- 1 6 4 9 c ▁takes ▁only ▁ 1 9 . 5 ▁Earth ▁days ▁to ▁orbit ▁its ▁host ▁star ▁Ke pler - 1 6 4 9 , ▁an ▁M - Type ▁red ▁d war f . ▁It ▁or bits ▁within ▁the ▁habit able ▁zone ▁of ▁its ▁star ▁system . ▁ ▁Cl imate ▁Very ▁little ▁is ▁known ▁of ▁Ke pler - 1 6 4 9 c ' s ▁climate . ▁It ▁receives ▁fully ▁ 7 5 % ▁of ▁the ▁light ▁from ▁its ▁host ▁star ▁that ▁Earth ▁receives ▁from ▁the ▁Sun ; ▁therefore , ▁depending ▁on ▁the ▁atmosphere , ▁its ▁surface ▁temperature ▁may ▁be ▁similar ▁enough ▁to ▁the ▁temperature ▁of ▁the ▁Earth ▁that ▁liquid ▁water ▁may ▁be ▁present . ▁It ▁is ▁unclear ▁what ▁the ▁composition ▁of ▁Ke pler - 1 6 4 9 c ' s ▁atmosphere ▁is . ▁ ▁Host ▁star ▁ ▁Ke pler - 1 6 4 9 ▁is ▁a ▁type - M ▁red ▁d war f ▁star ▁estimated ▁to ▁be ▁roughly ▁ ¼ ▁the ▁radius ▁of ▁our ▁Sun . ▁with ▁only ▁two ▁confirmed ▁plan ets ▁in ▁its ▁orbit , ▁the ▁other ▁being ▁Ke pler - 1 6 4 9 b . ▁Ke pler - 1 6 4 9 b ▁is ▁similar ▁to ▁Ven us ▁from ▁our ▁own ▁solar ▁system ▁in ▁two ▁ways . ▁First , ▁Ke pler - 1 6 4 9 b ▁and ▁Ven us ▁both ▁have ▁or bits ▁roughly ▁half ▁the ▁radius ▁of ▁the ▁next ▁known ▁plan ets ▁( Ke pler - 1 6 4 9 c ▁and ▁Earth