Word: spacecrafts
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NASA delays the launch of the Cassini space probe, the plutonium-powered spacecraft that has been mired in controversy (TIME Daily...
...nothing more than a space-bound H-bomb? Despite the spaceship being laden with 72 pounds of highly toxic plutonium, the chances of a nuclear nightmare are actually quite remote. TIME science correspondent Jeffery Kluger reports that "Cassini's opponents have shown an extreme excess of caution. Dozens of spacecraft have flown with nuclear power sources, and so far, there have been no accidents...
Because both spacecraft travel at over 17,000 miles per hour, it takes them only 90 minutes to orbit the earth. As a result, Stefanik says there is a narrow window for stationary observers to spot the spacecraft...
According to Ron F. Dantowitz, an astronomy educator at the Boston Museum of Science, says the bright lights of the big city will not hide the spacecraft above...
Just getting to the Red Planet was a signal accomplishment for Surveyor. Launching a spacecraft from Earth to Mars, says NASA, is like firing a baseball from California to New York and hitting a particular window in the Empire State Building. Having managed this navigational tour de force, Surveyor then had to enter Mars orbit--a maneuver that carried its own risks...