A total event collapse was a time explosion which caused the
universe to collapse totally, hence the name. A total event
collapse could be caused by a TARDIS exploding, as happened when
the Doctor's TARDIS exploded. The Eleventh Doctor seemed to know
of total event collapses and that the only way to stop one was
to reboot the Universe. Some things could survive a total event
collapse if they were at the centre of the explosion before they
were also erased from existence, as happened with the Earth.
(TV: The Big Bang) The Doctor noted that every sun would
"supernova at every moment in history" and that "the whole
universe [would] never have existed". (TV: The Pandorica Opens)
Though Earth's sun went supernova, Earth itself, at the "eye of
the storm", survived longer as a meta-temporal event. From the
Doctor's viewpoint, the Earth, the moon and the exploding TARDIS
existed until 1996, when they too began to fade. Aside from the
Moon, the exploding TARDIS, Earth and its inhabitants, every
star, planet, life form