Recent comments in /f/space

Diesalotwpg t1_jd6cdgc wrote

Even if we were to somehow detect a thousand more possible targets within that radius, I'm afraid we make no appreciable dent in the odds of finding an object on a viable trajectory. You are looking at a sphere with a surface area of 3142 square light years. So let's say the diameter of these targets is about 120 AU (a rough number for the radius of our heliosphere). That gives us an area of 0.000000215 square light years. That's a pretty tiny bullseye.

Although your comment about gravity assist implies that you are no longer interested in using the existing speed of the asteroid as you would need to manoeuvre it to slingshot around a gravity well, likely spending orders of magnitude more energy to do so than you have 'saved' by using an already moving object. At that point it would be be cheaper and easier to just build your space craft.

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EntropicallyGrave t1_jd6bxpc wrote

I was downvoted a bit, but the top answers are acting like atoms just "end" at some point; I mean, the answer they give, I'm guessing, would be just about right - but my point is that it is a sort of a "functional" definition... they are, in some sense, processes - atoms. Or events.

u/DudeWithAnAxeToGrind is saying good things; it's about when you decide it no longer looks like a "quark-gluon plasma" to you, and when it looks more like atoms. we don't even understand how water works, if you start looking at it close, like that

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MammothTankDriver t1_jd6bgmc wrote

Good thought. Many scientists have already thought about it. Its called terraforming.

Mars has many problems thst need to be solved for humans to live there.

  1. Atmosphere. Somehow, you need oxygen, and filler gas nitrogen and some carbon there. You can get these vis comets in theory but we dont even have a way to control comets or steer them into mars.

  2. Soil. Mars has no soil. The ground in mars is self sterilizing. Its toxic to bacteria and plants. We would need to remove or change the surface. Also bring soil from earth. The dust is also sharp. You dont want to breathe in that or you are dead.

  3. Magnetosphere. No protection from cosmic rays. In theory a thick atmosphere would protect people. But scientists are not 100% sure about this one.

  4. Gravity. Gravity on mars is pretty bad. It might not be possible for humans to live with such low gravity.

5.Time. Terrsforming mars could take thousands if not millions of years. Its not worth it imho.

In my opinion, it would be smarter to use geo engineering or space mirrors to decrease sunlight hitting earth. This could solve our problem with the sun for billions of years and extend earths life until the red giant phase of the sun.

In the red gisnt phase, in theory, we could extend the orbit of earth away from the sun toeards jupiter.

But after that, just a bit of shade would solve the red gisnt phase of the sun aswell.

But we wouldnt have a way to prevent the death of the sun. But in theory, removing helium from the sun could extend its life.

But who knows. I enjoy discussions about space.

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bensimwiththeshot t1_jd6ak81 wrote

Yooo lmao thank you for calling this guy out. I keep scrolling and he just keeps going on and on no matter how many reasons ppl tell him his little fantasy makes absolutely no freakin sense. “You have land for farming on the inside of the asteroid”. like whattt 🤦🏻‍♂️🤣🤣🤣

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bensimwiththeshot t1_jd6a5qy wrote

Dude you just don’t give up. I have already read at least 5 really well explained reasons why this little fairytale of yours simply will not work or serves no beneficial purpose. You just keep going man like a little kid that just keeps on saying “but, but, but, what if this what if what if that”. Here’s something to remember whenever you think you have come up with the ultimate idea. There are many, many people much more intelligent than those of us writing comments on reddit. So intelligent, that anything you may think you have all figured out I can almost guarantee you has been thought of and proved as a no no. Give it a rest my friend. Cool idea but it just doesn’t make any fucking sense for us earthlings to do.

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Whoelselikeants t1_jd67nqc wrote

It’s still wild how there’s only one “superpower”. Japan should be considered one because it has massive cultural influence, a pretty strong military, insane technological standings, it’s allied with basically all of nato, and more. Still waiting on Zambia to catch up in space.

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