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Carthag Tuek posted:isnt that just a matter of needing stuff to happen in finite time? imo just park in a decaying orbit and let the actual impact happen when it happens The Parker Solar Probe is the fastest object ever built relative to earth. It's intentionally getting as close to the sun as it can with multiple gravity assists from Venus over years. And it's deemed unlikely to hit the sun before it hits something else. It's a 1500 lb can of instruments sent up on one of the largest rocket platforms available. You're not gonna hit the sun with trash outside of bragging rights.
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Jan 12, 2024 20:29
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zedprime posted:Getting it to an orbit that is influenced by the suns atmosphere enough is most of the way there, and if you are still ok waiting time it's going to linger in the middle of nowhere long enough it's going to smack into Earth or Venus without avoidance burns. :| what if just get up real high and drop it
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Jan 12, 2024 20:53
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Yeah, the chart doesn't optimize for time at all. It's very much more like an absolute minimum energy expenditure to get there at all, ignoring exceptional gravity assist trickery. For which you'd be using the game's time warp functionality to get things to line up anyway. It reflects reality well enough in that there's no shortcut. You want an orbit that intersects with enough of the sun, you're going to spend the bulk of that delta v one way or another. The real infinite time hack is waiting for the sun to expand around it, probably.
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Jan 12, 2024 20:54
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Carthag Tuek posted::| Flipperwaldt posted:The real infinite time hack is waiting for the sun to expand around it, probably.
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Jan 12, 2024 20:59
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That's the most poetically self-loathing thing I've read all week
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Jan 12, 2024 21:02
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We are all star dust Doomed to be star trash
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Jan 12, 2024 21:13
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earth is going around the sun at 100,000 km/h so that's your initial velocity. all you need to do is point in the opposite direction and accelerate at 3g for 17 minutes, and then your velocity relative to the sun is 0, and you'll fall in. this doesn't seem particularly hard to me. bing bang boom
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Jan 12, 2024 21:51
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I would just point at the sun and not stop thrusting how hard could it be
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Jan 12, 2024 21:56
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Sagebrush posted:earth is going around the sun at 100,000 km/h so that's your initial velocity. all you need to do is point in the opposite direction and accelerate at 3g for 17 minutes, and then your velocity relative to the sun is 0, and you'll fall in. this doesn't seem particularly hard to me. bing bang boom It’s this. “Landing” on the Sun, i.e. reaching it surface with negligible velocity, would be expensive. Falling into the Sun at high speed is not particularly expensive. You’d need Δv of about thirty kilometres per second to do it directly from Earth orbit. You could do it for less by kicking to a large elliptical orbit and nulling orbital velocity at aphelion, the orbit’s point furthest from the Sun.
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Jan 12, 2024 22:12
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DarkHorse posted:I would just point at the sun and not stop thrusting how hard could it be Its not that easy, you have to thrust at where the sun was 8 minutes ago.
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Jan 12, 2024 22:18
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Story of my dating life 
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Jan 12, 2024 22:20
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SiKboy posted:Its not that easy, you have to thrust at where the sun was 8 minutes ago. So you just aim 48 degrees counterclockwise? Easy.
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Jan 12, 2024 22:22
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Platystemon posted:You’d need Δv of about thirty kilometres per second to do it directly from Earth orbit. You could do it for less by kicking to a large elliptical orbit and nulling orbital velocity at aphelion, the orbit’s point furthest from the Sun. If you cancelled 30kps of earth's orbital velocity you'd still be faster than mercury's orbital velocity. You have to have more go juice than 30kps if you want to hit the sun. Baring of course gravity assists from other bodies.
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Jan 12, 2024 22:43
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Huh? Why would Mercury's orbital velocity enter into it? Our goal here is launching from Earth and falling into the sun. All you have to do is cancel out Earth's orbital velocity and then gravity pulls you straight in. Mercury orbits faster than earth, yes, but we're not moving from one orbit to another, we're just stopping in space and falling into the sun. Either you're confused or I am.
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Jan 12, 2024 22:50
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Sagebrush posted:Huh? Why would Mercury's orbital velocity enter into it? Because if you're moving from one orbit to another and you're still going faster than something else that is orbiting you're not going to magically somehow stop orbiting. I wasn't responding to your post, cause you are correct. If you fully cancelled earth's orbital velocity and just left the vessel sit there it'd eventually fall into the sun. The person I was responding to was claiming with 30kps deltaV you could do it.
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Jan 12, 2024 22:52
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IIRC 30 kps is about right between Oberth BS and where you would recognize the suns plasma being part of the sun. Remember you're elliptical going Mercury speeds too after your burn so the geometry will be different. For reference you can cya later shitlords for 16kps. There is a theoretical 9kps double transfer path to the sun from earth but you are likely to be eaten by a planet on the way because n body calculations are hard.
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Jan 12, 2024 22:53
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zedprime posted:There is a theoretical 9kps double transfer path to the sun from earth but you are likely to be eaten by a planet on the way because n body calculations are hard. Step 3: Concern quote:Oh Christ sometimes there are more than two dots.
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Jan 12, 2024 23:02
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Good luck doing anything, anything at all in space travel that isn't moving from one orbit to another.
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Jan 12, 2024 23:03
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CainFortea posted:If you cancelled 30kps of earth's orbital velocity you'd still be faster than mercury's orbital velocity. You have to have more go juice than 30kps if you want to hit the sun. Let’s do this from numbers I remember in case Wikipedia is lying right now. The Earth traverses a roughly circular orbit with radius of eight and one‐third light‐minutes in a period slightly more than three hundred and sixty‐five days. (8×60+20) × c × 2 × π ÷ (86400 × 365.25) ≈ 29 845 m∕s Thirty kilometres per second is right.
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Jan 12, 2024 23:26
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Wait Urghh So are we stuck on the surface of the earth because gravity pulls us there but also because... we're already travelling in that direction, along with the earth... and it's hard to change direction? Like if the earth disappeared would we keep going because aaa;d'sd'klasfas;djfd;kadsjff
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Jan 12, 2024 23:26
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Tree Bucket posted:Wait We would indeed keep going around the sun, in the same orbit as the Earth was, and also our cold, stiff corpses would slowly congregate somewhere around where the center of the planet was, since we'd attract each other. A sexy though, isn't it? An ice cold, massive heap of dead meat orbiting the Sun. What would happen to the Moon, though? Presumably it would immediately escape in the direction it was going, and eventually find some new interesting orbit around the Sun or some different planet?
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Jan 12, 2024 23:36
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Hippie Hedgehog posted:We would indeed keep going around the sun, in the same orbit as the Earth was, and also our cold, stiff corpses would slowly congregate somewhere around where the center of the planet was, since we'd attract each other. A sexy though, isn't it? An ice cold, massive heap of dead meat orbiting the Sun.
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Jan 12, 2024 23:49
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The Moon is basically doing a corkscrew twirl around the Sun right now, iirc if the Earth vanished the Moon would basically keep the same minimum and maximum distance from the Sun, but they'd be at the furthest points of its yearly orbit rather than it swinging back and forth monthly.
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Jan 13, 2024 08:57
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Ah, thanks for correcting my misguided notions about how gravity works.
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Jan 13, 2024 09:14
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Hippie Hedgehog posted:An ice cold, massive heap of dead meat orbiting the Sun. This could be a thread title for something.
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Jan 13, 2024 10:05
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The Moon’s orbital radius and speed around the Earth hardly register on the scale of Earth’s orbit around the Sun. If the Earth and its gravitational influence disappeared, the Moon would effectively just take over the Earth’s orbit.
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Jan 13, 2024 10:07
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Evangelion alternate ending: everyone in the world suffocates and gravitates to the moon, splattering its surface in frozen giblets. How many millimeters of corpse-sludge would then be covering the Moon’s surface?
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Jan 13, 2024 10:45
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Hippie Hedgehog posted:Evangelion alternate ending: everyone in the world suffocates and gravitates to the moon, splattering its surface in frozen giblets. Since the moon has no atmosphere, part of it would sublimate and disappear into space, making this calculation trickier than you think.
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Jan 13, 2024 10:49
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I don’t know what the population is supposed to be in Evangelion, but assuming that it’s the same as today, the answer is a film fourteenth thousandths of one millimetre deep. https://www.wolframalpha.com/input?i=volume+of+human+body+*+8+billion+%2F+%28surface+area+of+Moon%29
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Jan 13, 2024 10:50
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Byzantine posted:The Moon is basically doing a corkscrew twirl around the Sun right now, iirc if the Earth vanished the Moon would basically keep the same minimum and maximum distance from the Sun, but they'd be at the furthest points of its yearly orbit rather than it swinging back and forth monthly. I don't think this is true. Assuming perfectly circular orbits, if the earth vanished while the moon was at its furthest point from the sun and moving at its fastest relative to the sun... code:Then the moon would be in a new perihelion and have a new aphelion farther from the sun than it currently ever is. And if the earth vanished while the moon was between it and the sun, while the moon was moving at its slowest relative to the sun, that would be its new aphelion instead. That said, Platystemon's probably right and the actual difference would be negligible compared to the average ~150million km distance to the sun. dublish has a new favorite as of 16:19 on Jan 13, 2024 |
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Jan 13, 2024 16:16
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Platystemon posted:I don’t know what the population is supposed to be in Evangelion, but assuming that it’s the same as today, the answer is a film fourteenth thousandths of one millimetre deep. Yeah the total volume of humans on earth is really not that large. 
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Jan 13, 2024 20:10
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Sagebrush posted:Yeah the total volume of humans on earth is really not that large. If you look at the chart of evolution, you got like single cell organisms over here, then fish, then walking on land, then you know, walking upright, and if you were to look ahead three or four steps you would see something like this.
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Jan 13, 2024 23:20
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Sagebrush posted:Yeah the total volume of humans on earth is really not that large. It’s not, but we’re dunking on all wild mammals. 
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Jan 13, 2024 23:48
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Platystemon posted:It’s not, but we’re dunking on all wild mammals.  
Llamadeus has a new favorite as of 00:26 on Jan 14, 2024 |
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Jan 13, 2024 23:59
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Jan 14, 2024 13:08
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Emptyquoting a great chart
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Jan 14, 2024 14:03
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Chaotic Neutral seems like the most evil of them all??
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Jan 14, 2024 14:53
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Lol - when I first moved in with my gf/now wife, we had a neutral good situation. Guess which side was mine. To be fair, it was a queen bed in a pretty small room. That side shuffle to get up or go pee in the middle for the night was a pain.
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Jan 14, 2024 22:21
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this seems meaningless unless you know where the doors and windows are except CE, sure
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Jan 14, 2024 23:03
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Neutral Evils just climb into bed through a window every night? Or their partners, I guess.
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Jan 14, 2024 23:08
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