Recent comments in /f/space

ryschwith t1_jdy1uq4 wrote

In addition to it actually being very difficult to launch things toward Venus, which others have covered well, materially reducing the amount of garbage on Earth would require an untenable launch cadence--something on the order of launching a rocket every ten seconds.

And if we could manage that we would very quickly turn Earth into Venus with all of the greenhouse gases emitted by the launches.

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TheBroadHorizon t1_jdy1roe wrote

Still a ridiculous idea. It takes far less energy to just de-orbit debris and let it burn up in Earth's atmosphere.

You're basically saying that instead of throwing your trash into the bin by your house, you should put each piece on a plane and fly it to the Australian Outback to throw out.

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Postnificent OP t1_jdy1l2v wrote

No. I keep reading all these articles about these new nuclear pellet engines that are going to cut mars travel to like 5 days, fuel is very light etc… and thought this is a better first use for this technology. I’m sure that instead we will just discard the old ones in orbit and leave them. I have a thorough understanding how all this works and how much it costs. We want to explore but safety first, maybe we should clean up. Ignoring the problem is melting the ice caps right now.

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Anonymous-USA t1_jdy0pqy wrote

If you can reach Venus then you can just as easily reach the Sun 🙄.

Why don’t we use the Sun as a dumpster? 🤔 💰💰💰💰💰💰💰💰💰💰💰💰💰💰💰💰💰💰 💰💰💰💰💰💰💰💰💰💰💰💰💰💰💰💰💰💰 and not just the cost of the fuel and equipment but also the availability of the fuel and equipment. You’re trading one limited resource (the ground which actually isn’t so limited) with another.

This is a non-starter of an idea. Might as well dump it into an active volcano 🌋 😆

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Postnificent OP t1_jdy0n22 wrote

So we design a “ship” for the express purpose of pushing crap out of orbit. That’s it’s whole job. They are introducing the ideas of nuclear reactor propulsion etc to head straight to mars (yet another dumpster) when we should really clean up our backyard first. It would make things much safer.

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drdan82408a t1_jdy0666 wrote

I assume you’re talking about debris that is already in space…. Well, there are many, many problems with this idea.

  1. getting all the debris together, in one place, to put on a rocket would be massively difficult.

  2. it’s not a matter of just aiming it towards the sun and firing a rocket. I mean, you could do it that way, but it would be massively inefficient. You would have to burn retrograde compared to earth’s orbit to lower the perihelion of your probe, so there’s no “missing Venus and hitting the sun”, if you miss your target you’re just in interplanetary space for however many years until you hit who knows what, or most likely forever.

  3. getting all of this out of low earth orbit would be massively inefficient as well. It would be much, much easier to deorbit it safely into earth, aiming at oceans and/or unpopulated regions.

  4. we don’t want to contaminate Venus unnecessarily.

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WhosAlex992 t1_jdy01am wrote

You're logic here is based on both a lack of understanding of space travel, and seemingly a distrust of the classification of Venus as not harboring life (?) Space travel is immensely expensive, both in terms of monetary and conventional resources. Sending garbage to space, let alone another planet, would be an incredibly costly and wasteful endeavor. The reason we don't do so is as simple as that. I very much doubt that the public is being lied to about Venusian life.

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EarthSolar t1_jdxzs7l wrote

Good luck launching something up there to tow the junk all the way to Venus. The junk does not have its own propulsion system, and most definitely not enough to dish 4 km/s needed to leave Earth’s orbit and intercept Venus.

Why add prohibitive amount of fuel just to send the junk to some distant destination when you can just get functional satellites to, like, do controlled deorbit over uninhabited areas and let atmospheric entry destroy them.

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