Maria Mitchell Vestal Street Observatory Seminar Room Updates

Jascin N. Leonardo Finger • January 8, 2024

In 1987, the MMA added what was referred to as the Seminar Room Addition. It attaches to the Maria Mitchell Vestal Street Observatory (MMO) on the west side of the MMO and abuts what we have referred to as the Astronomer’s Cottage since we acquired the ca. 1830 structure in about 1922. Since 1987, the Seminar Room – so named as it provides lecture and work spaces for our astronomy interns and astronomy staff and others – has seen really no updates or changes. That is about thirty-six years – and it’s in need. We did add new work areas but it was minor changes. Now, with a gift from a descendant of Maria Mitchell’s younger brother, William Forester Mitchell, we are embarking on some updates to bring the Seminar Room into the 21st century – as we work to conserve the historic MMO.


On January 2, 2024, we began the demolition work (I hate the word demolition but this is a 1987 building so I feel a bit more comfortable.) We will be making some much needed office spaces, expanding the meeting and study space for the astronomy interns, making climate updates, improving the lighting and flooring, and making a small astronomy library space. Reminder that this is just to the 1987 space and only its interior – the historic observatory is having its own conservation focused work completed and we hope to begin to work on the interior of that portion next fall now that the exterior work was all completed this past spring. But what you are seeing in this image is the backside of the plaster and lath that makes the backside of the wall of the Astronomer’s Cottage – and the sill and other supporting timbers – pretty fun to see. It was first exposed when they added the Seminar Room addition in 1987 and removed the shingles and sheathing at that time – not something that was done this time and I wish they could have saved the sheathing boards and put the insulation between sheathing and the lathe!


Stay tuned!


JNLF

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Heat and Humidity

By Jascin N. Leonardo Finger • July 20, 2026
Being Nantucket, we tend to stay cooler than the mainland in the summer though the humidity is often over the top. It often makes me think about people in the nineteenth century and earlier – heck, even well into the mid 1900s, and how they handled the weather. With climate change, we have warmed and our weather is more severe and volatile at times. Instead of a nice gentle rain, we get a deluge and the ground has trouble absorbing that sort of onslaught. But they did did still have heat and humidity – and think of a fire in the hearth all day and the bake oven – if it was a baking day. And now, think of the women standing in front of the firebox and bake oven, or even a cook stove later on. I am sure if the confines of their home, alone, les could be worn but for the most part, those women still had a lot of layers on. I am sure that a cloth dipped into or run under the mouth of the pump and wrung out gently – to keep as much as the cool, moisture as possible – was tied around a neck or stuffed down a dress front (or even in addition to the wet neckerchief).  At the Mitchell House, we get a little of the feeling for this. We have no HVAC in the House so we rely on doors being open – with screens to keep the bugs out – and the roofwalk opened (also with a screen) so that air circulates throughout the House. Air can move nicely through – the heat rises, the air moves up and out of the roofwalk hatch very much as it might have in Maria Mitchell’s day. While we do not have the added (somewhat) drying benefit of the heat of the fire in the kitchen, we do have all of the original horsehair plaster, so the House does remain somewhat cooler and drier overall. But some days, the relative humidity does get up into the 90s in the House – that’s when I say, “Get out your umbrellas!” JNLF

Nantucket Maria Mitchell Association Nantucket Harbor Water-Quality Monitoring Buoy Joins Regional Coastal Observing Network

July 17, 2026
NANTUCKET, MA— The Maria Mitchell Association’s (MMA’s) Nantucket Harbor water-quality monitoring buoy is now part of the Northeastern Regional Association of Coastal Ocean Observing Systems, known as NERACOOS. NERACOOS is one of eleven regional associations that make up the U.S. Integrated Ocean Observing System, or IOOS, NOAA’s national ocean-observing network for gathering and sharing ocean, coastal, and Great Lakes data. This connection means that real-time data from Nantucket Harbor are no longer held only within a local monitoring program. They are now available through the NERACOOS Mariners Dashboard, where scientists, resource managers, educators, mariners, and the public can view Nantucket Harbor conditions alongside other coastal observing sites from Long Island Sound through the Gulf of Maine. The monitoring buoy carries a suite of sensors that track changing conditions such as temperature, oxygen, acidity, nutrients, and underwater light. These measurements show what eelgrass, bay scallops, and other marine organisms are actually experiencing over time. “This is an important step because Nantucket Harbor is now part of a larger coastal observing system,” said Dr. Betsy Sherman, the Maria Mitchell Association’s Senior Marine Science Advisor. “Our data can be compared with data from other sites, used in regional analyses, and placed in a broader environmental context. We are not just looking at Nantucket Harbor in isolation.” The Nantucket Harbor buoy project has been supported by the Great Harbor Yacht Club Foundation, whose early investment helped make continuous water-quality monitoring in Nantucket Harbor possible. Additional support has been provided by the Remain Nantucket Fund at the Community Foundation for Nantucket, the Osceola Foundation, the Sociable Weaver Foundation, and through collaboration with the Town of Nantucket Harbormaster. The timing is especially relevant for coastal communities because NERACOOS is also leading the newly funded NSF Seafood Engine in New England, a regional effort focused on strengthening fisheries, aquaculture, seafood technology, and coastal economies. For an island community facing changes in water quality, habitat, fisheries, and climate, joining this regional network strengthens the scientific foundation for understanding and protecting Nantucket Harbor. 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 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.  ####

Walk Accompli!

By Jascin N. Leonardo Finger • July 13, 2026
Finished. Finis. Completed. Done. Accomplished. The Mitchell House roofwalk is now done. Back to looking a bit more normal up on the ridgeline. But as I may have noted in the other post about the roofwalk, the one that was removed due to its condition and how it sat on the roof’s ridge was far from the original – or even a nineteenth century one. I am including an image from about 1908 or so in order for you to see the Mitchell House without a walk – even then. Now, an interesting fact is that I am able to date the undated photo because in the west image – where you see the open year – you can actually see the shadow of the Maria Mitchell Vestal Street Observatory – at the backside of the 1825 Kitchen. And given that shadow you also know its late afternoon since that side of the House, as noted, faces West. Another interesting feature is the long downspout – more like a side spout – that takes water from the front gutter, along the upper West façade of the House and across a window and then over the 1825 Kitchen roof where it terminated in a cistern – still in existence under the ground today. JNLF
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