Is Mars very cold?!? It depends on the altitude...

Caption NASA originale:"This graph shows the predicted daily change in the atmospheric temperature 1 (one) meter above the surface of Mars at Gusev Crater. The blue curve denotes predicted values for Sol 1 (the first day of Spirit's mission) and the yellow for Sol 100 (100 days into the mission).
The light blue symbols represent temperatures for a total atmospheric dust abundance of 0,7 visible optical depth units, and the darker blue symbols for a total atmospheric dust abundance of 1,0 visible optical depth units.
Scientists use this data to ensure that Spirit stays within the right temperature range".

Nota: i valori di questo grafico, a nostro parere - e dopo aver confrontato tutti i dati (NASA ed ESA) disponibili - fanno apparire Marte decisamente più freddo di quanto non sia.
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