Bag with traces of moon dust to go on sale

Last updated at 11:08
Bag used to take moon dust back from Apollo 11 missionSothebys

Two years ago, this small bag was bought for $995 US dollars. Now, it's going on sale and could be sold for $4 million dollars! So what's so special about it?

On the Apollo 11 mission in 1969, US astronaut Neil Armstrong became the first person to ever walk on the moon.

He collected 12 pieces of rock and nearly 500 grams of material from the surface of the moon and kept it safely in this bag.

The moon dust and rocks were sent to a lab where the bag was thought to be lost.

Astronauts Neil ArmstrongNASA
Crew of the Apollo 11 lunar landing mission: Neil Armstrong (left), Michael Collins (centre) and Edwin Aldrin junior (right)

Years later, the bag turned up on an auction website and was bought, along with some other items, for $995 dollars by Nancy Lee Carlson.

She sent it off to Nasa to be tested, where they found traces of moon dust still on it!

This year, on the anniversary of the Apollo 11 mission in July, the bag will go in the Space Exploration auction at Sothebys in New York, America.

Astronaut Neil Armstrong's footprint on the surface of the moonNASA/Newsmakers
Astronaut Neil Armstrong left the first human footprint on the moon on 20 July 1969

As the most important item at the auction, we'll have to wait and see how much it sells for!