Scientists Discover a Brown Dwarf Identified 30 Years Ago Is Two Objects — VOA Learning English
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Astronomers have made a surprising discovery about the first brown dwarf ever identified. New observations suggest the object is actually two brown dwarfs orbiting each other.
The American space agency NASA describes a brown dwarf as an object that “straddles the dividing line between stars and planets.”
Brown dwarfs form like stars. This means they can grow dense and hot enough to collapse under their own gravity. But they never grow dense or hot enough to begin the process of nuclear fusion needed to turn into a star, NASA said. Because of this, brown dwarfs are sometimes called failed stars.
Many brown dwarfs are similar to gas giant planets and weigh just a few times more than the mass of…
Торкнись будь-якого слова — переклад з’явиться одразу, а слово ляже в твою добірку разом із реченням.