Interesting; if the paper finds general acceptance, it'll be fun to watch a new flurry of activity. The fairly recent controversial concept of "firewalls" has r

Interesting; if the paper finds general acceptance, it'll be fun to watch a new flurry of activity. The fairly recent controversial concept of "firewalls" has reinvigorated that subfield of physics. Whether black holes exist or not, there's something really dense at the center of our galaxy. It's a challenge to come up with a consistent non-black-hole explanation for the observed motion of stars at the galactic center. http://www.galacticcenter.astro.ucla.edu/images/2011orbits_animfull.gif http://www.galacticcenter.astro.ucla.edu/images/2011orbits_a... More here: http://www.galacticcenter.astro.ucla.edu/journey/smbh.html http://www.galacticcenter.astro.ucla.edu/journey/smbh.html