天文学

• 再电离

  The reionization epoch proceeds a period from the formation of a large amount of the first stars at z～20 to z～6 when the universe was totally ionized.

  大约从红移z～20第一代恒星开始大量形成到z～6宇宙被完全电离这一段时期对应宇宙的再电离时期。