【Python 天文】宇宙学参数以及距离换算
>>>fromastropy.cosmologyimportWMAP9ascosmo
>>>cosmo.H(0)
<Quantity 69.32 km / (Mpc s)>
>>>
>>>cosmo.kpc_proper_per_arcmin(3)
<Quantity 472.97709620405266 kpc / arcmin>
cosmo.luminosity_distance(0.23).value-----Mpc
A.value得到不带单位的数字
TBD
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