07 Oct What do you need to know about Introduction to the Universe?
Introduction to the Universe (IB Option E1)
209 Seconds video showing cosmic scales:
Powers of Ten video zooming out from earth to edge of universe :
A photo showing why the Milky Way is called that:
A photo showing stars moving across the night sky due to the rotation of the earth :
Where are the Voyager spacecraft now?
It’s fascinating to look at the real-time measurement of the distance, to 8 decimal places! Because of the motion of the earth, there are times of year when the distance actually shrinks instead of growing. It takes light about 18 hours now to reach Voyager 1, which is now outside the solar system. It is amazing that it is still able to make contact with us. It has a radio that is about as strong as a refrigerator light bulb, and we are able to pick up the blinking of that light from almost 20 billion km away!
Monty Python’s Galaxy Song:
Lyrics to the Monty Python Galaxy song:
Just remember that you’re standing on a planet that’s evolving
And revolving at nine hundred miles an hour
That’s orbiting at nineteen miles a second, so it’s reckoned
A sun that is the source of all our power
The sun and you and me and all the stars that we can see
Are moving at a million miles a day
In an outer spiral arm, at forty thousand miles an hour
Of the galaxy we call the ‘Milky Way’
Our galaxy itself contains a hundred billion stars
It’s a hundred thousand light years side to side
It bulges in the middle, sixteen thousand light years thick
But out by us, it’s just three thousand light years wide
We’re thirty thousand light years from galactic central point
We go ’round every two hundred million years
And our galaxy is only one of millions of billions
In this amazing and expanding universe
The universe itself keeps on expanding and expanding
In all of the directions it can whizz
As fast as it can go, the speed of light, you know
Twelve million miles a minute and that’s the fastest speed there is
So remember, when you’re feeling very small and insecure
How amazingly unlikely is your birth
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