- Joined Nov 3, 2018
So what happened to the water ?
Turns out this was done very differently. It was done by taking many pictures with a camera at the end of the robotic arm and then stitching them together. Since the arm was moving to do this, it was in different positions in different pictures, so it was digitally removed from the composite image. These "selfie" images allowed NASA to monitor the effects of prolonged exposure to the Martian atmosphere on the rover over time.My guess is that picture was taken by the delivery craft shortly after the rover was deployed. Notice that the tracks seem consistent with it being set down and then moving from there.
I remember the Mariner images. Those were pretty magical, too.For those of us who remember watching the first blurry, low-res images of Mars coming from the Mariner IV spacecraft, these photos are essentially magic.
I was in junior high in the run up to landing on the moon. I had dozens and dozens of posters from NASA for the Saturn V, command module, lunar excursion module, ...I tell my children and grandchildren that I was very fortunate to be born in the mid-1950s, such that I was a young kid when the space race was at its earnest, and not a single month passed without a milestone.
Something didn't seem right about the pictures from Mars being from Mariner. I kept thinking it was Viking. So I did a bit of reading and I'm pretty sure that the Mariner probes that went to Mars only orbited the planet (which I'm pretty sue is what was being referred to regarding Mariner IV). The first pictures sent back from the surface of Mars was, indeed, from the Viking lander in 1975. I recall with wonder the many pictures sent back from the various orbiters and flybys, but there was something special about those first images from Viking -- pictures being sent from the surface of another planet. If we could do that, what couldn't the human race accomplish? And then, of course, with the space race having been "won" we basically all but gave up on it.I remember the Mariner images. Those were pretty magical, too.
Yes. We've known about this for quite some time.Did Mars have water long ago ?
Mars has no magnetosphere. Without a magnetosphere it can't stop the solar wind from "blowing away" the atmosphere. With little to no atmosphere Mars couldn't hold on to liquid water.
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