天文学家宣布发现银河系外可能存在的行星的第一个证据

detect – v. to discover or notice something

glow – v. to produce a soft, warm light

optical –adj. relating to or using light, especially light that can be seen with the human eye

arena – n. a place of scene of activity, debate or conflict

confident – adj. sure about your ability to do things well

bold – adj. not afraid of taking risks