Definition of substellar in English:

substellar

Line breaks: sub|stel¦lar
Pronunciation: /sʌbˈstɛlə
 
/

adjective

Astronomy
Relating to or denoting a body much smaller than a typical star whose mass is not great enough to support main sequence hydrogen burning: substellar objects known as brown dwarfs may make up this dark mass
More example sentences
  • Whereas some folks consider brown dwarfs the duds of the galaxy, astronomers see beauty in these substellar embers.
  • The mass fraction under the form of substellar objects in the halo of the Galaxy is likely to represent only 5 to 15% of the total dynamic mass.
  • We have completed the most extensive survey to date for low mass stellar and substellar companions to white dwarfs in the solar neighborhood.

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Word of the day hubris
Pronunciation: ˈhjuːbrɪs
noun
excessive pride or self-confidence