This page lists what we actually have for Edexcel GCSE Astronomy 1AS0. It is built from the live activities, so it is accurate on the day you read it.
One physics topic, expanded into sixteen
Every other board and subject page on this site sits next to a rival board's version of the same course. This one does not. Astronomy is the only subject in our curriculum data with a single specification, so the usual first question, which board, does not arise.
The comparison that does matter is with physics. A GCSE Physics specification carries astronomy as one topic among eight or fifteen, depending on the board. Edexcel names it Astronomy and puts it in Paper 1. AQA calls it Space physics. Either way it is one topic, and here the same subject is sixteen topics with nothing beneath them, eight in Paper 1 and eight in Paper 2.
That flat structure is useful in itself. There is no hierarchy to navigate and no topic large enough to need breaking down, so each of the sixteen is already about the size of one revision session.
The half physics revision reaches
The Paper 2 topics are the ones a physics teacher will recognise. Planetary motion and gravity, stellar evolution, and redshift and the Big Bang all have a counterpart in a physics course, and a student who has revised those for physics is not starting from nothing.
If you teach both, this is where to lean on what you already do. It is also where students taking both subjects get the most out of revising once.
The half it does not
The Paper 1 topics are a different matter. Astronomical time and the equation of time. Finding longitude by shadow, sundial and chronometer. The lunar disc, libration and precession. Celestial and horizon coordinate systems. Early models of the Solar System.
None of that appears in any other GCSE. No other subject on a student's timetable touches it during the week, and there is no incidental reinforcement from anywhere else.
The practical consequence is about spacing rather than content. In most subjects a topic gets revisited by accident: a related lesson, an overlapping subject, a question in something else. Here the Paper 1 material only comes back if somebody deliberately brings it back. If you are planning a revision cycle for this course, weight it towards the first eight topics, not because they are harder but because nothing else is keeping them alive.
What the activities ask students to do
Every one is between fifteen and twenty minutes, which is a narrower range than any other subject here. There is no long activity and no five minute one.
Eleven of the twenty-two ask the student both to work out a value and to set out an explanation in the same activity. That follows a subject that keeps putting the two together: work out an altitude, then say why it changes with the seasons.
The three activities embedded below are playable here without an account.
Finding the right one
The lists below group by classroom use, worked out from what each activity contains. Homework is not a heading, because all twenty-two suit it and a heading holding everything separates nothing.
Independent study is the largest real grouping, at seventeen of the twenty-two. That fits a course where the material is unlike anything else a student is studying and repetition has to be deliberate. What makes students keep going without supervision, and where that stops working, is covered in independent revision students actually keep doing.
Using them
None of it needs marking. The arithmetic of what that saves, and what still needs a person, is on GCSE revision without a second marking load. For a whole course plan rather than a single session, see designing a GCSE revision programme. To put several in front of one class in order, build a sprint.
Everything else we have, by subject and board, is on the revision pages.
What this page does not do
It is one pass, not a bank. Ten of the sixteen topics have a single activity behind them, so a student who works through it once has used most of what is here.
It cannot help with observing. Two topics are about observation and the activities cover the knowledge in them, but nothing on a screen substitutes for finding something in a real sky.
It does not track anything, so there is no completion list to check.