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Congratulations to the Japanese Space Agency! On Friday morning (EST) the Japanese space probe Hayabusa2 dropped two adorable little hopping rover bots (“hoppers”? “hop-overs”? “hop-bots”? um, we’ll work on it…) onto the surface of Asteroid Ryugu. The spacecraft arrived at the near-Earth asteroid back in June when the sort-of-octahedral space rock was passing near to our home planet. The twin “MinervaII” probes (“Micro Nano Experimental Robot Vehicle for Asteroid”) are 18 centimeter (7 inch) disks which weigh 1.1 kilograms (2.4 pounds) each. Making use of the asteroid’s exceedingly low gravity, the tiny robots will hop to their location and deliver readings about the composition of the ancient icy rock, which will hopefully provide insight into the formation of the solar system. Additionally, more stirring action is on the way in October when Hayabusa II will deliver a larger lander (named Mascot!) and then a third Minerva lander. This flurry of activity is in preparation to collect asteroid material which will be returned to Earth!
Hopefully….the MinervaII probes are (unsurprisingly) the second in a line of Minerva probes. The first Minerva hopping robot met an inglorious fate during the first Hayabusa mission to the asteroid Itokawa in 2005. That (smaller) Minerva rover was deployed a bit early and hopped ignominiously into the void of space. Sadly I don’t have pictures, but imagine a hockey puck falling into infinite blackness.
I will follow up with more news about this mission as it becomes available, but for now let us celebrate!
ferrebeekeeper 