this post was submitted on 23 Sep 2023
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India fails to re-establish communication with its Moon probe::undefined

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[–] [email protected] 53 points 1 year ago (1 children)

The Vikram lander and rover weren't designed to survive the lunar night so this was expected, but a loss nonetheless.

[–] [email protected] 17 points 1 year ago* (last edited 1 year ago)

Right? It was planned.

14 days in really cold and dark is really harsh for any electronics. Unless it had a radio isotopes generator, I can't imagine much of anything electronics surviving.

[–] [email protected] 29 points 1 year ago (1 children)

Im only half joking here but I bet the problem is because the probe is trying to send a signal to India, but modi already had them change everything to say Bharat so now the probe can't communicate with an unknown server or something

[–] [email protected] 3 points 1 year ago (1 children)

How did NASA handle the comms with Curiosity? Maan you've got to appreciate NASAs engineuity

[–] [email protected] 13 points 1 year ago* (last edited 1 year ago) (1 children)

Mars has an atmosphere and a more typical day length. It doesn't get that cold there.

The length of a day on the moon is 29.5 earth days, and there's no atmosphere.

The rover spent 14 days *in total darkness and cold

Electronics don't survive that. Weird shit happens when it gets that cold. Not to mention something simple like thermal expansion breaking a trace.

[–] [email protected] 11 points 1 year ago (1 children)

Er, no. Absolute zero is -273.15°C (-459.67°F) while the moon at its coldest is about -173.15°C (-297.67°F) so you’re about 100°C off.

[–] [email protected] 6 points 1 year ago (1 children)

Whoops. You're right..F and C confusion.

[–] [email protected] 5 points 1 year ago (2 children)

Ha, I do it all the time as a Canadian living in the States.

[–] [email protected] 2 points 1 year ago

As someone who grew up in Canada during the transition to metric, I think I might go into an infinite loop if I moved to the US. Ok the temp is 72 f which is 22 C which is 72 f which is...

[–] [email protected] 1 points 1 year ago

Yeah. I'm used to all the scientific stuff being metric, and only conventional for stuff that doesn't matter. I saw -270 when I looked it up and thought "that's about 3 K, I guess that's feasible".

I do think unit fights are stupid, though. Units are about communicating and understanding.

I learned that DC fast chargers are around 250 kW. I can tell you how fast that could boil a cubic meter of water or all kinds of science things, but that's not meaningful to me.

I can then tell you that that's enough to trip the big breaker on five houses. That's a bit more meaningful to me, but how much is a house.

Now, how many ovens set to max is that? I know how hot an oven is. It's more than 80 ovens. That's a much better unit, but I still can't really understand 80 ovens.