Maria Mitchell Association Logo

Nantucket Maria Mitchell Association and Nantucket Lights Releases Report on the Nantucket Sky Quality Monitoring Project

February 7, 2025

NANTUCKET, MA—– The Maria Mitchell Association (MMA) and Nantucket Lights are pleased to release the Nantucket Sky Quality Monitoring Project (SQM) report by Dark Sky Consulting, LLC. The joint program, launched in 2022, involves collecting night-sky brightness data from around Nantucket Island from citizen-scientists using handheld Unihedron Sky Quality Meters (SQMs) as measurement devices to study light pollution.

 

Observations were made from June 2022 to November 2024 at eight sites (Nantucket Town; Madaket Beach; Nantucket Elementary School; Nantucket Memorial Airport; Altar Rock; 'Sconset; Wauwinet; and Surfside Beach), a ninth site (Cisco Beach) was added in August 2024, for which only three months of data are available. These efforts establish a baseline for assessing the effectiveness of actions to mitigate light pollution going forward.

 

The distributions separate into two broad populations (high development: Nantucket Town; Nantucket Elementary School; and Nantucket Airport) and low/no development: (Madaket; Sconset; Wauwinet’; Surfside Beach; Cisco Beach; and Altar Rock). The darkest readings among the latter tend to occur in spring and summer. For high-development sites, the width of the distribution increases distinctly in summer and its mean shifts toward brighter values. We interpret this as due to an increased population on the island during the summer season.

 

 

 

The group follows the data collection procedure recommended by DarkSky International. Readings are taken under conditions intended to minimize interference from environmental influences. For example, reading does not commence until the end of astronomical twilight, which occurs about 90 minutes after sunset. Observers are encouraged to report only data taken under conditions of clear skies, which is sometimes not possible due to the vagaries of Nantucket weather. Additionally, they avoid obtaining data when the Moon is above the horizon to limit the contaminating effect of its light. Readings are taken after the conclusion of astronomical twilight during the week between the last-quarter and new Moon phases.

 

Analysis of the night-sky brightness measurements since 2022 show that the data are broadly valid and reproducible, and that outlier values can largely be explained by the influence of environmental conditions. Distributions of measurements across various cuts (location, year) are normal as expected for random sampling of the assumed underlying “populations” of night-sky brightness values. And there is not a great deal of night-sky brightness variation from one year to the next, either on a per-site basis or island-wide. From this, we can broadly conclude that light emissions on Nantucket have, in recent years, increased only at a very slow rate. The Nantucket Dark Sky Monitoring Project continues to be monitored, and data is being collected and analyzed.

 

You can find more detailed information on the Nantucket Island Night Sky Quality Report here:
 
Nantucket-Report-FINAL-250123.pdf


Nantucket-Annex-FINAL-250123.pdf


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

February 7, 2025

Contact: Joanna Roche

jroche@mariamitchell.org

Recent Posts

Women’s Suffrage and Lady Gaga

By Jascin N. Leonardo Finger • March 24, 2025
I have posted this during Women’s History Month before but because it is March and Women’s History Month, I think it’s worth repeating. It’s clever and helps to tell an important story in women’s history while giving it a bit of a 21 st century twist. It comes via the National Women’s History Project. http://soomopublishing.com/suffrage/ JNLF

Women’s History Month

By Jascin N. Leonardo Finger • March 17, 2025
March is Women’s History Month (though all months should be women’s history month.) Maria Mitchell was one of the founders of the Association for the Advancement of Women (AAW), was its president (1875), and founded its Science Committee, which she chaired for the remainder of her life. When the fourth Congress of the AAW met in Philadelphia in October 1876, Julia Ward Howe (also a friend of Maria’s) was serving with Maria on the executive committee. Maria presented a paper, “The Need for Women in Science.” In it she stated, Does anyone suppose that any woman in all the ages has had a fair chance to show what she could do in science? . . . The laws of nature are not discovered by accidents; theories do not come by chance, even to the greatest minds; they are not born of the hurry and worry of daily toil; they are diligently sought, they are patiently waited for, they are received with cautious reserve, they are accepted with reverence and awe. And until able women have given their lives to investigation, it is idle to discuss the question of their capacity for original work. She is not saying that women cannot be scientists – she is saying they need to be given the opportunities. Maria was incredibly busy with the AAW – it took up a great deal of her time – and at the next meeting in November of that year some aspects of the meeting were wonderful according to her account –“excellent” papers, “newspapers treated us very well. The institutions opened their doors to us, the Centennial gave us a reception. But – we didn’t have a good time!” It appears there was discord among the women. A few opposed the subject of “Woman Suffrage,” but Lucy Stone was able to present her paper on the subject despite this. And, some women felt that the West was not well represented and was overshadowed by New England thus women representing the western states protested the nomination and election of Julia Ward Howe as president of the AAW. But she won. Whew! It was not always easy and controversies constantly abounded with many schisms over time within the women’s rights movement. I often wonder what Maria might think of the place of women today – how far things have come from her time or would she be surprised that there still can be inequality? In honor of Women’s History Month, take a look at other organizations that represent different women in our history and their legacies. A good place to start is the National Collaborative for Women’s History Sites . JNLF

Nantucket Maria Mitchell Association Welcomes Tara Riley, Emma Morgan, Dr. Rich Blundell, RJ Turcotte, and Charles Johnson and March Science Speaker Series

March 11, 2025
NANTUCKET, MA—The Nantucket Maria Mitchell Association (MMA) announces that it will host Pam Murphy and Kim Shulam of the Marine Mammal Alliance Nantucket (MMAN), as featured presenters for its February Science Speaker Series. Their presentation will take place on Wednesday, February 26 at 7pm via Zoom. This event is free to all. Join Pam Murphy, the MMAN Executive Director, and Kim Schulam, the MMAN Vice President and Stranding Coordinator, in a discussion on the importance of seals and other marine mammals in maintaining a healthy marine ecosystem, and how we can all help keep these populations safe. The mission of the Marine Mammal Alliance Nantucket is to monitor, rescue, and protect marine mammals on Nantucket, advocate for their well-being, and educate the public. MMAN belongs to the Greater Atlantic Marine Mammal Stranding Network, and is among thirteen organizations dedicated to protecting, rescuing, and advocating marine mammals along the Atlantic coast from Virginia to Maine. You can learn more about the animals they rescue, their partner teams, useful tips, and statistical maps here: https://storymaps.arcgis.com/stories/5d29b842996d44eea0c4517f71ecca4d Pam Murphy has been involved in animal rescue for many years, from creating a Be Kind to Animals Club at the age of seven, to being one of the founders of Nantucket Island Safe Harbor for Animals (NiSHA) in 2011; serving eight years as board president. Her extensive board experience with TWN, NiSHA, and NAC put her in a solid position to manage MMAN’s board and see it develop into a stronger organization, capable of attracting the donor support the mission deserves. A lifelong vegetarian, Pam has never been able to stand idly by when an animal is suffering. To be allowed to approach injured and entangled marine mammals legally and help was what drew her to MMAN. She became Level A trained, learning to restrain and disentangle seals and went on to attend a Cetacean Stranding Workshop with IFAW. “I have learned a great deal about marine mammals and how to help through the vast knowledge of my teammates.” Kim Schulam began visiting Nantucket in 2013 and fell in love with the remote, natural qualities of the island. A Biological Sciences major in college, she initially considered the fields of Marine Biology or Veterinary Medicine but ultimately pursued a career as a Physician’s Assistant. Now retired from medicine, she met former Stranding Coordinator Scott Leonard and learned of MMAN. She immediately joined the team and became Level A trained. She regularly attends IFAW’s Marine Mammal Mass Stranding training, and is 24-Hour HAZWOPER certified for oil spill wildlife rescue. Now a full-time resident of Nantucket, she serves as the team’s Stranding Coordinator and Board Vice President. She coordinated MMAN’s first team-conducted large whale necropsy last year and works closely with the National Oceanic and Atmospheric Administration to maintain the team’s Stranding Agreement as Nantucket's sole agency legally permitted to handle marine mammals. She feels strongly that humans have an obligation to marine life to help them survive given all we have done to injure them and destroy their environment. Pre-registration is required to attend Zoom. To register for Zoom, use the registration link below: https://us06web.zoom.us/webinar/register/WN_7UnSEop1RKyxgl0LBio2Kw#/registration This series is generously sponsored by our lead sponsor, Bank of America.  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 ###
Show More
Share by: