... 32a. Early Solar Warning . ... Artist's rendering of solar sail. One such method is the use of a solar sail , relying on the pressure of sunlight. ... When the sail faces the Sun squarely, the pressure of sunlight counteracts the Sun's pull and only enables the satellite to circle the Sun in a slightly larger orbit. ... The starship is propelled by a huge solar sail, pushed by tight beams of light from lasers which are powered by sunlight and orbit the Sun. ... The solar sail home page . ...

Heavy elements such as the uranium used in generating nuclear power are extremely concentrated sources of energy. ... Space rockets require not just energy, but also mass , matter ejected backwards, of which nuclear fuel provides very little. The limiting factor in the operation of rockets is not a shortage of energy but the high temperature at which they operate. ... One possible loophole remains. ... Test model of "Orion," pro- . ... Next Stop: #32 Far-out Pathways to Space: Solar Sails . ...

... Voyager Spacecraft Introduction (This Page) . ... The twin Voyager spacecraft, over the course of a dozen years, drew back the curtain on nearly half of the solar system . From launch in 1977 through the spectacular parting shots in 1989 of Neptune at the outer reaches of the solar system, this pair of gangly, instrument-laden spacecraft explored four planets -- Jupiter , Saturn , Uranus and Neptune -- as well as tens of moons, and the rings and magnetic environments of those planetary systems. ...

Cosmic Research, Vol. 42, No. 5, 2004, pp. 435­488. Translated from Kosmicheskie Issledovaniya, Vol. 42, No. 5, 2004, pp. 453­508. Original Russian Text Copyright © 2004 by Veselovsky, Panasyuk, Avdyushin, Bazilevskaya, Belov, Bogachev, Bogod, Bogomolov, Bothmer, Boyarchuk, Vashenyuk, Vlasov, Gnezdilov, Gorgutsa, Grechnev, Denisov, Dmitriev, Dryer, Yermolaev, Eroshenko, Zherebtsov, Zhitnik, Zhukov, Zastenker, Zelenyi, Zeldovich, Ivanov-Kholodnyi, Ignat'ev, Ishkov, Kolomiytsev, Krasheninnikov, Kudela,