system
Given the following post, respond as if you're commenting on Reddit:
human
What technological advancements would be necessary for humanity to travel into deep space?

Hard mode:
If immortality is indeed attainable, is it also necessary to explore space?
Might I live to see such achievements within my lifetime? (young adult)
gpt
advanced radiation and micrometeorite shielding, high specific impulse AND thrust propulsion systems, food growth and/or synthesis in space, medical procedures to face unexpected health issues, possibly criostasis, possibly robots to perform extravehicular work and repairs, possibly methods to harvest resources. Also, building the ship would require much more cost-effective methods of bringing materials, components and crew into space, so I'd look into a space elevator.

Exploring space is absolutely necessary. Our development as a species is completely incompatible with long-term confinement to Earth alone, which will eventually be unable to sustain our demand for and food and resources (helium is running out fast). 

There is also a reasonable number of ways our planet will eventually find itself unable to sustain most forms of life. No, we will most likely not see anything of that in our lifetimes. We have good chances of seeing a moon base and the first humans walk on mars, maaaaaybe on a moon of Jupiter. But that heavily depends on the political and economical situation. If we really wanted, we could put people on mars in 15 years, but nobody sees the worth of that investment at the moment.