The U.S. Mint has issued a quarter-dollar coin celebrating the life and work of the codiscoverer of dark matter in galaxies.

Quarter with Vera Rubin
The front of this 2025 U.S. quarter-dollar coin features the first U.S. president, George Washington; the S under the date indicates that it was minted in San Francisco. The back features pioneering astronomer Vera Rubin and highlights her most famous achievement: the discovery that spiral galaxies contain huge quantities of unseen dark matter. The artist’s and sculptor’s initials are inscribed there too.
U.S. Mint

The late astronomer Vera Rubin has an observatory named for her, and it’s on track to begin a 10-year sky survey from atop Cerro Pachón in northern Chile later this year. Now she also has a U.S. quarter-dollar coin with her likeness on the reverse. You don’t need to wait to get one in change at a convenience store — you can order some directly from the U.S. Mint.

Rubin’s coin was minted as part of the American Women Quarters series, launched in 2022 to honor “extraordinary women whose achievements, triumphs, and legacies reflect the strength and resilience” of the United States, according to a May 27th press release from the U.S. Mint. Five women have been celebrated each year, and the 2025 group is the last. The 2022 cohort included physicist-astronaut Sally Ride; Rubin is the only astronomer to be memorialized in the series, which wraps up this year.

“Dr. Rubin gathered crucial data to support the existence of the unseen material that binds entire galaxies together and is believed to make up more than 80 percent of the mass of the universe,” said Kristie McNally, the mint’s acting director, in the same press release. As with all U.S. quarter coins, George Washington’s profile appears on the obverse (front side). The reverse (back side) design features a profile of a smiling Rubin gazing upward with stars and a spiral galaxy in the background. Her name and the words “Dark Matter” appear too.

Artist Christina L. Hess designed the image, and John P. McGraw sculpted the mold. “Dr. Rubin's story exemplifies strength, dedication, and determination, and it was a great honor to illustrate her portrait and legacy,” said Hess in a statement. “By positioning her portrait off-center and toward the upper right, I aimed to move the audience’s gaze upward, symbolizing exploration beyond the coin's boundaries, evoking a sense of infinite possibility and continuous motion.”

Uncirculated Vera Rubin quarters are available in rolls of 40 and bags of 100. You can also get them in sets of five quarters, one featuring each of the women honored in 2025; these are proof quality (struck using specially prepared dies and blanks to produce a highly detailed, mirror-like finish) and come in regular (copper-nickel alloy) and 99.9% silver versions. American Women Quarters from 2022, 2023, and 2024 remain available too.

Proof set of five new quarter coins featuring American women
Proof sets of the American Women Quarters for 2025 feature one coin for each of the year’s honorees: journalist, suffragist, educator, and civil-rights leader Ida B. Wells; Juliette Gordon Low, founder of the Girl Scouts of the USA; pioneering astronomer Vera Rubin; disability justice activist Stacey Park Milbern; and athlete Althea Gibson, who broke the color barrier in professional tennis and golf.
U.S. Mint

In case you’re wondering, it would take 2.284 billion Vera Rubin quarters to cover the $571 million cost of the Vera Rubin Observatory.

About Richard Tresch Fienberg

Rick Fienberg served as Sky & Telescope’s Editor in Chief from 2001 to 2008 and continues to support the magazine as Senior Contributing Editor and as Senior Advisor to the CEO of the American Astronomical Society, S&T’s publisher.

Comments


Image of Greg-Taylor

Greg-Taylor

June 4, 2025 at 5:43 pm

I met Vera Rubin at a conference in 2009. I might have to get myself some of these.

You must be logged in to post a comment.

Image of MeadeLX200

MeadeLX200

June 6, 2025 at 4:31 pm

I will DEFINITELY get some of those silver quarter's and keep them in a safe and show them to people at the Star parties I host or am asked to attend. Thank you SKYNTELESCOPE for bringing us such a great story.

You must be logged in to post a comment.

Image of Enrico the Great

Enrico the Great

June 13, 2025 at 5:40 pm

Thanks---this looks interesting!

You must be logged in to post a comment.

Image of DJSailorVA

DJSailorVA

June 6, 2025 at 10:08 pm

Guess you are asleep then. Good night and hope you can see the stars where you are. You just have to look up!

You must be logged in to post a comment.

Image of Andrew James

Andrew James

June 7, 2025 at 4:38 am

As practically encountered in the world, it is full of defects, some of them amounting to organic disease, others fail to see reality. Vera Rubin was a brilliant astronomer, but her contributions has been just hijacked by the feminist twisted agenda to elevate woman equality against its obvious biassed irrelevance. e.g. she discovered that galaxies didn't behave as they should, which is assumed to be the origin of dark matter, and even though dark matter hasn't been discovered or explained as yet. Finding galaxy rotation curves does not mean or equate to dark matter. The coin in its essence is purveying a false impression that she discovered dark matter. It is a gross distortion. Perhaps I am asleep, but least I'm not dead (nor stupid).

You must be logged in to post a comment.

Image of Enrico the Great

Enrico the Great

June 12, 2025 at 1:35 pm

Vera Rubin was talented and did encounter sexism--for lack of a better term. BUT the "anomalous" nature of the various galaxies' rotational curves was known as far back as the 1930s. On the whole I would say that she does deserve her accolades, but perhaps so do others going back to Fritz Zwicky.

You must be logged in to post a comment.

Image of Monica Young

Monica Young

June 13, 2025 at 4:32 pm

Fritz Zwicky observed the rotation of galaxies in galaxy clusters, not within galaxies. Vera Rubin (and her colleague Kent Ford, who built the instrument they used to make the observations) provided definitive evidence showing that the same phenomenon occurs *within* galaxies. See this quick review for more details: https://ned.ipac.caltech.edu/level5/Sept17/Freese/Freese2.html

You must be logged in to post a comment.

Image of Enrico the Great

Enrico the Great

June 13, 2025 at 5:41 pm

Thanks---this looks interesting!

You must be logged in to post a comment.

Image of Enrico the Great

Enrico the Great

June 27, 2025 at 1:12 pm

Thanks, I had misunderstood, or misremembered the type of work Fritz Zwicky did. The article you shared was a good refresher on it, and other aspects of this topic. Also shows Vera Rubin's role in this work.

You must be logged in to post a comment.

Image of Justin

Justin

June 13, 2025 at 12:30 pm

Upset over a quarter. . . find joy in the fact that a lot of your fellow citizens are applauding with you over the defunding of science in the U.S.. With any luck, they'll be renaming any future construction funded by the U.S. govt. after your fuhrer, and all money will be made to have his likeness on it.

You must be logged in to post a comment.

Image of Andrew James

Andrew James

June 15, 2025 at 5:51 am

Thanks for the deleted comment. Vera Rubin did not discover dark matter. Thank you.

You must be logged in to post a comment.

Image of Enrico the Great

Enrico the Great

June 27, 2025 at 1:24 pm

But she DID do work which confirms dark matter's presence.

You must be logged in to post a comment.

You must be logged in to post a comment.