Post AkPL4EgfINfXRvi9U8 by tsturm@famichiki.jp
(DIR) More posts by tsturm@famichiki.jp
(DIR) Post #AkOu077qlmI44qEjvk by nyrath@spacey.space
2024-07-28T20:39:58Z
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Hard science fiction writers are annoyed that travel times in the solar system using realistic rocket propulsion are measured in years.Hollister David points out that more exciting transit times can be found within the moon systems of Jupiter and Saturn. They are practically miniature solar systems. http://hopsblog-hop.blogspot.com/2013/01/mini-solar-systems.html?m=1
(DIR) Post #AkOvLYgnaEx5bFNC64 by isaackuo@spacey.space
2024-07-28T20:55:03Z
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@nyrath Bear in mind that the delta-v requirements for getting around the Jupiter or Saturn systems can be pretty annoying - the large moons don't give much Oberth Effect bonus, but still have enough gravity to make launching and landing a pain. And with the exception of Titan, no option to aerobrake or aerocapture.Limited solar power makes solar electric more sluggish, of course.
(DIR) Post #AkPL4EgfINfXRvi9U8 by tsturm@famichiki.jp
2024-07-29T00:46:06Z
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@isaackuo @nyrath Learned that the hard way playing Kerbal. The Jupiter-equivalent there has challenging delta-v requirements all over the place.
(DIR) Post #AkR2mm2N9UVmoOJAe0 by DenOfEarth@mas.to
2024-07-29T19:47:19Z
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@isaackuo @nyrath Could you not aerobrake around the gas giant itself?
(DIR) Post #AkR2mnSzpzP1FFlwmW by isaackuo@spacey.space
2024-07-29T19:51:12Z
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@DenOfEarth @nyrath Aerobraking around the gas giant doesn't help getting from one moon to another, except in the interesting case of going from a small outer irregular moon to one of the innermost moons.
(DIR) Post #AkR2mo87N6IPIn0msS by DenOfEarth@mas.to
2024-07-29T21:02:56Z
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@isaackuo @nyrath I think I was remembering the aerobraking scene from 2010 Odyssey Two as they arrive at Jupiter aboard the Alexei Leonov to meet with and board the Discovery One.
(DIR) Post #AkR7CL7SFrVSfm8DqK by klausman@mas.to
2024-07-29T21:34:35Z
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@DenOfEarth @isaackuo @nyrath I've always wondered what the U-shaped thing at the "bottom" of the Leonov was. Anybody know?
(DIR) Post #AkR7PrtdhXyU5t7XI8 by nyrath@spacey.space
2024-07-29T22:19:43Z
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@klausman @DenOfEarth @isaackuo I have no idea.In the movie, that's what it uses to ride piggy back on the Discovery. But I don't know what it's designed function is.
(DIR) Post #AkR83XXinK8CYHmlf6 by nyrath@spacey.space
2024-07-29T22:26:52Z
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@klausman @DenOfEarth @isaackuo This says "universal docking ring". I have no idea how canon this is.https://www.pinterest.com/pin/491173903095585322/
(DIR) Post #AkRO1WRFWoHXoXomcC by isaackuo@spacey.space
2024-07-30T01:16:43Z
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@DenOfEarth @nyrath Aerobraking and aerocapture are definitely useful for arriving from an interplanetary trajectory and lowering apoapsis to the desired destination. But getting from one inner moon to another inner moon it's not useful.
(DIR) Post #AkRdKjLPGeqIeghbZg by floatybirb@mastodon.social
2024-07-30T04:17:19Z
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@nyrath a downside is most of the destinations are gonna be "icy moons that are kind of similar to each other", unless you develop each of those icy moons in a different direction to make it into a more memorable destination.
(DIR) Post #AkSKlpXMeAFRi4Spjk by n1vux@mastodon.radio
2024-07-30T01:50:03Z
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@isaackuoIIRC Nyrath himself @nyrath has colledted an appendix of tables, charts, ^maps^ on deltaV betwixt planets and moons. https://projectrho.com/public_html/rocket/appmissiontable.php
(DIR) Post #AkSLPWXogFtQO8bRc8 by nyrath@spacey.space
2024-07-30T12:31:13Z
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@floatybirb True.There are a couple non-icy moons to jazz things up. Like Io the volcano moon and Titan where it rains natural gas.
(DIR) Post #AkSM9OBU5zstmS1leS by nyrath@spacey.space
2024-07-30T12:39:31Z
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@n1vux @isaackuo I collected the tables and such because calculating delta V costs for transits between planets and moons is a daunting task for the mathematically inept.
(DIR) Post #AkSMZjjeakW69JZc80 by DenOfEarth@mas.to
2024-07-30T12:44:16Z
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@nyrath @floatybirb Didn't Kim Stanley Robinson create such a universe? First revealed in The Memory of Whiteness where a gifted blind musician from Pluto undertakes an epic Solar System concert tour, then later expanded in other novels.
(DIR) Post #AkSSYBSn80DDIAKSbQ by michael_w_busch@mastodon.online
2024-07-30T13:32:44Z
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@floatybirb @nyrath Europa, Ganymede, and Callisto are not that similar to one another.Thanks to the tides and the Io plasma torus; there is a tradeoff between "how far down is the ocean?" and "how much radiation is there?" .Europa having the thinnest ice shell, but also being irradiated so heavily that it glows in the dark.
(DIR) Post #AkSSewCIHkyhyKphYm by isaackuo@spacey.space
2024-07-30T13:10:29Z
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@floatybirb @nyrath Well, I've looked at various moons looking for good resources to utilize, and the more you look at them the more different they look!For example, Iapetus is the ONLY moon out there which combines a near pure ice _surface_ with a slow rotation rate (suitable for ice prism solar concentrators).And even just the orbital positions and gravity levels have a huge impact on utility.Terrain is also extremely different - compare Hyperion with Mimas.
(DIR) Post #AkSUyeq4jUxvptyHaK by nyrath@spacey.space
2024-07-30T14:18:25Z
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@isaackuo @floatybirb Well, on Earth, writers generally are more interested in the governments and national culture of the inhabitants than they are the geography and climate.