Planetarium Learning Center


YCAS Schedule

Public Observing




Tonight's Sky

Mason Dixon Star Party

New Telescope Users Help

Members Websites



Astronomy Classes

Offsite Events

Press Release

Star Child


Lunar Eclipse

Star Party and Astronomy Links




Back to YCAS Home

Free Public Observing Night May 10, 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 check our voice message at 717-578-9109 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 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 April 12, 2014 Night Sky for Public Observing.


The Sun sets at 7:42 p.m. this night and is located in the constellation Pisces.


The Moon this April 12th is 94.52% lit. The Moon is in the constellation Virgo. On the 14th to 15th there is a total lunar eclipse Totality occurs at 3:06 a.m.. See: Eclipse

Click Moon to see visible features

Planets Visible for Public Observing evening sky


Jupiter as public observing begins is high in the west southwest in the constellation Gemini. About 10 degrees from Jupiter are the open star cluster M-35, M-36, M-37 and M-38


Mars is at it's brightest in six years as seen from Earth this week shinning at 1.5 magnitude. Mars is rising inn the east this night located in the constellation Virgo.


Asteroids 4Vesta and 1Ceres are about 12 degrees to the left of Mars visible this night. These two asteroids are visible with binoculars.

Saturn is just starting to rise as public observing ends.


The springtime constellation of Leo the Lion hangs high overhead and just above the eastern horizon is the constellation Virgo rising. The constellation Gemini is high in the western sky. Below Gemini in the west are the fading winter constellations Orion the Hunter, Taurus the Bull and Canis Major with it's bight star Sirius which is the brightest star visible for us from earth, not counting our Sun. It takes 8.7 light years for light from Sirius to reach us, it is one of the closer stars from us. 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.

View the April 12, 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.

Back to YCAS Home