喜欢天文的tz注意了，本周五NASA将进行有史以来最大规模月球撞击实验。
Get ready for a unique cosmic collision! Early Friday morning, NASA's Lunar Crater Observation and Sensing Satellite will end its mission with a bang — literally.
The probe — also known by its acronym, LCROSS — is currently carrying along the upper stage of the rocket that launched it on its way to the moon on June 18. NASA's game plan is to send that spent rocket motor on a course to smash into the lunar surface. Not just anywhere on the lunar surface, but to a thoroughly scrutinized crater called Cabeus that lies near the moon's south pole and is enveloped in perpetual darkness. The hoped-for result will be to find hidden water frozen inside the crater.
For seasoned skywatchers here on Earth, the event should also produce a visible cloud of ejected material. However, only knowledgeable amateur astronomers with the right equipment will be able to detect the event. Others can watch the event live on NASA TV.
The impact is scheduled to occur this Friday, Oct. 9, at 7:30 a.m. ET. That's 4:30 a.m. PT, or 11:30 UT. （查了一下，是悉尼时间晚上6.30.天还没黑，不知道能不能看到）
Impact will occur less than 10 hours after the spent Centaur rocket motor is released and the LCROSS "shepherding spacecraft" maneuvers into position to trail the Centaur en route to the lunar surface. The 5,000-pound (2,270-kilogram) Centaur is expected to slam into Cabeus at a sharp angle at a speed of 5,600 mph (9,000 kilometers per hour).
喜欢天文的tz注意了，本周五NASA将进行有史以来最大规模月球撞击实验，用普通天文望远镜便可以观察到。
Get ready for a unique cosmic collision! Early Friday morning, NASA's Lunar Crater Observation ... [/quote]
谢谢消息