Moon rocks and how to spot them

日期:2019-03-14 03:15:03 作者:王思 阅读:

By Roger Highfield Competition: Win a piece of moon rock YOU don’t have to visit the moon to hold a chunk of it in your hand. Every day around 160 tonnes of rubble from space rains down on Earth, and some of it comes from the moon. All you need to find a piece of moon rock is keen eyesight, patience and an expanse of ice or desert against which a dark little chunk of our neighbour will stand out. In this issue’s Feedback you’ll find details of a competition to win just such a piece of the moon, worth more than £1000. The prize is part of a lunar meteorite found by French collector Luc Labenne, who has been scouring deserts for meteorites since 1997. Labenne found the rock, known as Dhofar 458, on 3 April 2001 in the gravel plains of southern Oman’s Dhofar (or Zufar) region, and it was authenticated as a lunar meteorite by researchers at the University of California, Los Angeles. Before handing our piece over we wanted to use this opportunity to find out first-hand just how tricky it can be to distinguish a fragment of moon rock from a common or garden meteorite. For this we turned to researchers at the Open University (OU) in Milton Keynes, UK. Meteorite hunters like Labenne follow an approach pioneered in the 1930s by the American collector Harvey Nininger,