Czy Curiossity dotknie smug, gdzie potencjalnie może być woda?
Łazik może nie dojechać do żadnego RSL, które pojawiają się sezonowo na Marsie. Od najbliższego RSL dzieli go 5 km. Wg obecnie zaprojektowanej trasy może zbliżyć się na 2 km do RSL.
Jest też niebezpieczeństwo skażenia takiego obszaru, bo Curiosity nie został dostatecznie wysterylizowany.
Poza tym łazik nie może jeździć po pochyłościach o nachyleniu co najmniej 25 stopni.
The streaks — dubbed recurring slope lineae (RSLs) because they appear, fade away and reappear seasonally on steep slopes — were first reported1 on Mars five years ago in a handful of places. The total count is now up to 452 possible RSLs. More than half of those are in the enormous equatorial canyon of Valles Marineris, but they also appear at other latitudes and longitudes. “We’re just finding them all over the place,” says David Stillman, a planetary scientist at the Southwest Research Institute in Boulder, Colorado, who leads the cataloguing. (...)
Dundas and his colleagues have counted 58 possible RSLs near Curiosity’s landing site in Gale Crater4. Many of them appeared after a planet-wide dust storm in 2007 — possibly because the dust acted as a greenhouse and temporarily warmed the surface, Stillman says. (...)
Curiosity is currently about 5 kilometres away from the potential RSLs; on its current projected path, it would never get any closer than about 2 kilometres, Vasavada says. The rover could not physically drive up and touch the streaks if it wanted to, because it cannot navigate the slopes of 25 degrees or greater on which they appear.
But the rover’s sheer unexpected proximity to RSLs has NASA re-evaluating its planetary-protection protocols. Curiosity was only partly sterilized before going to Mars, and experts at JPL and NASA headquarters in Washington DC are calculating how long the remaining microbes could survive in Mars’s harsh atmosphere — as well as what weather conditions could transport them several kilometres away and possibly contaminate a water seep. “That hasn’t been well quantified for any mission,” says Vasavada.
http://www.nature.com/news/mars-contamination-fear-could-divert-curiosity-rover-1.20544