Referring to something that is situated below a star or stars; used in a specific scientific context.

तारों के नीचे स्थित

English Usage: The substellate region of the galaxy was studied extensively by astronomers.

Hindi Usage: खगोलज्ञों ने गैलेक्सी के तारों के नीचे स्थित क्षेत्र का विस्तृत अध्ययन किया।