In about 5 billion years, when the Sun enters the helium burning phase, it will expand to a maximum radius of roughly 1 AU , 250 times its present size, and lose 30% of its current mass.
Astro-physicists think that in about 5 billion years, the Sun will be a red giant.
Astro-physicists think that in about 5 billion years, the Sun will be a red giant.
文をもっと簡単にしてください: In about 5 billion years, when the Sun enters the helium burning phase, it will expand to a maximum radius of roughly 1 AU , 250 times its present size, and lose 30% of its current mass. 出力: