(CNN) - A piece of space history is going on the auction block. It's a bag used by astronaut Neil Armstrong to bring the first sample of lunar material ever collected back to Earth.
Armstrong, of course, was the first human to walk on the moon. Sotheby's New York is offering the bag for auction.
The current owner recently sent the bag to NASA, which confirmed it's genuine, and the dust inside is indeed moon dust.
The auction will be held July 20, the anniversary of the Apollo 11 moon landing. The bag is expected to bring between $2 million and $4 million.
The current owner plans to donate part of the proceeds to charities.
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