[SunkenCiv]

[Video Credit: NASA, CXC, GSFC, B. Williams et al.]

[Verginius Rufus]

Kepler’s fault!

[minnesota_bound]

I clicked on the link at the article “Finding progenitor remnants of Tycho’s supernova”
“Tycho’s star” was a supernova that appeared in 1752 CE

What is CE stand for. It should be BC or AD