This question already has an answer here:
I'm doing Astronomy as a GCSE (at high/secondary school) and the teacher often goes above the course, and we (the students) often ask above what the course requires. But because its a GCSE there's a timeline, so sadly we can't spend a week on each subject.
Wikipedia is great, but for things like physics, to understand an article you need to read all the articles it links to and so on, it doesn't give the straight forward explanations/answers that class and stack exchange sites do.
So basically can astronomy questions be asked here? Such as 'Whats the difference between a neutron star and a pulsar?' or '[How] does the mass of a planet orbiting a star affect it's orbit?'