SI
SI
discoversearch

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor.  We ask that you disable ad blocking while on Silicon Investor in the best interests of our community.  If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.
Pastimes : NNBM - SI Branch
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  
To: lurqer who wrote (25747)4/23/2003 4:40:04 PM
From: thames_sider  Read Replies (1) of 104188
 
Thing is, wouldn't we be able to tell rather easily if there'd been any such supernova? If recent, the huge nebula would be a giveaway: OK, a dino-era one would have vanished, but we'd still have an uncomfortably close black hole.
I don't know how closely we know our nearest 100-ly, but could we have found supernovae remnants if they were that close? Or would anything like this have chilled by now so there was no radiation source left?
Report TOU ViolationShare This Post
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  

HomeMailHotSubjectMarksPeopleMarksKeepersSettings
Terms Of UseContact UsCopyright/IP PolicyPrivacy PolicyAbout UsFAQAdvertise on SI
© 2026 Knight Sac Media.  Data provided by Twelve Data, Alpha Vantage, and CityFALCON News