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单词 anthelion radiant
释义
anthelion radiant

Astronomy
  • A broad, weak source of meteors (usually fewer than five per hour) located on the ecliptic some 15° east of the anthelion point. Meteors from this radiant are caused by particles of interplanetary dust moving faster than the Earth which enter the atmosphere as they overtake us. Activity from the anthelion radiant was formerly attributed to a sequence of individual minor showers, but is now recognized to be part of a general background that is active throughout the year and that has no specific parent body. The only exceptions are the Alpha Capricornids, the southern Delta Aquariids, and the Taurids, all of which have identified parent bodies.


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