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词条 Space densities of stars
释义
Space densities of stars
Table
Space densities of stars
object density (solar mass per cubic light-year)
O, B stars 0.00003
A, F stars 0.0001
dG, dK stars 0.0004
dM stars 0.0008
gG, gK stars 0.00003
gM stars 0.0000003
dark companions 0.00014
white dwarfs (white dwarf star) 0.0002
long-period variables 0.00000003
RR Lyrae stars (RR Lyrae star) 0.0000000003
Cepheids (Cepheid variable) 0.00000003
planetary nebulae (planetary nebula) 0.00000000015
open clusters 0.0000011
globular clusters (globular cluster) 0.00000003
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