Astronomers scanning the skies/
Saw 7 rocks roughly earth’s size/
Go round a pink sun/
That’s called Trappist-1,/
A place to go if our sun dies.///
OK, I toyed with taking this one in a political direction, but played it straight in the end. But Steve Clarke (@alpha_ginge) has helpfully offered the alternative last line:
A haven from Mr. Trumps lies.
Which seems to work pretty well too.