woensdag 15 augustus 2012

Curiosity’s looking a little blue | Bad Astronomy

Curiosity’s looking a little blue | Bad Astronomy:
We have a fleet of spacecraft at Mars right now, including the amazing Mars Reconnaissance Orbiter and its equally amazing HiRISE camera, capable of taking very high-res pictures of the planet below.
The folks managing HiRISE just released a new picture of Mars showing the location of Curiosity, and it’ll wow you for sure:

Wow!* [Click to enaresenate.]
The colors have been enhanced in this image – which actually makes things very interesting. As I’ve pointed out before, most of Mars is covered in basalt, a blue-gray rock. When you hear about sand on Mars, it’s usually coarse-grained stuff made up of eroded basalt. However, there’s also much finer-grained dust which is high in iron oxide – rust – and it’s that which gives Mars its characteristic ruddy color.
That fine dust covers everything, making the planet red/orange/ochre. But there’s wind on Mars, and it can blow the dust around, revealing the grayer basalt underneath (like the dust devils do). And if there’s no natural wind, why, the thrusters from the rockets of a sky crane hovering over the surface as it lowers a one-ton rover ..."


It could be that only the blue patch around curiosity is without life.
Does curiosity have an extendible arm of about 10km to find life? I guess not.