Space/Science — HabitableZone

Space/Science » in reply to re: active geyser vs passive spot

re: active geyser vs passive spot
BRFelix — (archived)

The emission angle is not necessarily going to tell us much about the view we see in the images. Many apparently "overhead" images actually show the surface at a substantial side angle, which I saw explained at one point long ago, but have since forgotten. What little I recall was to the effect that images are "corrected" to a more or less standard overhead view for mapping purposes, even though they may originally show the surface at an angle.

In other words, we might actually have plenty of images of active geysering on Mars, some of them recognized long ago for what they show. Or maybe not.

As Nick suggests, it has taken an awfully long time for the topic to become mainstreamed -- especially given the discussion going on as early as 1999.

Since activity of any kind on the surface of Mars is of more than a little interest, one would think this would have been a hot topic long ago. But apparently not.

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