Translation: When he dies, turn him into stars and form a constellation in his image. His face will make the heavens so beautiful that the world will fall in love with the night and not want daylight to come.
Actually, I have trouble understanding even simple poetic writing, like Shakespeare, and I'm a native English speaker with a graduate degree. I'm sure there are more like me, especially among engineers!
And, when he shall die,
Take him and cut him out in little stars,
And he will make the face of heaven so fine
That all the world will be in love with night,
And pay no worship to the garish sun.
[1] https://www2.jpl.nasa.gov/sl9/news82.html
RIP all you pioneer astronomers!