SpecialSetOfSieves

joined 9 months ago
[–] SpecialSetOfSieves@lemmy.world 2 points 12 hours ago* (last edited 12 hours ago)

Thanks! They're being thorough with SuperCam and the UV imager again, even if (I suspect) they don't expect fluorescent minerals up here. I imagine this site will get the "full treatment", as Mars Guy puts it.

This latest abrasion hole, with the fair-sized mineral grains it exposes, really makes me wonder about the dark massive rocks capping the hill, which Prof. Ruff tentatively identified as ignimbrites. Everyone came into this mission jazzed about sedimentary geology, but the volanic/igneous history of this place is proving to be pretty interesting, even mysterious.

EDITED an erroneous adjective.

Someone like you, who comes into a calm, science-oriented community with F-bombs and complete cluelessness, should be able to understand this:

I didn't study geology or science for years to answer questions from the likes of you. You want a guide? F*** you, pay me.

No one owes you and your s***ty attitude a damned thing. Don't presume that your talk about "getting interested in science" is fooling anybody or represents anyone else, nor does it make up for your entitlement. Paul Hammond and other volunteers here are doing an amazing job. You want better, do it yourself.

[–] SpecialSetOfSieves@lemmy.world 4 points 1 day ago (1 children)

I don't think we need users like Linktank around here.

Aside from the entitlement and total lack of self-awareness on display here, there are plenty of science-aware people who avoid social media precisely because of this kind of cretinous toxicity. I am inclined to increase my "engagement" here, and I've actually increased my scrutiny of this mission because of respectful and genuine questions I've seen online... but when I encounter aggressive BS like this, it doesn't feel worthwhile.

The mission website and associated media can answer basic, er, "questions" like those above, but I actually do think there's more of a need to connect the dots for those who want to actually get a feel for the seriously amazing work this mission is doing. To me Lemmy doesn't seem to be the kind of place where a more detailed guide should be hosted, but I'm open to ideas for how it could be done. I've actually been working for a while on a few posts for this instance myself, but it's a time-consuming process!

Your username works very well here 😁

[–] SpecialSetOfSieves@lemmy.world 2 points 1 day ago (3 children)

They've already done an abrasion patch at the 1333 site, and given the mission's emphasis on Pico Turquino, one would assume that they're going to core here as well, but the rover team has been surprising me lately. I must say that the exposed interior we're seeing on 1334 isn't what I expected, but I'd like to see the night-time LED images before getting too caught up here.

[–] SpecialSetOfSieves@lemmy.world 2 points 1 week ago (1 children)

Interesting! CacheCam isn't used very often. Would dust on the lens impact operations significantly?

 

This episode would be a good one for introducing all those non-Martians in your life to Percy's journey, with the combination of sweeping visuals and the callback to Ingenuity's fledgling flights. Especially if you want to spend more time in the tropics.

With all the apparent lithologic diversity and patches of flattish bedrock as we've gone higher and higher up the rim, I'd be more surprised if they hadn't thought about coring. They've been shooting a lot more close-ups lately, that's for sure, and not just on the "white rocks". I assumed they were going to wait until reaching some accessible, heavy and stable boulder at Pico Turquino, and I still think they will. Nonetheless, it would be hard to miss the pretty distinct geologic units as we've sidled up to that hill, and erosion clearly has some interesting tales to tell around here. I definitely haven't been able to complain about the rover climbing too fast and blowing past interesting stuff lately.

 

... because the overhangs, and all the holes among these many boulders, would make me nervous if I was roving the slopes of this giant crater rim. We know that Percy is a very determined astro-droid, but there are too many places for tech scavengers to hide around here. Although I guess they would have to be pretty small jawas...

Link to full Mastcam-Z frame

ZOMG

We're actually backtracking?!?! What have they done with Ken Farley - has he been kidnapped?? He'd never stand for actually going back and deviating from the Mission Plan...

 

All of the above vignettes were cropped from Front Hazcam images taken on Sol 1308, at about 1 PM local time.

Given that the sun was roughly behind the camera and rover when these images were captured, the complex, light-toned surfaces of these rocks stands out, with glinting reflective patches evident, especially toward the top of the hill. I'd be intrigued to view these rocks in the late afternoon, when shadows are longer and the dusty skies of late winter aren't layering that soft sheen over everything. Given the aggressive driving schedule that the rover team has adopted for climbing the Jezero rim, though, I'm not sure that Percy will stop here for very long...

 

This shot was taken by the arm-mounted WATSON camera at 10:46 PM local time, illuminated by the LED (see also shots lit from the left and right, for perspective). The boulder Percy is analyzing (see here for a daylight view) isn't as reflective as some near the rover, but then again, this part of the Jezero rim seems to have more than enough funky rock coatings for anyone!

 

I can't find any evidence that the triangular-prismatic rock at the top centre of this image even existed before Sol 1292 (apparently visible on the left hump on the horizon in this image)... are the Martians watching us???

(To be clear, I am joking here. I just think it's really neat to see how many of these cobble and boulder-studded slopes on the Jezero rim produce these angular and seemingly resistant forms. Martian hills and mountains are pretty rounded in general - I'd hardly expect to find the Matterhorn in these ancient landscapes - but erosion has a way of surprising you in this place...

 

After reporting a while back that the SHERLOC instrument was inoperable due to a stuck, half-open dust cover, it seems that we're back in business, based on the latest images from Sol 1076 (29 Feb 2024).

I'm not sure if the engineering team will decide to leave the dust cover open, but I do know that the science team could really, really use SHERLOC, which can (and has) identified organic molecules in the rocks, including the samples we've collected. With Ingenuity losing its "wings", we can all use good news from Jezero!

 

Comparing recently downlinked images from Sol 1069 (22 Feb 2024), the partially closed (and apparently stuck) dust cover for SHERLOC seems to have opened by a few more degrees.

SHERLOC is one of the mission's primary instruments, used to detect organic molecules and identify minerals. Losing the full use of this instrument would be a problem.

The following sequence of images, taken several minutes apart, will show the dust cover's motion:

https://mars.nasa.gov/mars2020-raw-images/pub/ods/surface/sol/01069/ids/edr/browse/zcam/ZL0_1069_0761842926_818ECM_N0501618ZCAM05177_110085J01.png

https://mars.nasa.gov/mars2020-raw-images/pub/ods/surface/sol/01069/ids/edr/browse/zcam/ZL0_1069_0761844394_678ECM_N0501618ZCAM05177_110085J01.png

https://mars.nasa.gov/mars2020-raw-images/pub/ods/surface/sol/01069/ids/edr/browse/zcam/ZL0_1069_0761845258_706ECM_N0501618ZCAM05177_110085J01.png