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The OSIRIS-REx Laser Altimeter, contributed by the Canadian Space Agency, will create 3-D maps of the asteroid Bennu to help the mission team select a sample collection site. NASA's OSIRIS-REx spacecraft will travel to the near-Earth asteroid and bring at (2.1-ounce) The OSIRIS-REx Laser Altimeter, contributed by the Canadian Space Agency, will create 3-D maps of the asteroid Bennu to help the mission team select a sample collection site. NASA's OSIRIS-REx spacecraft will travel to the near-Earth asteroid and bring at least a 60-gram sample back to Earth for study.