Hello, I am 10th grade student who is extremely mad at astronomy (as my nickname says), and I wrote a short book (about 70~80pages)about astronomy.
I think the quality is decent, (I didn’t show it to anyone yet) at first the book-writing thingy wasn’t the purpose for applying university. After completing a book, I thought that maybe I can put this on the admission when I become 12th grader.
Could it possibly help in applying, and have a positive effect?
Or should I just keep it in my mind and don’t show it to anyone else?
Only if it’s actually relatively important. If you self-publish something and your relatives buy a few copies, nobody’s going to be too impressed by that – anyone can self-publish.
More relevant: publish an article in a science journal. Now THAT’S something that colleges would be impressed about.
The reason why you write a book on that subject is to educate and inform. So why would you keep it to yourself? Sharing writing and getting feedback from writers and science people should be part of editing and making your writing better.
But writing a book is very different than publishing a book and having an external indication of quality. So you can always say that you write and it is an interest of yours, in your college essay or somewhere. But having some external validation is more impressive.
Happydad writes as a hobby, and has a number of writing pals who post their work at https://www.scribd.com/ I’m sure there are other websites like that as well. You also can publish your current book as a Kindle e-book on Amazon https://kdp.amazon.com/help?topicId=A17W8UM0MMSQX6 Happydad and his friends have found that writing is hard, but getting a market for the book is even harder!