心神不宁
发表于 2025-3-23 09:46:35
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ALERT
发表于 2025-3-23 17:04:18
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meretricious
发表于 2025-3-23 18:44:05
Scientific investigations along the way to 550 AUtitled “Preliminary Scientific Rationale for a Voyage to a Thousand Astronomical Units” was compiled by Maria Ines Etchegaray in JPL Publication 87–17 (May 15, 1987). This chapter, as well as the author’s proposal to ESA for the FOCAL space mission, follows that publication closely.
OGLE
发表于 2025-3-23 23:29:12
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忙碌
发表于 2025-3-24 03:42:29
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监禁
发表于 2025-3-24 09:21:48
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Cognizance
发表于 2025-3-24 10:56:31
Astrodynamics to exit the solar system at the highest speed an algebraic error present in Ehricke’s paper was corrected by [.]. Again we quote from the abstract: “An error in some previous considerations of gravity-assist interstellar propulsion is pointed out and corrected. The revised analysis is applied to powered and unpowered periapsis maneuvers.”
Lumbar-Stenosis
发表于 2025-3-24 15:45:18
GL-SETI (gravitational lensing SETI): Receiving far ETI signals focused by the gravity of other starg ETI signal could be detected on Earth even if it comes from a very far source in the Galaxy and even if it is detected with a small dish apparatus. It all depends on the mass of the intervening star, on the precision of the alignment, and of course on the power of the ETI emitted radio waves.
ABYSS
发表于 2025-3-24 19:39:20
So much gain at 550 AUhis field was published by [.], but his work was virtually forgotten until 1964, when [.] gave the mathematical theory of gravitational focusing by a galaxy located between the Earth and a very distant cosmological object, such as a quasar.
Acupressure
发表于 2025-3-25 01:05:33
Magnifying the nearby stellar systemse reality. Before launching unmanned probes straight towards each nearby star, however, the need will be felt to have a detailed “map” of each target star system to explore on the widest possible range of electromagnetic frequencies. Here is where the FOCAL space mission will show its full power.