Sunday, 24 August 2025

JWST data.

 I just got some JWST data from the NASA MAST website. There is a lot of data there available to the public so I used chatGPT5 to help me download it and process a random picture. 



This is part of M1 the crab nebula which is just to the right or Orion in the constellation of Taurus. 

I got chatGPT to image process it and I got this:








So you can see part of the JWST at this wavelength 7.7 micrometres which you cannot see in the original. This was taken in about 2024 and they are studying  (chatGPT lookup)
  • A map of dust and molecules in the nebula.

  • A test of supernova explosion models.

  • A way to measure how much dust survives after 1,000 years.

  • Key data to decide whether the Crab is a rare electron-capture supernova remnant.


The star exploded as a supernova in 1054 and was documented historically as you could see it during the daytime. 

JWST is a million miles away at the L2 point in space.


Saturday, 23 August 2025

Age of the Universe with chatGPT5

I got a science degree in the 1990's and am running a few ideas on chatGPT5. 

I wondered if I could recreate the Edwin Hubble graph of the universe with modern data. 

Hubble looked at areas of the sky with his telescope where there appear to be fuzzy cloud type objects. In the Andromeda area could he saw a special type of variable star called a Cephid variable. Using this star allows you to calculate distance and he realised that Andromeda is so far away (2.5 million light years) that it was another Galaxy. 

The next step is the easy one you put the light from Andromeda through a prism (diffraction grating) and then you can see little black lines in the spectra like you see in our sun. However the absorption lines are slightly moved to the left a little bit and then you can calculate from this the blue shift and so the velocity of the Galaxy. 

So Hubble did this with 24 Galaxies and then plotted them onto a graph of Velocity vs Distance. He got a straight line and surprisingly saw 3 blue shifted Galaxies coming towards and 21 Galaxies flying away from us (red shifted). Also the further the Galaxy the faster the velocity.





This indicates that all of the Galaxies were at one time close together and that there was sort of an explosion that pushed them apart (Big bang)

I used chatGPT to recreate this graph and it looked up the modern data that we have in various star charts and it then plotted, it only could find data for 22 rather than 24:


The gradient of this graph is known as the Hubble constant (H).

Hubble got H to be 500 but he made an error in distance calculations but was correct in principle. My data gets H=59. 

To get the age of the universe you calculate 1/H

ChatGPT5 did all the conversion of H from  km s⁻¹ Mpc⁻¹ into 1/seconds.

I got the age of the universe to be 16.6 billion years. Not bad as it it is about 14 billion.

This all took about 5 minutes as I was sitting on my sofa having a cup of tea.



Friday, 15 August 2025

Global Rank on Youtube using ChatGPT5

 I used ChatGPT5 to estimate the world ranking you have when you hit between 1000 and 2000 subscribers. You start with a global rank of 10.1 million when you hit 1000 subscribers but by the time you hit 2000 you leap over 4.5 million and get a rank of  5.5 million. 

This is like a video game leader board , currently  Mr Beast is at 1. 

ChatGPT5 used a power law to do this as the official data is banded into groups 1000 to 9999 and then 10000 to 99999 etc.


It uses this function:






Also today I just noticed I have 10 free level Patrons:

1/5 of a million views.

200,000 views on my channel.   Channel was created when I bought a new computer in 2019 but Jan 2023 was when I started the lesson videos. I...