Download Astronomy

In fact all our atoms were
formed in a star long ago
The star then blew up and
blasted our atoms into space
and after aeons they ended
up here
Laser
focused on
graphite
Expanding carbon plasma beam
But do not worry too much–
it will be in about 5,000,000,000 years
At Sussex David Walton (shown here with a
model of C24 ) and coworkers had synthesised
chain molecules with up to 32 carbon atoms
This part of our story
starts out in space
Hot gas cloud –
the famous Orion
Nebulae
At the centre is
the Trapezium
Cluster of very
hot new stars
The star then exploded and blew
our atoms out into space
Our Earth goes round the Sun
The Sun is a Star – Our Star
Stars cluster together in Galaxies
about 100 billion stars in a Galaxy
100,000,000,000 Stars = 1011
11 zeros
Galaxies are spread across the Universe
100,000,000,000 Galaxies = 1011
In the Universe
100 000 000 000 x 100 000 000 000
= 10 000 000 000 000 000 000 000
22 zeros
1022
stars in the Universe
So
10,000,000,000,000,000,000,000
1022
is
a
number
As well as stars
we can see hot and cold clouds
by looking along the galactic plane
The Milky Way from the side
It is discus shaped
The Milky Way from above
This is a very
There are 10 dots here
………,
How many here?
………, ………, ………, ………, ………, ………, ………, ………, ………, ………,
100
………, ………, ………, ………, ………, ………, ………, ………, ………, ………,
How many here?
………, ………, ………, ………, ………, ………, ………, ………, ………, ………,
………, ………, ………, ………, ………, ………, ………, ………, ………, ………,
………, ………, ………, ………, ………, ………, ………, ………, ………, ………,
………, ………, ………, ………, ………, ………, ………, ………, ………, ………,
………, ………, ………, ………, ………, ………, ………, ………, ………, ………,
………, ………, ………, ………, ………, ………, ………, ………, ………, ………,
………, ………, ………, ………, ………, ………, ………, ………, ………, ………,
………, ………, ………, ………, ………, ………, ………, ………, ………, ………,
………, ………, ………, ………, ………, ………, ………, ………, ………, ………,
………, ………, ………, ………, ………, ………, ………, ………, ………, ………,
1000
………, ………, ………, ………, ………, ………, ………, ………, ………, ………,
………, ………, ………, ………, ………, ………, ………, ………, ………, ………,
………, ………, ………, ………, ………, ………, ………, ………, ………, ………,
………, ………, ………, ………, ………, ………, ………, ………, ………, ………,
………, ………, ………, ………, ………, ………, ………, ………, ………, ………,
………, ………, ………, ………, ………, ………, ………, ………, ………, ………,
………, ………, ………, ………, ………, ………, ………, ………, ………, ………,
………, ………, ………, ………, ………, ………, ………, ………, ………, ………,
………, ………, ………, ………, ………, ………, ………, ………, ………, ………,
………, ………, ………, ………, ………, ………, ………, ………, ………, ………,
We can make a tiny exploding star in a
laboratory – How?
There are two strands in the story
–
one starts out in space…..
Stars cluster together in galaxies…
and there are about 1011 stars in a galaxy
There are about 1011 galaxies in the Universe
So about 1022 stars altogether
As well as stars
the galaxies also contain
massive clouds of gas and dust
There are also massive cold black clouds
of gas and dust inside which – hidden from
(optical) view - new stars form
Exploding star blowing gas and dust (red
scattering) into space
(Mike Jura, ucla)
CO HC2O H2O
HCN NH3
CH3CH2OH
HCCCN
Many small molecules detected (1968-) in the dark clouds
like these which lie in the Milky Way galactic plane
Using the Canadian telescope (1975-80)
we detected long carbon chain molecules
in the black interstellar clouds
HCCCCCN
HCCCCCCCN
HCCCCCCCCN
HCCCCCN
HCCCCCCCN
HCCCCCCCCN
with Oka Avery Broten McLeod (NRC Canada)
and Alexander Kirby Walton (Sussex UK)
Exploding
star
blowing
gas and
dust the
red
scattering
out into
space
Mike Jura, ucla
We can see stars and black clouds in space
H–CC–CC–CN
H–CC–CC–CC–CN
H–CC–CC–CC–CC–CN
Molecular clouds in Taurus;
indicates TMC1 where chains detected
NRC 46m Radiotelescope in Algonquin Park Ontario, Canada