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The year is 2400 and we have a steady alliance with another sapient species that is helping us on our dying planet. The problem? their planet is across the galaxy. How can we realistically (both economically and technologically) travel to their planet and back with their gifts? Their culture is the same as ours but their technology is 400 years more advanced. It's up to you to decide what technology is reasonable for that time. The solution will need to be able to carry a few tons of materials but doesn't need to carry personnel. We can assume that their planets gravity is equal to ours.

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closed as too broad by TrEs-2b, Aify, Frostfyre, bilbo_pingouin, Gary Walker Oct 17 '15 at 20:51

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • $\begingroup$ This is Idea Generate + Too Broad, and I'm 99% sure this is a duplicate of a better version of this question already on the site - I'm just too lazy to find it. $\endgroup$ – Aify Oct 17 '15 at 19:25
  • $\begingroup$ I know but I can't delete it $\endgroup$ – TrEs-2b Oct 17 '15 at 19:26
  • $\begingroup$ "I know but I can't delete it" - How about researching before posting your question next time? Search the site and google extensively before posting the question. Also, don't post questions that are this broad. Localize the questions. See How to Ask. This seems to be a recurring problem with most of your questions, btw. $\endgroup$ – Aify Oct 17 '15 at 19:27
  • $\begingroup$ I know, I working on making them more narrow $\endgroup$ – TrEs-2b Oct 17 '15 at 19:32
  • $\begingroup$ No, you're not. You're still posting questions before they're narrow enough to be posted. Narrow them down first, THEN post them. Use the Sandbox to help narrow down your questions before posting on main site. $\endgroup$ – Aify Oct 17 '15 at 19:34
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Use the same physical principles used in establishing and maintaining communication with the aliens. Since our Galaxy is 100k light years across, there is no way whatsoever we can communicate using contemporary physics. So just use whatever groundbreaking discoveries (most likely FTL and wormholes) happen in the following 400 or 800 years.

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