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» 牛郎織女距離多少光年?有人用幾何學算出來是14.81光年,我沒驗證。
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標題: 牛郎織女距離多少光年?有人用幾何學算出來是14.81光年,我沒驗證。
songpo
(簡明毅)
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積分 674
帖子 285
註冊 2007-1-14
用戶註冊天數 6311
用戶失蹤天數 628
發表於 2015-8-21 06:28
140.134.146.49
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牛郎織女距離多少光年?有人用幾何學算出來是14.81光年,我沒驗證。
https://ca.answers.yahoo.com/question/index?qid=20091116001038AAFEAbB
Are the stars Vega and Altair 16 light years away from EACH other?
Not quite. The distance between Vega and Altair is 14.81 light years.
Altair
r = 16.77 light years
α = 19h 50m 47.0s
δ = +8° 52' 6.0"
Vega
r = 25.3
α = 18h 36m 56.3s
δ = +38° 47' 01.3"
x₁ = r₁ cos α₁ cos δ₁
y₁ = r₁ sin α₁ cos δ₁
z₁ = r₁ sin δ₁
x₂ = r₂ cos α₂ cos δ₂
y₂ = r₂ sin α₂ cos δ₂
z₂ = r₂ sin δ₂
Δx = x₂ − x₁
Δy = y₂ − y₁
Δz = z₂ − z₁
d = sqrt[ (Δx)² + (Δy)² + (Δz)² ]
α = star's right ascension
δ = star's declination
r = star's distance from Earth
d = the distance between star #1 and star #2
Dump the liberals into Jupiter
· 6 years ago
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