Nantucket Maria Mitchell Association Welcomes Gail Walker, Geoff Clayton, and John Barentine as Featured Guests for the January Science Speaker Series, “How Dark is Nantucket’s Night Sky?”

January 13, 2025

NANTUCKET, MA—The Nantucket Maria Mitchell Association (MMA) announces that it will host Gail Walker, Geoff Clayton, and John Barentine, with moderator, Joanna Roche, as featured presenters for its January Science Speaker Series. Their presentation will take place on Wednesday, January 22 at 7pm via Zoom. This event is free to all.

 

“How Dark is Nantucket’s Night Sky?”

Join Gail Walker, founder of Nantucket Lights, Dr. Geoff Clayton, Interim Director of Astronomy at the MMA, and Dr. John Barentine, founder of Dark Sky Consulting, in a panel discussion moderated by the MMA’s Executive Director, Joanna Roche. Learn about the Nantucket Sky Quality Monitoring Project, a joint initiative of Nantucket Lights and the MMA launched in 2022 to collect ground-based measurements to determine how dark Nantucket's night sky is. The data collected to date establishes a baseline for assessing the effectiveness of efforts to mitigate light pollution going forward — and helps us understand how close we are to losing the ability to see the Milky Way with the naked eye. 

 

Nantucket Lights and the MMA will be explaining how this project works and plans going forward. John Barentine, retained to independently analyze the data collected so far, will discuss his findings and recommendations. 

 

Gail Walker is the founder and president of Nantucket Lights (https://nantucketlights.org), an all-volunteer, citizen advocacy group exclusively dedicated to preserving and protecting Nantucket’s nighttime environment and heritage of dark skies. A long-time summer resident of ‘Sconset, she began working on light pollution as a board member of the 'Sconset Civic Association following her retirement from the U.S. Department of Justice where she was a trial attorney for almost twenty years. In addition to leading Nantucket Lights, Walker serves on the Executive Committee of the Nantucket Civic League. 

 

Geoffrey Clayton received his Ph.D. in Astronomy and Astrophysics from the University of Toronto. He has worked for the Universities of Wisconsin and Colorado, as well as for NASA. He spent twenty-seven years as a professor at Louisiana State University. His association with the MMA goes back almost sixty years. He attended lectures and attended Open Nights at the MMA when he was a child visiting Nantucket. He still appreciates the dark skies of Nantucket now that he lives on the island full time. 

 

John Barentine is the Principal Consultant and Executive Officer at Dark Sky Consulting, LLC. He earned a Ph.D. in astronomy from the University of Texas at Austin and previously held staff positions at the National Solar Observatory, Apache Point Observatory, the Sloan Digital Sky Survey, and the International Dark-Sky Association. He is a member of the American Astronomical Society (AAS), the International Astronomical Union (IAU), and the Illuminating Engineering Society (IES), and is a Fellow of the Royal Astronomical Society (RAS). He serves on light pollution committees of the AAS, IES and IAU, and co-leads the Community Engagement section of the IAU Centre for the Protection of the Dark and Quiet Sky from Satellite Constellation Interference.

 

Pre-registration is required to attend Zoom. To register for Zoom, use the registration link below:

https://us06web.zoom.us/webinar/register/WN_--Lju9KeTGGrxRJ4Dzihzw



The Maria Mitchell Association was founded in 1902 to preserve the legacy of Nantucket native astronomer, naturalist, librarian, and educator, Maria Mitchell. After she discovered a comet in 1847, Mitchell’s international fame led to many achievements and awards, including an appointment as the first female professor of astronomy at Vassar College. Maria Mitchell believed in “learning by doing” and today that philosophy is reflected in the MMA’s mission statement, programs, research projects, and other activities. The Maria Mitchell Association operates two observatories, a natural science museum, an aquarium, a research center, and preserves the historic birthplace of Maria Mitchell. A wide variety of science and history-related programming is offered throughout the year for people of all ages


###

For Immediate Release

January 13, 2025

Contact: Joanna Roche

jroche@mariamitchell.org

Recent Posts

By Jascin N. Leonardo Finger August 17, 2026
August 19 {1857}. There are four great men whose haunts I mean to seek, and on whose footsteps I mean to stand: Newton, Shakespeare, Milton, and Johnson. To-day I told the driver to take me to St. Martin’s, where the guide-book says that Newton lived. He put me down at the Newton Hotel, but I looked in vain to its top to see anything like an observatory. I went into a wine-shop near, and asked a girl, who was pouring out a dram, in which house Newton lived. She pointed, not to the hotel, but to the house next to a church, and said, “that’s it – don’t you see a place on the top? That’s where he used to study nights.” It is a little, oblong-shaped observatory, built apparently of wood, and blackened by age . . . .” Blackened no doubt by the wood ash and soot found in the air throughout over-crowded nineteenth century London. We always think about London being very foggy in the nineteenth century but frankly a lot of it was wood and coal ash as the nineteenth century grew older, particularly as factories developed and belched all of that into the air – think Sherlock Holmes in the 1880s. But Maria Mitchell, while starting in Europe as a young woman’s chaperone, also knew that this tour of Europe was a great learning experience – the equivalent of a college education she could not have. Doors were thrown open to her around Europe – in particular at all of the observatories that dotted the continent. She was not just well-known – she was famous. JNLF
By Jascin N. Leonardo Finger August 10, 2026
This is a blog of the past. I often think of this “story” when it’s hot and humid out. So here it is again. The past few weeks have been very un-Nantucket as far as the heat and the extreme humidity. When I was a child and even a teenager, I remember that we always wore long pants and even sweaters in the summer evenings on island. This does not seem to be the norm any longer unfortunately. The heat also leads me to think about staying cool and what generations before us did to preserve food. Long before modern refrigeration, ice was used for preserving foods. Although the use of ice brought an end to salting and drying fish for local markets, with railroad development and western expansion in the 1850s, salt fish was still being shipped to inland domestic markets as well as abroad. As the fishing industry grew on Nantucket and elsewhere, however, so did the need for ice to keep the catch fresh for market. On Nantucket, when a hard freeze produced ice of the necessary thickness, blocks were cut from Maxcey’s and Washing Ponds and the North Head of Hummock Pond and stored in nearby icehouses. This was a fairly long and tricky process that took skill to make sure the ice was the right thickness and that one did not fall through the ice. Mainland icehouses typically used sawdust for insulation, but Nantucket ice was insulated with beach grass, seaweed, and eelgrass—sawdust not being readily available here. The iceman would drive his cart around the streets with usually a gaggle of children trailing behind – or hitching a secretive ride on the back of the cart – hoping for a piece of ice to suck on and cool off with – back when something that simple was a pure delicacy. When electricity was introduced on Nantucket in 1889, cutting pond ice was no longer necessary. Captain John “Jack” Killen built the first ice-making plant, on Straight Wharf, opening it on May 5, 1902. Several other plants, including that of the Island Service Company, followed—all operating until the Great Depression. Nantucket’s early ice-making plants were established primarily for packing fish and shellfish, which were shipped in barrels or fish boxes layered with ice. Fishermen both on and off-island would stock up on ice before going out on long trips, and it is said that island ice was of a much higher quality than that from plants off-island—perhaps because of the purity of Nantucket’s water. Some people still cut ice. My parents had an elderly friend, now gone, and his family owned – and I assume still owns – a camp of cottages from the 19 th century up in New Hampshire. In the winter, the entire family shows up to harvest ice and store it in the icehouse. The ice is then used in each of the cottages during the summer since they have no electricity or plumbing. It is an art that is almost gone but happily there are still a few who have passed down the knowledge and skill for harvesting ice. I recently took a look at his obituary and was blown away – I remember him for ice harvesting – but wow what a life! One of service and seeking justice. JNLF
August 3, 2026
“If you don’t look, you don’t see. You have to go and look.” -Edith Andrews
Show More