Word: spacecrafts
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...Mills says that Navy has been engaged in research trials following from BlackLight's work on surface coatings, which could be used to protect ships from rust, and that NASA has shown interest in his ideas about using hydrinos to power spacecraft...
...DOOMSDAY PREDICTION] The Heaven's Gate cult claims the earth will be destroyed, and they must flee on a spacecraft trailing Comet Hale-Bopp...
...traveling around our own solar system is about the same as the difference between swimming across the Atlantic and swimming across the Potomac. To get across the Atlantic you need to have a boat or an aircraft. To get to the nearest star you need to have a spacecraft that we have no hope of building within 100 years...
...scoot around the solar system and return within a few years, you need a spacecraft that will cruise at 100 miles a second. At that speed you will get to Mars in 10 days, to Pluto in 16 months. We can imagine a spacecraft carrying a big area of thin film to collect solar energy, with an ion-jet engine to produce thrust powerful enough to boost a spacecraft to a speed of 100 miles a second. It is also possible to build a nuclear-powered jet to do the same job, if the political objections to nuclear spacecraft...
...other hand, the nearest star is about 10,000 times as far away as Pluto. A trip to the stars within a human lifetime requires a spacecraft that cruises at more than 10,000 miles a second and accelerates to this speed within 10 years. The engine would have to deliver about a megawatt of power for every pound of weight of the ship. There is no way an engine that small and that powerful could keep itself cool. Even if the fuel is something exotic like antimatter, carrying far more energy than sunlight or uranium, the problem of cooling...