หมายหตุ ของ ที่ตั้งของโลกในเอกภพ

  1. 1 2 A parsec (pc) is the distance at which a star's parallax as viewed from Earth is equal to one second of arc, equal to roughly 206,000 AU or 3.0857×1013 km. One megaparsec (Mpc) is equivalent to one million parsecs.
  2. 1 2 Semi-major and semi-minor axes.
  3. ↑ 1 AU or astronomical unit is the distance between the Earth and the Sun, or 150 million km. Earth's orbital diameter is twice its orbital radius, or 2 AU.

แหล่งที่มา

WikiPedia: ที่ตั้งของโลกในเอกภพ http://astronomy.swin.edu.au/~gmackie/billions.htm... http://hypertextbook.com/facts/2002/StacyLeong.sht... http://www.nature.com/news/earth-s-new-address-sol... http://www.reuters.com/article/2014/09/03/us-space... http://www.sciam.com/article.cfm?id=misconceptions... http://www.sciencedaily.com/releases/2014/09/14090... http://www.skyandtelescope.com/astronomy-news/lani... http://www.space.com/18811-multiple-universes-5-th... http://www.universetoday.com/37360/structure-of-th... http://aa.springer.de/papers/0357001/2300268.pdf