1) Pertaining to a class of objects with a mass less than 8 percent that of the Sun.
Fr.: limite sous-stellaire
The mass limit below which → hydrogen fusion cannot take place, and the cloud collapse cannot lead to the formation of a star. The limit is 0.075 → solar masses, corresponding to about 80 Jupiter masses.
→ substellar; → limit.
Fr.: objet sous-stellaire
An object with a mass too small to sustain the → proton-proton chain and thus become a true star. See → brown dwarf.
→ substellar; → object.
Fr.: point substellaire
The point on the Earth, or other body, at which a particular star is directly overhead at a given time.
→ substellar; → point.
Fr.: nature sous-stellaire
The fact or condition, for an object, of not being capable to sustain the → hydrogen fusion because of its low mass (less than 0.08 → solar masses).
→ substellar + → -ity.