On 12 Juli, 21:38, "Androcles" wrote:
wrote in message

...
| Sirius B evidently did go Nova 120 million years ago, it is only 8.6
| light years away how could anything on earth survived such a
| blast.....

A nuclear weapon exploded over Hiroshima, Japan, on 6th August, 1945.
How could anything in the USA have survived such a blast.....

|
| Krita started 146 milj ago and ended 86 milj years ago?
|
| Is this correct?

No.

Oh you are correct Androcles it was 65 miljon years ago
But the the Triassic–Jurassic extinction event marks the boundary
between the Triassic and Jurassic periods, 199.6 million years ago,
and is one of the major extinction events.

I do not know but i see the possibility for some doubts in carbon
dating, and also when it comes to put dates on events within
astronomy. I find it reasonably to beleive that Sirius B was cause to
the Triassic-Jurassic extinction.

That leave us with the question what star did go nova when the great
dinosaurs dissapeared.

So any Astronomer out there could tell me a nearby star that did go
Nova at the end of Cretaceous–Tertiary time 65 miljon years ago, that
was a pretty major extinction event.

I know they say it was an Asteroid and sure it can have been to.