The Japanese probe Kaguya
(Selene) has been orbiting the Moon since October 2007, and sending back gigabytes of information, including amazing HD videos like this one of Earth setting
(you can find more here
). It's now reached the end of its mission and will crash onto the Moon's surface at 18.30 GMT today
, hitting the lower right segment of the nearside, at the edge of the Moon's unlit portion. But that's not the end of the probe's scientific usefulness: the scar left by its impact will be monitored to see how solar radiation and micrometeorite impacts will alter the exposed regolith over time. And it isn't the end of the new wave of Moon exploration, either. India's Chandrayaan-1 probe
is still in Lunar orbit, and will be joined by not one
US probes later this year. No-one has announced plans to return human beings to the moon yet, but it's only a matter of time...
UPDATE: first image of impact posted here