1-in plain sight 显而易见，一目了然

The closet black hole to Earth's solar system has been discovered by a team of astronomers who say it was hiding in plain sight only about 1,011 light-years.

2-unaided eyes 裸眼

We were totally surprised when we realized that this is the first stellar system with a black hole that can be seen with the unaided eye.

3-stumble upon 偶然发现

4-out-of-this-world 出色的，了不起的

Scientists stumbled upon the out-of-this-world discovery in the Telescopium constellation while tracking two stars orbiting each other just outside the gravitational pull of the black hole.

5-get a handle on 着手处理

You could get a much better handle on the black hole's mass, if it all works out.

6-be buzzing about 热烈讨论

Other srargazers were buzzing about the major discovery that could give astronomers their best chance at unlocking the mysteries of the galactic phenomenon.