At the beginning of your second year
You filled out feedback forms, giving us your ideas
On how the physics course, might be improved

We hope that you feel we have listened to you

Now some of you may be wondering

Why I have now decided to sing
Well, would you believe that in another class
Somebody had the audacity to ask for

More musical numbers
More physics sing-a-longs
And so, for that reason, I've written you a song


In chapter 12 we've taken a journey
Through matter, space and time

Unlocking the mystery of the Universe's history
With a touch of relativity thanks to Albert Einstein


The Universe is very large, the Universe is very old
And although it is filled with stars, the Universe is very cold
And much of outer space is just empty space

And it keeps on expanding at an alarming pace.
To calculate the speed at which the galaxies recede
You can use Hubble's Law, v = Hd


We live on a planet; it orbits a star
The distance between them is pretty far

But that's nothing in comparison to the distance to Proxima Centauri
It takes over four years for its light to reach your eye


The galaxy contains about 100 billion stars
And there are about 100 billion galaxies like ours
And if we look back far enough; 300,000 years after creation

That is when we first see the Cosmic Microwave Background Radiation
Which is evidence for a Big Bang,
Although it's not immediately apparent

This relic radiation was formed
When the Universe became transparent


We looked at radar, we learned the facts
We went outside to measure parallax
Using a lightbulb and a ruler we saw

That distant objects are dimmer, it's called the inverse square law
We used computers to find the Hubble constant
At times I talked a load of nonsense (this isn't actually true)

Some homework tasks were hard, others were easy
Many of my jokes, including this song, were pretty cheesey
But keep asking questions, remain inquisitive

Because asking questions is what physics is

I hope you've enjoyed the start of your second year

And have a lovely summer and drink lots of water
And we look forward to seeing you back here
For the remainder of the course in the autumn

You can come back for more physics fun
And if you're lucky/unlucky (delete as appropriate) another physics song
But until then, have a great summer everyone