There are around 170 known moons
in our Solar System – don’t worry we are not going to cover them all
tonight! We are going
to look at some of larger moons and also some
of the more interesting ones discovered to date. It is worth
noting that although
we have images of many moons, not a great deal is
still known about the majority. Information has been gathered by
and although we do know quite a lot about some, we are left
intrigued by others as they hint at what they hold secret.
there is much for us still to learn and I’ve no doubt some
startling discoveries are still to be made here on our own doorstep.
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How do stars shine?
What makes a star shine? Its a question, more often asked of the Sun
over millennia, but it
applies to stars as well. It is only relatively recently we’ve had an
answer to that.
do stars shine
How do BIG stars shine?
So last time we went through the nuclear reaction that powers the Sun.
Its called the protonproton
chain (PP), and it wasn’t so hard - was it? OK there is a lot of maths
physics in the details, but hopefully you got the basics, and can now
class yourself as a trainee
do BIG stars shine
When stars go off road!
We’ve seen how stars shine, and there are at least a couple of ways
they go about converting
hydrogen to helium. In the process releasing a lot of energy, which is
what makes them shine.
Stars go of road
When Stars Go Bang
I mentioned briefly last time what happens when stars die, mentioning
in passing that big stars
often go off with a bang. The subject here though is the detail of what
happens when stars of
with a bang.
Stars go bang
When stars die
So we have seen how stars live, and how they can extend their lives by
switching to helium, an
available but less efficient forms of fuel.
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