What makes Cassiopeia A a fascinating supernova remnant from the 17th century?

[Nugatory]

From the Washington Post's coverage of the IXPE orbiting telescope:

Cassiopeia A is the remnant of a supernova explosion that took place when a gigantic star collapsed in the 17th century. It's visible in the night sky about 11,000 light-years away

 

[Rive]

Mixing the time of observation with the actual time of event?

Come on, starting a rant for every illogical absurdity picked from the news would earn me a permanent ban within a day, I guess Don't take this so seriously

 

[jim mcnamara]

On a scale of 1 ... 10, that WP article gets a "minus 3" - since we clearly can use any number we want to rate it.

 

[nuuskur]

Washington Post answering machine: "You have 67 missed calls from the ether by Albert Einstein"

 

[DennisN]

Washington Post answering machine: "You have 67 missed calls from the ether by Albert Einstein"

Either there is an ether or there's not. It's ether-or.