How long does it take to get to Mars - and why is it so difficult?
Summer 2020 is a popular time for missions to Mars because of the way the planets align - but how long does it take to get there?
from BBC News - World https://ift.tt/2ZQUPIP
from BBC News - World https://ift.tt/2ZQUPIP
How long does it take to get to Mars - and why is it so difficult?
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