Fastest Celestial Body

Yes, there would be evidence of a recent supernova (or an exploded planet). And, in fact, there is. Do a little reading about the "Local Bubble".

The local bubble is a result of a SN event nearby so they say. Is that the only evidence? Where and when did the SN event happen that generated the local bubble?

<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">Where and when did the SN event happen that generated the local bubble?<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">According to Wikipedia , "Most astronomers believe that the Local Bubble was formed between some hundreds of thousands to a few million years ago by nearby supernovae that pushed aside gas and dust in the local ISM leaving behind hot, low density material."

Acording to NASA's Astronomy Picture of the Day , "The supernova that created this nebula [Vela SNR] occurred about 1500 light years away and about 11,000 years ago." For the broader picture, see The Local Bubble and the Galactic Neighborhood .

Even closer is the Gum Nebula , nearly 40 degrees across.

Apparently, we're surrounded by relatively recent SNR's. I'm ready to pack my bags and ship out; this neighborhood has gone to dogs!

(Sorry for my slightly misleading original post; edited a few minutes later.)

The size and age of the bubble of the bubble can be used to estimate the speed of the stuff that is being pushed outward. That stuff is moving very fast if the modeling is right(or not). But, what else other than gas is rejected in a SN event? There must be more stuff from the star that went blastic and where is the remains of the star? It is near enough to be a good source of data.