On 11/08/2019 21:25, Tim Streater wrote:
In article , The Natural Philosopher
wrote:

On 11/08/2019 17:00, Tim Streater wrote:
In article , "dennis@home"
wrote:

On 11/08/2019 12:37, Dave Plowman (News) wrote:
In article , The Natural Philosopher
wrote:
The 'best of all worlds' power is about 30% hydro 70% nuclear. 0%
renewable.

FFS. Hydro isn't a renewable now in Turnip's world. Means we are
going to
run out of water at some point. Then, power will be the least of your
worries.

There are no renewable energy sources that we know of.

Even the Sun is using up fusible elements, its just got a lot of
them to use up.
Once they all get to iron fusion will stop as the Sun doesn't get
hot enough to fuse them and can't get any energy out.

Sun won't get that far. Carbon will be its limit.

Will it supernova?

No. Nothing like big enough. A (much, 30 or so solar masses) larger
star would go through the extra fusion phases Dennis mentioned, until
there was a substantial iron core to it. Up to then, all fusion phases
are exothermic. Fusing iron and above is endothermic. At this point the
star has onion-like layers, fusing hydrogen on the outermost layer, and
silicon on the layer just above the iron core.

The core (if larger than about 1.4 solar masses IIRC) may collapse to a
neutron star, leaving a void into which the rest of the star collapses.
It's during the collapse and subsequent events that heavier than iron
elements are produced (Winky has much more detail). And the *******
then, for a while, outshines the other 500 billion or so other stars
put together.

You don't want to be less than 500 light years away from one of these
when it goes off.

Especially if the AA dont get there in time


--
A lie can travel halfway around the world while the truth is putting on
its shoes.