111?

2018010408:34  ???
 
??111?

?y??????????????????J????K2-18b????

K2-18b?????????K2-18b???K2-18c????????

???K2-18?111??K2-18b??????????????????

???????????????????K2-18b???????????????K2-18c?????K2-18b????

??K2-18bNASA2019???????????????????????????

(??)
 

??

?!???????????????????????????????????

??? ???????????????????—??????

??

?

?

?

???

?