Don’t expect to put your arm around Teddy Roosevelt for a selfie. Or poke a finger in a moon crater, or scrape the mighty jaw of a T. rex.

When the American Museum of Natural History reopens on Sept. 9, it will — like all cultural institutions that have been retrofitted for the Covid era — look and feel a little different.

The sculpture of Roosevelt, seated on a bench just inside a lower entryway and formerly a popular spot for photos, has been cordoned off with stanchions. Ditto the model of the moon in the Rose Center for Earth and Space, where once you could stand and learn your lunar weight.

Touch screens are off, and so are the films at the Hayden Planetarium. The hall of meteorites will stay unexplored, and the small theater tucked underneath the long, long tail of the Titanosaur will remain empty. Under the behemoth’s outstretched neck last week, a museum staff member was testing an about-to-be deployed army of automatic hand sanitizer machines. Their robotic blurp is now part of the soundtrack to many exhibition halls.

The reimagining and re-engineering of the museum experience is meant to be noticeable, and assuring, said Ellen V. Futter, the museum’s president. “We’re very keen for people not only to be safe but for people to feel safe,” she said, especially as they re-enter large public spaces for possibly the first time in many months.

Even the interactive objects that are now off-limits have been protectively spiffed up, with an eye toward the moment when they can be accessible again. Michael Meister, the director of exhibition design, was rolling through the dinosaur rooms with a cart laden with custom-made plexiglass covers, popping them on. “They’re all made to be flexible — to come right off,” he said. “The goal isn’t to hide anything or remove anything,” because the expectation, the hope, is that these adjustments will be temporary, he said.

That is a tall order when the Central Park West building normally has about 5 million visitors a year, nearly half a million of them schoolchildren. Now, capacity is capped at 25 percent, but a spokesman for the museum said they plan to go below that initially, for an even more intimate experience — allowing hundreds, not thousands, of visitors in per hour, up to about 3,500 a day. Early sales for timed tickets have been strong, he said. (The museum reopens to members on Sept. 2.)

Even for Ms. Futter, who began visiting the museum as a girl of 5 or younger, it was emotional to return. “Going in and out of its doors every single day and night, and not having done so for months, was difficult and painful,” she said. “Coming back was moving and actually very happy.”

She expects that many museumgoers may be flooded with emotion too — with nostalgia and a sense of community, relief and joy at the return, however vigilant, to a vibrant remembered life.

“The visit itself is transporting,” she said. “We let you visit everywhere, seven continents and outer space, on Central Park West and 79th Street.”

“Equally true is the enormous reassurance that there are some things that are constant — and we are one of them.”

American Museum of Natural History

The museum reopens on Sept. 9 (doors open to members on Sept. 2). Advanced purchase of timed tickets required. 212-769-5100,