5 ms·

Spectral Evidence for Hydrated Salts in Seasonal Brine Flows on Mars [pdf]

33 points by mychaelangelo 11y ago

ComputerGuru 11y ago
This isn't the big news scheduled for tomorrow, is it?
- wcarss 11y ago
  My layperson's opinion is that it is. The paper reports data indicative of transient liquid salt* water flowing on current day Mars (as in, in the past year), answering the "mystery" of the apparent daily sand flows in pictures previously seen. That's sort of huge, because wow at confirming liquid water there pretty much right now, but it's also a bit of a hollow thing to reveal, as it's just solid confirmation of something strongly suspected for many months. * Exactly _what_ salt is not super clear, I think? Mg-perchlorate and Mg-çhlorate are mentioned, but the exact mineralogy isn't able to be stated from the current results.
  - waterlesscloud 11y ago
    Yeah, it's cool, but it's not really a "major announcement." Still, science marches forward.
    - jboggan 11y ago
      I think having a potential recurring source of liquid surface water is a big deal for both human and automated missions. It's rocket fuel and the stuff of life for us squishy things and not having to take so much would dramatically lower the launch weight and make long term habitations possible.
    - fsloth 11y ago
      From my perspective this is pretty major. It was not very long ago that we had no proof of liquid water on any other rock in our solar system.
      - Zardoz84 11y ago
        We know that Enceladus and Europe have liquid water.
        mastazi 11y ago
        True, but to be fair the parent said "not long ago" and this is quite the case, it was only ten years ago that we first observed vapour plumes on Enceladus, and I think Europa's subsurface ocean hypothesis started to gain traction around the same time. We live in exciting times.
        fsloth 11y ago
        The proof for both is from this millenium (from Galileo and Cassini probes). To me it's still fairly recent. While I find the principle of induction does trivialize lot of mathematical calculations I cannot apply the same principle of non-wonderment to discoveries made in the material world.
    - munchbunny 11y ago
      For those of us who don't follow these things closely while the researchers involved are forming and confirming their theories, it's pretty big news. But yes, science marches forward. Perhaps it'd march a bit faster with more funding, but so it goes.
  - wcarss 11y ago
    Just to follow up with further evidence that NASA's announcement[1] is about this research: in attendance at the conference today will be Lujendra Ojha of the Georgia Institute of Technology, the principal author of the linked paper, and Alfred McEwen, the principal investigator for the High Resolution Imaging Science Experiment (HiRISE), also with authorship on this paper (which uses HiRISE extensively). 1. https://www.nasa.gov/press-release/nasa-to-announce-mars-mystery-solved https://www.nasa.gov/press-release/nasa-to-announce-mars-mys...
iwwr 11y ago
It was already known that liquid water can exist on about half of Mars, though in a very narrow temperature range (around 0C). The green and blue bits have the adequate pressures for liquid water to exist: https://upload.wikimedia.org/wikipedia/commons/2/2c/Mars_topography_%28MOLA_dataset%29_with_poles_HiRes.jpg https://upload.wikimedia.org/wikipedia/commons/2/2c/Mars_top... Very narrow phase-space in which liquid water can exist, the yellow rectangle is conditions on Mars: https://i.imgur.com/BeDg1KM.gif https://i.imgur.com/BeDg1KM.gif

33 points by mychaelangelo 11y ago

ComputerGuru 11y ago

This isn't the big news scheduled for tomorrow, is it?

wcarss 11y ago
My layperson's opinion is that it is. The paper reports data indicative of transient liquid salt* water flowing on current day Mars (as in, in the past year), answering the "mystery" of the apparent daily sand flows in pictures previously seen. That's sort of huge, because wow at confirming liquid water there pretty much right now, but it's also a bit of a hollow thing to reveal, as it's just solid confirmation of something strongly suspected for many months. * Exactly _what_ salt is not super clear, I think? Mg-perchlorate and Mg-çhlorate are mentioned, but the exact mineralogy isn't able to be stated from the current results.
- waterlesscloud 11y ago
  Yeah, it's cool, but it's not really a "major announcement." Still, science marches forward.
  - jboggan 11y ago
    I think having a potential recurring source of liquid surface water is a big deal for both human and automated missions. It's rocket fuel and the stuff of life for us squishy things and not having to take so much would dramatically lower the launch weight and make long term habitations possible.
  - fsloth 11y ago
    From my perspective this is pretty major. It was not very long ago that we had no proof of liquid water on any other rock in our solar system.
    - Zardoz84 11y ago
      We know that Enceladus and Europe have liquid water.
      - mastazi 11y ago
        True, but to be fair the parent said "not long ago" and this is quite the case, it was only ten years ago that we first observed vapour plumes on Enceladus, and I think Europa's subsurface ocean hypothesis started to gain traction around the same time. We live in exciting times.
      - fsloth 11y ago
        The proof for both is from this millenium (from Galileo and Cassini probes). To me it's still fairly recent. While I find the principle of induction does trivialize lot of mathematical calculations I cannot apply the same principle of non-wonderment to discoveries made in the material world.
  - munchbunny 11y ago
    For those of us who don't follow these things closely while the researchers involved are forming and confirming their theories, it's pretty big news. But yes, science marches forward. Perhaps it'd march a bit faster with more funding, but so it goes.
- wcarss 11y ago
  Just to follow up with further evidence that NASA's announcement[1] is about this research: in attendance at the conference today will be Lujendra Ojha of the Georgia Institute of Technology, the principal author of the linked paper, and Alfred McEwen, the principal investigator for the High Resolution Imaging Science Experiment (HiRISE), also with authorship on this paper (which uses HiRISE extensively). 1. https://www.nasa.gov/press-release/nasa-to-announce-mars-mystery-solved https://www.nasa.gov/press-release/nasa-to-announce-mars-mys...

iwwr 11y ago

It was already known that liquid water can exist on about half of Mars, though in a very narrow temperature range (around 0C). The green and blue bits have the adequate pressures for liquid water to exist: https://upload.wikimedia.org/wikipedia/commons/2/2c/Mars_topography_%28MOLA_dataset%29_with_poles_HiRes.jpg https://upload.wikimedia.org/wikipedia/commons/2/2c/Mars_top... Very narrow phase-space in which liquid water can exist, the yellow rectangle is conditions on Mars: https://i.imgur.com/BeDg1KM.gif https://i.imgur.com/BeDg1KM.gif