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Free Public Observing Night October 10, 2015

8:00 p.m. to 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 949-963-9147 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 Public Observing Night Sky


The Sun sets at 6:35 p.m. and is located in the constellation Virgo


The Moon on October 10th is in the morning sky and not visible for public observing.

Planets Visible for Public Observing

Saturn is visible low in the southwest evening sky in the constellation Libra "The Scales" just to the right and above the head of Scorpius "The scorpion". Saturn sets at 8:47 p.m.. Check out Saturn's rings and see Saturn's Moons!

Neptune is visible in Aquarius in the south east.

Uranus is visible rising in the east. Uranus reaches opposition, being closer, larger, and brightest this year on October 11th.

Dwarf Planet Pluto

Pluto is visible this night. Pluto is located in the Sagittarius.



The summer constellations are now visible rising in the September evening sky as twilight falls. Pegasus "The Winged Horse" is rising in the east along with Andromeda "The Princess of Ethiopia" and Aquarius "The Water Carrier". Overhead is The Summer Triangle in the evening sky. The triangle is formed by bright stars Vega in 'Lyra the Harp", Deneb in "Cygnus the Swan" and Altair in "Aquila the Eagle". In the lower south is visible Scorpius "The Scorpion", Sagittarius "The Archer", and Capricornus "The Goat". Looking to the western sky is Hercules "The Son of Jupiter" where you will find the beautiful open globular cluster of stars Messier 13 and just below Hercules is Corona Borealis "The Northern Crown", this small constellations brightest star Gemma, also known as Alphecca, is set like a jewel in the midst of the crown.  Below Corona Borealis is Bootes "The Herdsman" with its bright star Arcturus. The Big Dipper is low in the northwest sky as evening twilight ends. Using the Big Dipper to find north. See: Finding North Star. These are just a few of the many constellations visible this night.

View the October 10,, 2015  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 (949-963-9147).

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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