Cheap Astronomy has another look at the plausibility of mining in space (possible) and time travel (less possible)

Cheap Astronomy has another look at the plausibility of mining in space (possible) and time travel (less possible)
Cheap Astronomy asks the big questions. Our very big home. Will we ever make contact with aliens in another star system?
Happy New Year! Today we have @CheapAstro investigates our expanding universe, as well as some dead planets.
Today we have Cheap Astronomy tries colonising the Solar System. If we did what would we do with the different planets?
Opportunity & risk. How will we find the first evidence of extra-terrestrial life? Are we safe from asteroid impacts now?
Economics in the final frontier. Is in situ resource utilization really worth the trouble? What exactly is the space economy?
Time travel & aliens. We’re all going to die. Could future science save us? Why there’s a universe of potentially habitable worlds, but no-one’s talking?