Apollo 11 Hasselblad image from film magazine 40/S - EVA  Photograph by NASA

Moon Dust Collected By Neil Armstrong Hits the Auction Block

Jul 13, 2017

A bag containing dust and rocks from the lunar surface is expected to fetch some astronomical bids when it goes up for auction on July 20.

Sotheby's, which is hosting the auction, estimates the sample bag, which was used by Neil Armstrong to collect soil samples on the Apollo 11 mission and still contains moon dust and small rocks, will sell for between $2 million and $4 million. The samples were the first ever collected from the moon.

It's an exceptionally rare piece of history. Virtually everything from that historic mission is held by the Smithsonian, but a recent court ruling allowed this bag to be the only privately held artifact, says Sotheby's.

Ironically, just three years ago, the Armstrong moon dust bag failed to find a bidder at a U.S. Marshall's service auction. In 2015, it was bought as part of a lot, which sold for $995. The owner, curious about the piece, sent it to NASA to learn more about it. Tests at the space agency confirmed the debris inside was moon dust from the Apollo 11 landing site and the bag had made the flight with Armstrong and "Buzz" Aldrin.

Among the other items up for bids at the auction are the flown flight plan for Apollo 13 (with extensive annotations from the crew), which is expected to go for $30,000 to $40,000, and the records file for Russian Cosmonaut Yuri Gagarin, which may garner $50,000 to $80,000.

All products and services featured are based solely on editorial selection. FORTUNE may receive compensation for some links to products and services on this website.

Quotes delayed at least 15 minutes. Market data provided by Interactive Data. ETF and Mutual Fund data provided by Morningstar, Inc. Dow Jones Terms & Conditions: http://www.djindexes.com/mdsidx/html/tandc/indexestandcs.html. S&P Index data is the property of Chicago Mercantile Exchange Inc. and its licensors. All rights reserved. Terms & Conditions. Powered and implemented by Interactive Data Managed Solutions