Starship Asterisk*

A visitor to the inner solar system every 70 years or so Comet 13P/Olbers ... Now on a return voyage to the distant Oort cloud ... A comet with a 70-year period isn't returning to the Oort cloud! (Wikipedia tells me that Olbers has an aphelion of 32 AU but the Oort cloud starts around 2000 AU out.)

But where DOES all that energy go? Re: the sticky bead thought experiment (now confirmed), if such an event put out "50 times" the peak energy of the observable universe, was "only" one-twentieth (or less) of said universe's width away from us, why weren't we all fried to oblivi...

I notice that the link address for "Réunion Island" is http://apod.nasa.gov/apod/astropix.html. This seems to me to be incorrect.