Cliodhna,
some of the concepts you have suggested would be suitable for older children, where the Irish curriculum has (for 1st/2nd class)
“identify the sun, the moon, stars, day and night”
I’d think that going into the life cycle of stars is probably too much. I know that some children are interested in black holes and the ideas around them, but linking mass of a star to its ultimate fate is something I used to teach at second level.
There is background for teachers at https://imagine.gsfc.nasa.gov/educators/lifecycles/LC_main3.html
and a poster: file:///C:/Users/frances.mccarthy/Pictures/SummerSchool_2024/imagine.pdf
and there are some second level activities on that same page.
