艾米

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艾米與一些天體的比較

艾米Exametre,符號Em)是一个长度单位。1 Em=1018

可以用艾米计量的距离[编辑]

參考資料[编辑]

  1. ^ distance × sin( diameter_angle ), using distance of 5kpc (15.8 ± 1.1 kly) and angle 36.3', = 172 ± 12.5 ly.
  2. ^ van de Ven, G.; van den Bosch, R. C. E.; Verolme, E. K.; de Zeeuw, P. T. The dynamical distance and intrinsic structure of the globular cluster ω Centauri. Astronomy and Astrophysics. January II 2006, 445 (2): 513–543. Bibcode:2006A&A...445..513V. doi:10.1051/0004-6361:20053061. best-fit dynamical distance D=4.8±0.3 kpc ... consistent with the canonical value 5.0±0.2 kpc obtained by photometric methods 
  3. ^ Harper, Graham M.; Brown, Alexander; Guinan, Edward F. A New VLA-Hipparcos Distance to Betelgeuse and its Implications (PDF). The Astronomical Journal. April 2008, 135 (4): 1430–40. Bibcode:2008AJ....135.1430H. doi:10.1088/0004-6256/135/4/1430.