Exact(5)
"This is a reminder that spaceflight is an incredible challenge, but we learn from each success and each setback.
In a statement issued later on Thursday, US space agency Nasa expressed its confidence in SpaceX as a commercial partner and said the new explosion was "a reminder that spaceflight is an incredible challenge".
But for most of the engineers and astronauts involved in the space program, astronauts can never be rendered obsolete by robots, because human spaceflight is an end in itself.
Human spaceflight is an optional programme for Esa member states, and so far the UK has declined to invest in it.
It is possible that parasympathetic activity and its changes to stand and spaceflight is an indicator of a broader difference in autonomic status, both parasympathetic and sympathetic, between non-finishers and finishers.
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The recent explosion of an Antares rocket, and the tragic disintegration of Virgin's SpaceShipTwo three days later, remind us that spaceflight is a dangerous endeavour.
It's a reminder that spaceflight is a very difficult business, particularly as it occurs on the 50th anniversary of one of the most daring and successful space missions of all.
"Spaceflight" is a welcome relief after "Space". Finally, my questions will be answered.
Spaceflight is a unique environment with profound effects on biological systems including tissue redistribution and musculoskeletal stresses.
Clarke's energy and momentum was at its height, taking him to the depths of the Indian Ocean and to every forum in the world where missiles and spaceflight were an issue.
When I was a child, spaceflight was a thrilling reality.
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