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单词 heliopause
释义
heliopause
(once / 2954828 pages)
n

In astronomy, the heliopause is the outside edge or boundary of the heliosphere, the part of our solar system that's influenced by the sun. In 2012, NASA's Voyager 1 space probe crossed the heliopause.
Astronomers have various theories about what happens beyond the heliopause, at such a far distance from the sun that solar wind doesn't affect anything. Inside the heliopause is the heliosphere, and everything outside of the heliopause is considered interstellar space. The word heliopause is rooted in the Greek word for "sun," helios, and the Latin pausa, "a halt, stop, or cessation."
WORD FAMILY
heliopause
USAGE EXAMPLES
That place, called the heliopause, is one definition of the outer boundary of the Empire of the Sun.
Carl Sagan, Cosmos(1980)
The point at which the wind finally slows down and bumps up against the interstellar medium outside the heliosphere is known as the heliopause.
Time(Jul 27, 2012)
That transition point is known as the heliopause—but it’s not a clean line like an earthly border.
Time(Dec 08, 2013)
n the boundary marking the edge of the sun's influence; the boundary (roughly 100 AU from the sun) between the interplanetary medium and the interstellar medium; where the solar wind from the sun and the radiation from other stars meet
Hyper
bound, boundary, bounds
the line or plane indicating the limit or extent of something
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更新时间:2024/12/22 18:37:16