1035 years: I’ve lived a long and eventful life, but I
know that death is almost upon me. Around me, my kind are slowly melting into
the darkness that is now the universe, and my time will eventually come. I’ve lived a long and
10-43 seconds: A time of unbelievable light, unbelievable
heat! I don’t remember the time before I was born, but I was there,
disembodied, ethereal, part of the swirling, roaring fires of the universe coming
in to being. But the universe cooled. From the featureless
inferno, its character crystalized into a seething sea of particles and forces.
Electrons and quarks tore about, smashing and crashing into photons and
neutrinos. The universe continued to cool. 1 second: The intensity of the heat steadily died away, and I was born. In
truth, there was no precise moment of my birth, but as the universe cooled my
innards, free quarks, bound together, and I was suddenly there! A proton! But my existence seemed fleet…
I hate starting every blog post with an apology as I have been busy, but I have. But I have. Teaching Electromagnetism to our first year class, computational physics using MatLab, and six smart talented students to wrangle, takes up a lot of time.
But I continue to try and learn a new thing every day! And so here's a short summary of what I've been doing recently.
There's no secret I love maths. I'm not skilled enough to be a mathematician, but I am an avid user. One of the things I love about maths is its shock value. What, I hear you say, shock? Yes, shock.
I remember when I discovered that trigonometric functions can be written as infinite series, and finding you can calculate these series numerically on a computer by adding the terms together, getting more and more accurate as we add higher terms.
And then there is Fourier Series! The fact that you can add these trigonometric functions together, appropriately weighted, to make other functions, functions that look …
A little look down the comments tho, and we see several claims that what Derek says is not correct. Here's a little excerpt
Well, as a cosmologist, I was surprised to read that the Hubble Sphere is an "outdated concept" having seen it used in a professional meeting last week. But let's take a look at the other claims that are made by "fullyawakened" - I must admit they have the lead on me as I am partiallyjetlagged at the moment. As ever, I am going to steal Tamara Davis's standard cosmological picture in a few different sets of coordinates to do this. I've explained these before, but the top one has distance as we know it along the x-axis, and time as we experience it up the y-axis.
"Our observable Universe is getting smaller" is simply wrong. Let's look at the bottom figure, which is i…