I hear you, but it's a classic generic tangent—in fact a classic generic flamewar tangent. HN commenters are asked to resist those - see https://news.ycombinator.com/newsguidelines.html - even though it borders on irresistible.
Edit: but I've put the Celsius number in the title now as well...hopefully that will reduce the swelling.
I noticed it didn't have the Celsius value at the beginning, and a while later I noticed it was there. But "minus 280 F / 173 C" is terrible formatting, it looks like it's positive in Celsius...
Considering the conversion between the 2 temperature scales can flip the sign (e.g. -10C is 14F), "-280F/-173C" would've been a lot clearer.
One conversion comment is on-topic, even though any replies to it are most likely to be off-topic.