LVAAS - THE LEHIGH VALLEY AMATEUR ASTRONOMICAL SOCIETY: Promoting, Facilitating and Teaching Astronomy Since 1957

Welcome to LVAAS, Anonymous
Wednesday, September 20 2017 @ 11:07 PM EDT



Megameet is rescheduled and the new date is TBD.

We will have a Pulpit Rock Field Meet this Saturday, Sept. 16.

The gate will be manned from 5 until 7 for new members who do not yet have a key.

Not a member? Email

October General Meeting at South Mountain

Sunday, October 8, 7:00 p.m. All are welcome!

Re-envisioning the Invisible:
A New Perspective on the Dark-Matter Puzzle

Brooks Thomas, Assistant Professor, Physics, Lafayette College



Overwhelming evidence now suggests that the majority of the matter in our universe consists of some exotic "dark matter" that neither emits nor absorbs light, yet makes its presence felt via its gravitational pull on normal matter. Over the years, a number of simple and elegant ideas have been advanced to explain the nature and origin of this dark matter. However, a variety of puzzling experimental results and tantalizing potential signals have recently emerged which are difficult for these simple proposals to explain. These results have motivated more complicated proposals for what the dark matter might be, and have even given birth to the idea that our universe might contain a whole "dark sector" comprising a variety of different particles with different properties, all hiding in plain sight. In this talk, I'll review what we do know about dark matter, explain why traditional ideas about dark matter are being called into question, and describe an alternative perspective on the dark-matter puzzle -- one which in some sense represents the most general approach to that puzzle which can possibly be imagined. This new perspective brings to light a variety of new possibilities for dark matter whose unusual and distinctive experimental consequences are only beginning to be explored.


—    LVAAS    —

THE LEHIGH VALLEY AMATEUR ASTRONOMICAL SOCIETY -- 620B East Rock Road -- Allentown, PA 18103 -- 610-797-3476 --


Founded in 1957, the Lehigh Valley Amateur Astronomical Society (LVAAS) is one of the oldest continuously-operating amateur astronomy organizations in the U.S. The mission of LVAAS is to promote the study of Astronomy and to maintain a meeting space, observatories, and a planetarium.

LVAAS operates two astronomy sites: The South Mountain site in Salisbury Township is the headquarters of the Society. It has a planetarium with a Spitz A3P projector, a 21 foot dome, meeting space, the Red Shift store, library, workshop space, and three observatories. The Pulpit Rock site near Hamburg is LVAAS's members-only dark sky site. At 1600 feet above sea level, the site features five observatories and a pad for member's scopes.

Members who receive training on the scopes may obtain keys to the observatories. LVAAS also maintains a rental "fleet" of telescopes that members may rent at low cost. Members also receive access to The Observer, our online newsletter, as well as reduced subscription prices to Sky and Telescope and Astronomy Magazine. If you want to learn more about astronomy and LVAAS, please join us at our next public star party.


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Pulpit Rock Clear Sky Chart         image

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Poll Topic: LVAAS 60th Anniversary Banquet

Question: If LVAAS offered a 60th Anniversary Banquet for $30 per head, at Lehigh's Mountaintop campus on Friday, November 3, how many total guests in your party would attend?

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