HD 189733b is a hot Jupiter - a planet similar in mass to Jupiter in our Solar System, but one that orbits much closer to its star, and so is much hotter.
HD 189733b是一个炽热的木星——一颗和太阳系中的木星极为相似的行星，但是它绕行的轨道更接近与它的恒星，因此比木星更为炎热。
Since a 7 - solar - mass is too large to be a white dwarf or neutron star , it must be a black hole.
因为有着7个太阳质量的星体不可能是白矮星或中于星，所以它一定是黑洞。
Since a 7 - solar - mass is too large to be a white dwarf or neutron star , it must be a black hole.
因为有着7个太阳质量的星体不可能是白矮星或中于星，所以它一定是黑洞。
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