white dwarf造句
31) The sun's upper layers will expand and lose material, and eventually the core will cool enough to become a white dwarf star, and finally a black dwarf.
32) In a later stage of the sun's death throes, when it contracts into a compact white dwarf star, part of this rocky material could rain down into the white dwarf's hot atmosphere.
33) How such a dense planet formed is unclear, the researchers say, but it's probably the crystalline vestige of a white dwarf star whose atmosphere was stripped away by the parent pulsar.
34) His team used observations from NASA's Spitzer Space Telescope to investigate dead white dwarf stars.
35) This and the X-ray spectrum, which exhibits a high concentration of iron atoms relative to oxygen and silicon, convincingly show that the ejecta are the remains of an exploded white dwarf star.
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