LVAAS General Meeting

Sunday April 2, 7 p.m. at LVAAS South Mountain Grady Planetarium 

and on Zoom. 


Chromospheric Activity in Sun-like Stars

and the Mystery of the Maunder Minimum

Anna Baum

The Sun's magnetic activity consistently fluctuates on an 11-year cycle.
The only exception to this was the Maunder Minimum in the 1700’s, when the Sun’s cycle flatlined,
and almost no sunspots were observed for 80 years. 

Activity cycles in other stars like the Sun have been observed for years,
leading to the recent discovery of another star like our Sun,
entering a mysterious Magnetic Maunder Minimum. 


Anna Baum is a 3rd year Physics PhD student at Lehigh University.
She graduated from Penn State University in 2020 with a Bachelor of Science in Astronomy & Astrophysics.
In 2022, she published a paper on the chromospheric activity in Sun-like stars
and the discovery of a star entering a Maunder Minimum.
She is currently conducting research on eclipsing binary stars and asteroseismology,
and is always excited to learn more about stars.



Prospective new members who wish to attend the meeting should email



—    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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