellations for 8:00 P.M.

The Big Dipper is low in the northeastern horizon. To the left 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 North Star. In the north is the Little Dipper, Cassiopeia lies to the left and slightly above the Little Dipper. Andromeda "the Princess of Ethiopia" is to the left of Andromeda containing M-31 (the Andromeda Spiral) galaxy.  Almost overhead is the constellations Gemini "the Twins".  Orion "the Hunter" is located high in the southeast sky. Above Orion is the constellation Taurus "the Bull". Above almost overhead of Taurus is the constellation Auriga :the Charioteer". These are just a few of the many constellations visible this night. The Winter Circle sometimes called the Winter Hexagon is high over head. The winter Circle is an asterism, a grouping of bright stars in the winter night. The Winter Circle, consists of Orion’s bright red star Betelgeuse. Rigel, in Aldebaran, Capella, in Procyon, in Sirius, and Castor and Pollux in Gemini. See: Earth Sky Winter Circle.

View the February 10, 2018  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.

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. 


YCAS 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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