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A comment on Optimal Strategies for Exploring Nearby Stars. Parent comment
No, it is not. It is actually being seriously worked on by Nasa.
Also, they use the word "affordable". Now, in case if NASA this can mean practically anything, but there is chance it is not prohibitively expensive.
https://www.nasa.gov/directorates/spacetech/niac/2020_Phase_...
Another reason to be bullish on SpaceX starship. Being able to send mass to space on the cheap opens up many new astronomical exploration avenues.
No, it is not. It is actually being seriously worked on by Nasa.
Also, they use the word "affordable". Now, in case if NASA this can mean practically anything, but there is chance it is not prohibitively expensive.
https://www.nasa.gov/directorates/spacetech/niac/2020_Phase_...