On 9th October, 2009 as part of NASA'S Historic Mission to Moon “Lunar Crater Observation and Sensing Satellite ("LCROSS") and its Centaur booster rocket would have double-impact on surface of Moon. This impact on crater's floor is designed to "unearth" signs of lunar water. According to NASA the satellite and upper stage both are scheduled to hit a permanently shadowed crater of the moon called Cabeus, four minutes apart approximate time of impact would be 4:30 a.m PDT i.e. 5 P.M. Indian Standard Time on 9th October,2009. Significance : This impact event grabs all significance as it comes after Historic announcement of NASA that the Moon Mineralogy Mapper, or M3, an instrument aboard the Indian Space Research Organization's Chandrayaan-1 spacecraft, discovered water molecules in the polar regions of the Moon. As you know the announcement was confirmed with support of Data from NASA's Cassini spacecraft and NASA's Epoxi (originally Deep Impact Mission) spacecraft. Before we go any further here is a bit of info United Nations World Space Week 4th -10th Oct : World Space Week is an annual observance held from October 4 to October 10 established by the United Nations General Assembly to be an international celebration of science and technology and their contribution to the betterment of the human condition. World Space Week is coordinated by the United Nations Office for Outer Space Affairs. Society has prepared school kit, media kit regarding this impact as part of World Space Week celebrations in order promote awareness about lunar exploration and in true spirit of International Year of Astronomy 2009. Here is the Video compiled by society sourced from NASA: So What is LCROSS OR LRO ? When were they launched ? Lunar Reconnaissance Orbiter (LRO) and Lunar Crater Observation and Sensing Satellite (LCROSS) are the first missions launched as part of the United State’s Vision for Space Exploration program. Launched on 18 June 2009, in conjunction with the LCROSS, as the vanguard of NASA