Resources

Weather and Viewing Conditions

Clear Sky Chart – www.cleardarksky.com Graphically shows cloud cover, transparency, seeing, darkness, wind, humidity and temperature data for specific observing sites across North America. Ability to save “favorites”.

Below are the Clear Sky Chart and Light Pollution Map provided by the MCCC Observatory located NW of Philadelphia. 

What's Up in the Night Sky This Month - by NASA Jet Propulsion Laboratory

October 2026: A Meteor Shower and the Moon Near the Pleiades. See Saturn at opposition, catch the Orionid meteor shower, and watch the Moon pass close to the Pleiades, also known as the Seven Sisters

Light Pollution

Light pollution in urban centers creates a sky glow that can blot out the stars!

BMA2 has been working through the years to increase public awareness on the issue of light pollution and its deleterious effects on many aspect of life.

We continue to engage in discussions with local administrators, collaborate with local Public Libraries, host events, and are present on Social Media to provide information on light pollution, its effects on humans and nature, and on astronomy, and way we can help limit light pollution in our communities.

Virtual Panel Discussion with Bucks-Mont Astronomical Association on Light Pollution organized in collaboration with Grundy Library, Bucks County Free Library.
Journalist Kenny Cooper, WHYY, joined our club during our September 19, 2026 public Starwatch at Nockamixon State Park, to discuss light pollution and its damaging effect on night sky astronomical observation.

Light Pollution Map of Our Area

Map below illustrates the extent of light pollution in our area. Map is from – https://www.lightpollutionmap.info/s/g7nQC9FNR8ajBrUb5zZYw

2025 – Light Pollution in Our Area

Current Phases of the Moon

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Interactive Map of our Moon

Click on the Image below for an Interactive Lunar Map.

from –  quick map.lroc.im-ldi.com

The Sun in real Time

Data from the Solar and Heliospheric Observatory (SOHO); Courtesy of NASA/SDO and the AIA, EVE, and HMI science teams – 

  • Times shown are UT (universal time) unless noted otherwise. Solar North is up in all the near real time images.
  • Credit: The sun browser was developed by Kristian Pontoppidan Larsen, an Applied Physics Engineer from Denmark.
Sun surface under visible light in real time – Click on the image to see a larger view of the sunspots.
Click on the button below to see EIT and MDI views of the sun in real time.
Sun Spots in Visible Light

Additional Weather, Sky Maps and Viewing Conditions Sites

Intellicast – www.intellicast.com Detailed weather data, tailored to your zip code. Useful radar summary shows speed and direction and height of storms

NOAA – http://www.noaa.gov Detailed weather data, tailored to your zip code. Hourly forecasts, maps, live looping radar maps

Astrospheric – https://www.astrospheric.com a rich compendium of data forecasting weather and seeing conditions for the user exact location.

Time and Date –Night Sky for Philadelphia, USA Interactive Sky map for Philadelphia. 

Miscellanea

http://science.nasa.gov/science-news/  NASA Science News

https://www.astroleague.org  Astronomy League

http://www.astronomycast.com/ Weekly astronomy podcast Southern Illinois University

http://www.worldwidetelescope.org/

Books to Get Started on Astronomy

Turn Left At Orion: Hundreds of Night Sky Objects to See in a Home Telescope – and How to Find Them – by Guy Consolmagno and Dan M. Davis

“[…]This unique guidebook to the night sky shows you how to observe a host of celestial wonders. Its distinct format of object-by-object spreads illustrates how deep-sky objects and planets actually look through a small telescope, while its large pages and spiral binding allow for use outside. Along with updated star names and astronomical information, this new edition provides links to a dedicated webpage with up-to-date tables and images, and an improved planets chapter. The many Dobsonian-friendly images and small telescope views have been revised to account for changes in modern telescope technology, such as larger field of view eyepieces.[…]” Book description from Amazon.com

NightWatch: A Practical Guide to Viewing the Universe –by Terence Dickinson and Ken Hewitt-White

“[…]Stargazing enthusiasts of all levels of experience will discover much of value in an enduring reference conceived by one of the most respected names in amateur astronomy[…]” Book description from Amazon.com 

Sky & Telescope’s Pocket Sky Atlas – by Roger W. Sinnott

“[…] a wonderfully detailed atlas so handy to take on trips and use at the telescope, thanks to its user-friendly size, convenient spiral-bound design, and easy-to-read labels. The charts show both constellation boundaries and stick figures to help you find your way[…]” Book description from Amazon.com