this post was submitted on 28 Jul 2024
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[–] LostXOR@fedia.io 2 points 1 month ago (3 children)

Interesting that they opted for the "massive gravity assist chain" route instead of just using a more powerful rocket capable of a direct transfer to Jupiter. Sure, it's cheaper, but we have to wait a whole 8 years for it to arrive instead of ~3.

[–] teft@lemmy.world 5 points 1 month ago (1 children)

It would be prohibitively heavy to get a probe on an earth-jovian direct trajectory using just propellant.

You’d have to launch 20 missions before JUICE just to get enough fuel into space to get juice to jupiter. And then you also need to think about how you’d perform an orbital insertion at that speed (hint: you can’t) so you’ll need double the rockets for braking fuel.

40 missions for one space probe is not worth it for any science endeavor.

[–] Gsus4@programming.dev 1 points 1 month ago* (last edited 1 month ago)

Oh, I never noticed that, I thought they just did a transfer orbit, but yea, in all Jupiter orbiter missions so far they did all of these convoluted gravity assists. I see both Juno and Galileo did it (about 5y travel time).

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