Related Clues:

• Danger point for space traveller axing ecological endeavour
• Critical stage of increasing gravity for spacemen
• Seek again to adopt measure that's a risk for astronauts
• Common to overlook gravitational force having to attempt this manoeuvre
• Return of a spacecraft to the earth's atmosphere
• Astronaut's homecoming
• Period of radio silence
• Space flight conclusion
• Astronauts' descent to Earth
• Space capsule transition
• Orbital decay result
• What a hand stamp permits at a concert
• What happens if you run out of space
• A spacecraft's coming down, never rising on test
• Never backward with experiment forming part of space shuttle mission