By erik bergaust

Discusses house exploration via manned and unmanned flights and speculates approximately planetary colonization.

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Additional resources for Colonizing the Planets - The Factual Story of Manned Interplanetary Flight into the 21st Century

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Rather The Goddess of Beauty as a Globe Adventurers who set out for another world must can survive on that planet. They must know if is human body? Can his they They must know covered by oceans or land masses or both. mosphere poisonous? if the planet's crust or surface will support them and their spaceship. the planet know if Is the at- Is the gravity pull within safe limits for the the temperatures be tolerated by man and equipment? Thus, an intensive study of the planet by astrono- mers and astrophysicists, using instruments here on Earth, and search through the use of re- unmanned space probes have been em- ployed to find the answers to all the questions about the physical properties of Venus.

Controllers in Russia lost contact with the probe. In gust, 1962, another Russian probe broke into three parts Au- in the atmosphere above the Earth. S. space scientists succeeded in launching successfully the first American Venus probe, Mariner II. On December 14, 1962, the Mariner II, at some 36 million miles from Earth, climaxed its 1 80-million-mile, 109-day journey through interplanetary space between Earth and Venus and passed within 21,598 miles of the center of Venus. The Russians had more mishaps, but on February 17, 1966.

Finally, we have discovered quite recently that Venus rotates around its own axis in 248 days, compared with the Earth's 24 hours. Each day and each night on Venus lasts sixty Earth days. Determination of the rotation period of Venus has been one of It the so happens that most challenging problems for Even with the scientists most powerful telescopes it throughout the ages. has never been possible for planetary researchers to view the surface of Venus. has always been — and continues during brief periods has it to tell how be —covered by been possible holes in Venus' cloud cover, but enough to it to The planet clouds.

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