The new planetary system, the first in which both planets can be seen crossing in front of their star, may also contain an Earth-sized companion.
这个新发现的行星系统，第一两颗行星会在恒星前交叉经过，第二该系统都可能包含有地球大小的行星。
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'Most planetary scientists would not be surprised if the largest undiscovered companion was Neptune-sized or smaller, but a Jupiter-mass object would be a surprise, ' Matese told SPACE.com