brown dwarf
(archaic) presumptuous
(astronomy) A starlike object that contracts to about the volume of the planet Jupiter after its formation phase; its mass may range from several times that of Jupiter, such that it fuses deuterium, up to just below the threshold of sustained hydrogen fusion.
(transitive) To release from a coop.
One who makes a show of liking another person with profuse or excessive displays of camaraderie, such as vigorous hand clasping, back-slapping, hearty words of greeting, etc.
天文学者たちは近くの恒星を回る褐色矮星を発見し、亜恒星の形成モデルに疑問を投げかけた。
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