成大物理系 天文實驗室
天文辭彙檢索
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 行星和衛星
- faculae 光斑，耀斑
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- Bright areas of the solar surface associated with
sunspots and prominences.
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- fall 落隕石
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- A meteorite seen to fall. (See find.)
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- false color 假色
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- A representation of graphical data in which the
colors are altered or added to reveal details.
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- field (gravitational, electric, magnetic) 場
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- A way of explaining action at a distance. A
particle produces a field of influence to which
another particle in the field responds.
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- filar micrometer 動絲測微器
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- An instrument that permits precise measurements
at the telescope of the position of visual binary
stars and similar objects.
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- filtergram (filter) 濾鏡
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- A photograph (usually of the sun) taken in the
light of a specific region of the spectrum --
e.g., an H-alpha filtergram
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- find 尋隕石
- A meteorite that is found but not seen to fall.
(See fall.)
- fission hypothesis 分裂假說
- The theory that the moon formed by breaking away
from the earth.
- flare 閃焰耀斑
- A violent eruption on the sun's surface.
- flash spectrum 閃光譜
- The emission spectrum of the chromosphere that is
visible for the few seconds during a total solar
eclipse when the moon has covered the photosphere
but has not yet covered the chromosphere.
- flatness problem 平坦問題
- In cosmology the circumstance that the early
universe must have contained almost exactly the
right amount of matter to close space-time (to
make space-time flat).
- flat universe 平坦宇宙
- A model of the universe in which space-time is
not curved.
- flocculent 叢毛狀的
- Woolly, fluffy; used to refer to certain galaxies
that have a woolly appearance.
- focal length 焦距
- The distance from a lens to the point where it
focuses parallel rays of light.
- focus (of an ellipse) 焦點
- One of two points inside an ellipse that satisfy
the condition that the distance from one focus to
any point on the ellipse to the other focus is
constant.
- forward scattering 往前散射
- The optical property of finely divided particles
to preferentially direct light in the original
direction of the light's travel.
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- frequency 頻率
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- The number of times a given event occurs in a
given time; for a wave, the number of cycles that
pass the observer in 1 second.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 行星和衛星