Earlier quoted context omitted.
My question is why was the “sound of Mars” release only 18 seconds long? Why not record hours of what it sounds like to be on another planet? Even the sound recordings from decades ago on (I think Titan) was only a short creepy clip. I understand it’s mostly going to be wind and interspliced with the robots sounds but I still don’t get how we don’t have hours of Mars already.
My guess would be bandwidth. Every bit of bandwidth is precious, so they probably dont have the spare budget to send long audio files without obvious scientific value...
NASA's Perseverance rover sends stunning images
221–230 of 365 posts
Re: NASA's Perseverance rover sends stunning images
#222This is a video presenting ten milestone images that revealed what we've learned about Mars after decades of exploration prior to the landing of Perseverance [1]. It's nice to see the evolution of image resolutions of the Red Planet. [1] https://www.youtube.com/watch?v=e1eFMzO3iPc
Similar, a gf capturing the evolution of our knowledge of Puto in somewhat less than a century: https://i0.wp.com/www.nasa.gov/sites/default/files/styles/fu...
Re: NASA's Perseverance rover sends stunning images
#223Earlier quoted context omitted.
a glowing green sandwich covered in red sand. But seriously, this stuff is powering those voyager probes 40 years later. Which makes me ask: why do we have to send there technologies 10 billion miles away to make them work? Why can't my fridge be powered this way?
Why can't my fridge be powered this way The MMRTG is a cylinder 25" in diameter and 26" high, it's going to seriously impact space in your 'fridge. Plus it weighs nearly 100 lbs. It outputs around 100W of power, which might be enough for a small refrigerator, but it also emits around 2000W of thermal energy, so your kitchen's going to get a little warm (probably a good thing in the winter, not so much in summer). Tho…
Not just the obvious ones (checking if you aren't selling plutonium or making a dirty bomb), but also health agencies (what if it leaks and someone eats it?), environmental agencies (what if it leaks and gets into groundwater?), child protective services (are you really storing nuclear material in reach of children?!), drug enforcement (are these parties near your "glo fridge" legal and above board?)...
On the bright side, as the joke goes, being on the radar of government agencies is a good way to deter criminals from robbing your house.
Re: NASA's Perseverance rover sends stunning images
#224Earlier quoted context omitted.
a glowing green sandwich covered in red sand. But seriously, this stuff is powering those voyager probes 40 years later. Which makes me ask: why do we have to send there technologies 10 billion miles away to make them work? Why can't my fridge be powered this way?
Why can't my fridge be powered this way The MMRTG is a cylinder 25" in diameter and 26" high, it's going to seriously impact space in your 'fridge. Plus it weighs nearly 100 lbs. It outputs around 100W of power, which might be enough for a small refrigerator, but it also emits around 2000W of thermal energy, so your kitchen's going to get a little warm (probably a good thing in the winter, not so much in summer). Tho…
https://mars.nasa.gov/mars2020/spacecraft/rover/electrical-p...
Re: NASA's Perseverance rover sends stunning images
#225Earlier quoted context omitted.
From my layman's understanding, it's relayed via the orbiters. There are a few orbiters around Mars. NASA appears to have an arrangement with the ESA to upload data from the rovers to the ESA's orbiters, depending on whose orbiters are within line of sight at any given time. Then the orbiter sends the information back to Earth, which are received by NASA's Deep Space Network During the time when line of sight between…
It never ceases to impress me that we have the ability to do this sort of stuff. A couple thousand years ago, the height of technology was shooting something from a few hundred metres away with a bow and arrow, now we are landing machines on another planet and transmitting data back and forth through the solar system. Incredible.
Re: NASA's Perseverance rover sends stunning images
#226Earlier quoted context omitted.
Economies of scale would surely change that though?
I was thinking it would be fun to buy some uranium 238 (you can have up to ~7kg of it without a license). Then I tried ddg'ing what it would cost to dispose of. I couldn't find an answer, so I decided buying uranium wasn't a good idea. It's hard enough getting rid of an old lead-cell battery.
I went searching and this website on watch lists appears to be real, whilst also seeming like a joke.
“Since there are many reasons why a traveler may seek redress, DHS TRIP works with the TSC, as appropriate, when an inquiry appears to be related to the watchlist.
The TSC does not accept redress inquiries directly from the public. Instead, members of the public should contact the relevant screening agency with their questions or concerns about screening.”
https://www.fbi.gov/about/leadership-and-structure/national-...
Re: NASA's Perseverance rover sends stunning images
#227Earlier quoted context omitted.
It's not about doing the best thing, it's about doing something . You don't have to perfectly efficient, just take simple actions that reflect the change you want to see. We all have limited time and energy, if you see something positive you can do you shouldn't dismiss the idea of doing it just because you could sell all your belongings and become an eco-warrior and be maximally efficient in pursuing a positive deve…
Why though, if you're not going to make a difference? Why bother? The reality is that the reason we do these things is to make ourselves feel better. Ah, yes, my daily shot of endorphins from recycling. Ah yes, my bumper sticker makes sure everyone knows I'm one of the good ones -- my social standing is safe. This philosophy is why middle class first world kids pay thousands of dollars to go on missionary trips to bu…
Speak for yourself my friend. The idea that people only make changes, even little ones entirely out of self service is extraordinarily cynical and a very negative and sad view of the world.
Sometimes people just do good things, because they want to improve some minor aspect of our world, or make someone elses (or somethings) day a little bit nicer. Sometimes people do this entirely without the desire to praise themselves or be praised by someone else.
It still exists, but by it's nature you don't often see it. And if you don't believe it exists, even when you do catch a glimpse of it you wouldn't notice or care.
> I think it's all hollow. If you aren't making a real impact -- actually moving the needle -- you are doing nothing. It's just a vanity.
Say on my walk to and from work every day I pick up one single piece of litter and quietly put it in the bin. I do this every day, 5 days a week, 50 weeks a year. That's 500 pieces of litter. Every day those little actions aren't moving the needle at all, but at the end of the year I've actually managed to make a tiny little nudge to my environment around me. Say I tell my friend and they decide to do the same thing, now it's 1000 pieces of litter. They tell 2 of their friends, now it's 2000 pieces of litter. Then I decide to make it 2 pieces of litter, and I tell my friend and they pass it on. Now it's 4000 pieces. They start telling their friends. And so on and so on. The individual action barely nudges any needle, but just because you don't see it doesn't mean it isn't moving some needle even slightly. You just don't have strong enough vision.
> I believe in donating money to causes that have high impact. Given my skillset, I'm confident that's by far the best thing I can do. And aside from that, I don't sweat the small stuff. I have a keurig. Yep you heard right. Also donated enough to save a few lives from malaria. Exactly one of those facts about myself made any difference at all to the world.
You don't exist in a vacuum, and my whole point of all my comments is that individual action drives collective change. One person making minor adjustments on it's own is nothing, but if many of those singular people decide to make changes it can lead to amazing things. You can choose to make whatever change you please, I'm glad you believe in some action. But let me ask you, what change do you think you're making by stomping on the idea that multiple little changes can lead to positive effects? Why expend the energy if it's pointless anyway?
Things can be better, and people should try and make as many little positive changes as they can to the world. No person is smart enough, or has enough foresight or knowledge to be able to predict what that may lead to in the future, and personally I choose to be optimistic because why waste my life believing that anything better is a futile mission?
Re: NASA's Perseverance rover sends stunning images
#228Earlier quoted context omitted.
It never ceases to impress me that we have the ability to do this sort of stuff. A couple thousand years ago, the height of technology was shooting something from a few hundred metres away with a bow and arrow, now we are landing machines on another planet and transmitting data back and forth through the solar system. Incredible.
Incredible for me, too. The power of building the civilization, one generation after another, and of working together, sharing the knowledge.
In all seriousness, it's impressive what knowledge sharing and cooperation achieves.
Re: NASA's Perseverance rover sends stunning images
#229But I thought all works created by the US federal government are public domain and not protected by copyright?
Famously the "Blue Marble" photo is not under copyright and reproduced all over the place: https://en.wikipedia.org/wiki/The_Blue_Marble