Lying to the lower right of the main sequence on the Hertzsprung-Russell diagram, for 10 points, name this dimmest and least massive variety of star which lacks the core temperature to initiate thermonuclear reactions.
In 1999, the Chandra X-Ray observatory captured a flare from LP 944-20, one of these objects. Notable examples of this type of object include 2M1207, which has a planetary mass in orbit around it, and the smallest known one is found in the constellation Chamaeleon. These objects fall into spectral classes L and T and are hypothesized to also include the newly created spectral class Y. Often distinguished from objects of similar mass using the lithium test, the first one of them to be confirmed was Gliese 229B, while Richard Muller hypothesized that one of these named Nemesis orbits the sun and disrupts the Oort Cloud. Lying to the lower right of the main sequence on the Hertzsprung-Russell diagram, for 10 points, name this dimmest and least massive variety of star which lacks the core temperature to initiate thermonuclear reactions.
In 1999, the Chandra X-Ray observatory captured a flare from LP 944-20, one of these objects.
brown dwarfs