Why people make temperature in space a big deal? It's mostly vacuum and has no heat capacity. Sun radiation is the real threat, but the concept of temperature can't even be applied to vacuum.
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Athena landed in a dark crater where the temperature was -280° F / -173° C
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Re: Athena landed in a dark crater where the temperature was -280° F / -173° C
#212Re: Athena landed in a dark crater where the temperature was -280° F / -173° C
#213Earlier quoted context omitted.
Had two. One showed so much measurement noise they couldn't trust it, other kept cutting out. Not great.
So three ones, two different models, one in a different location. These are like... basics, no?
If you multiply every critical component by 3x there will be no room left for anything else.
Re: Athena landed in a dark crater where the temperature was -280° F / -173° C
#214Earlier quoted context omitted.
I hear you, but it's a classic generic tangent—in fact a classic generic flamewar tangent. HN commenters are asked to resist those - see https://news.ycombinator.com/newsguidelines.html - even though it borders on irresistible. Edit: but I've put the Celsius number in the title now as well...hopefully that will reduce the swelling.
I noticed it didn't have the Celsius value at the beginning, and a while later I noticed it was there. But "minus 280 F / 173 C" is terrible formatting, it looks like it's positive in Celsius... Considering the conversion between the 2 temperature scales can flip the sign (e.g. -10C is 14F), "-280F/-173C" would've been a lot clearer.
Ok, I've put minus signs up there.
Re: Athena landed in a dark crater where the temperature was -280° F / -173° C
#215Space is one of those rare fields where partial success actually counts as genuine progress.
Exactly. I look forward to humanity genuinely progressing towards successfully landing stuff on the moon. One day, we may even be able to land humans there! Intuitive systems is really pushing the envelope here, and I think that's worthy of admiration.
Re: Athena landed in a dark crater where the temperature was -280° F / -173° C
#216Earlier quoted context omitted.
So three ones, two different models, one in a different location. These are like... basics, no?
If you multiply every critical component by 3x there will be no room left for anything else.
Well the way they did it (twice) means they had space for other stuff, and of course also failed because they didn't have enough redudancy
Re: Athena landed in a dark crater where the temperature was -280° F / -173° C
#217the altimeter? Surely you would put three on there?
If I’m not mistaken there are three on commercial aircraft.. Seems like the bare minimum for a lunar lander .. I can’t imagine they’re THAT heavy
Re: Athena landed in a dark crater where the temperature was -280° F / -173° C
#218Re: Athena landed in a dark crater where the temperature was -280° F / -173° C
#219Earlier quoted context omitted.
So three ones, two different models, one in a different location. These are like... basics, no?
If you multiply every critical component by 3x there will be no room left for anything else.
2n + 1 is a basic minimum amount of redundancy for anything critical in a high-value space mission.
Re: Athena landed in a dark crater where the temperature was -280° F / -173° C
#220Is there any reason why we couldn't have some rudimentary GPS-like satellites around the moon? That could help out these kinds of landers, no?