宇宙の距離と年齢 - 編集

宇宙の距離と年齢

* 宇宙
- 宇宙年齢: 13.799±0.021 Gyr (Lambda-CDM model, 2015)
Age of the universe - Wikipedia https://en.wikipedia.org/wiki/Age_of_the_universe
宇宙の年齢 - Wikipedia https://ja.wikipedia.org/wiki/%E5%AE%87%E5%AE%99%E3%81%AE%E5%B9%B4%E9%BD%A2
Timeline of the formation of the Universe - Wikipedia https://en.wikipedia.org/wiki/Timeline_of_the_formation_of_the_Universe

- comoving distance and light travel time

* 局部銀河群
- 大マゼラン雲までの距離: 49.97±0.19(statistical)±1.11(systematic) kpc / 163,000 ly (2013)
[1303.2063] An eclipsing binary distance to the Large Magellanic Cloud accurate to 2 per cent https://arxiv.org/abs/1303.2063

* 銀河系
- 銀河中心までの距離: 8.178 ±0.013(stat) ±0.022(sys.) kpc (2019)
[1904.05721] A geometric distance measurement to the Galactic Center black hole with 0.3% uncertainty https://arxiv.org/abs/1904.05721
- 銀河中心までの距離: 7.9±0.3 kpc /26,000±1,000 ly (Gaia, 2017)
Distance & Speed Of Sun's Orbit Around Galactic Centre Measured - Universe Today http://www.universetoday.com/133414/distance-speed-suns-orbit-around-galactic-centre-measured/
- 銀河円盤の年齢: 8.8±1.7 Gyr (2005)
[astro-ph/0506458] The age of the Galactic thin disk from Th/Eu nucleocosmochronology III. Extended sample https://arxiv.org/abs/astro-ph/0506458

- ω星団の年齢: 11.52 Gyr (2010)
[1001.4289] Accreted versus In Situ Milky Way Globular Clusters https://arxiv.org/abs/1001.4289

* 換算
- 1 pc = 3.261 563 777 ly

円周率を小数点以下二桁まで入力してください: