.木星.自身有發出熱幅射.但聚集的氫氣溫度壓力不足以點燃核融合之火.若點燃.本星系為雙星,但是木星燃料不足,很快會燃盡熄火,或許要燒又不燒的,慢火熬得比太陽更久也有可能.
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.以下,天文觀測到的 red-dwarf~brown-dwarf 星系,距太陽系約39.4光年,編號TRAPPIST-1, also designated 2MASS J23062928-0502285,有多行星軌道圍繞,星系之可居住區有行星環繞.可能有外星生命繁衍
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(TRAPPIST-1 is an ultra-cool dwarf star of spectral class M8.0±0.5 that is approximately 8% the mass of and 11% the radius of the Sun...)