The Astronaut Scholarship Foundation's (ASF) online 2011 Spring Auction of Astronaut Experiences & Memorabilia ends on Saturday March 26, giving investors a few more hours to get their bids in.

A Michigan flag that went to the moon and back with Apollo 15 for four days in 1971 is attracting plenty of attention, with bids having surpassed $1,000.

All three crewmembers, Al Worden, Dave Scott and Jim Irwin, are University of Michigan alumni, while Worden is also a native Michigander.

Worden inscribed the framed 12 by eight inch flag: "Flown on Apollo 15 - Al Worden CMP."

The flag carries the state's Latin mottos "Tuebor" or "I will defend", and "Si quaeris peninsulam amoenam circumspice", which translates as: "If you seek a pleasant peninsula, look around", echoing Sir Christopher Wren's epitaph in St Paul's Cathedral in London.

Worth a flutter? This Michigan flag has been to the moon

"It was an honour to represent the great state of Michigan when I became one of only 24 men to fly to the moon," Worden told ClickonDetroit.

"It continues to be an honour to show my Michigan pride and support such a worthy cause at the same time."

Space flown items are always popular with collectors. The auction also has STS-94 flown brackets and STS-82 flown gap fillers available.