Sentences with phrase «successful return to the surface»
The historic balloon flight, which was inspired by the visionary Jules Verne's book Journey to the Centre of the Earth, lasted about 25 minutes, from its departure to the landing at the bottom of the Mamet cave and successful return to the surface.
http://www.breakingtravelnews.com/ Not exact matches
Best of all, human missions are virtually guaranteed to last much longer than current rover missions: while the minimum duration for the Mars rovers to be considered a success was 90 days, a successful human mission — i.e. one which returned the astronauts to earth — would take 910 days (roughly 2.5 years), with 550 of those days (about 1.5 years) spent on the surface of Mars.