| 21. | Trouble was that this still did not match O'Keefe's vision of crossing interplanetary space in high-speed, nuclear-powered probes.
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| 22. | Flying ships travel through the vast expanses of interplanetary space, visiting moons and planets and other stellar objects.
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| 23. | He considered interstellar and interplanetary space travel instead of the confines of a single planet in the new game.
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| 24. | The escape velocity required to pull free of Earth's gravitational field altogether and move into interplanetary space is about.
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| 25. | These are wide zones of the Sun where the magnetic field is unipolar and opens towards the interplanetary space.
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| 26. | The mission also includes investigations of aspects of interplanetary space, such as gamma-ray bursts, solar wind and cosmic dust.
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| 27. | Japan is only the third nation after the United States and Russia to have attempted an interplanetary space mission.
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| 28. | Walter Shimmerling, a NASA radiation expert, said high energy particles from supernovae that exploded in our galaxy permeate interplanetary space.
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| 29. | Primitive bacteria could have hitched a ride on rock fragments crossing interplanetary space and seeded life on Earth, he says.
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| 30. | Interplanetary space is filled with traces of hydrogen gas, which cause the planets to slowly spiral inwards, along with ice blocks.
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