Hello, I'd like to ask a few questions related to career choices and the requirements to become an astronomer or astrophysicist. I'm an eighth grade student from Brazil and, since I was a child, I have always been fascinated with planets, stars, galaxies, the universe itself, and the explanations for the way it works. I have been studying Physics by myself for two years now, only with my brother's old textbooks and the internet. The educational system in Brazil's schools is horrific and I don't believe the universities are any better. With this in mind, I have been wanting to study in another country when I finish high school, despite the government's lack of support. My first question is: how difficult is it for a foreign student to enter a good college in places such as Britain or the United States? I understand some of the requirements related to a work in Astronomy, such as being good at Mathematics and Programming; being willing to spend hours, even days, studying or researching; finding logical solutions when facing a problem; etc. I am not only good at Maths, but I also enjoy it. I know basically nothing of Programming, but I intend to learn it within the next years. Becoming a scientist is the most important achievement for me, so I would do anything for it. Another question: are there any other aspects I should know about? Such as subjects in which I should have basic knowledge before entering college? Additional information: I am aware that, to enter a university in another country, one should have good grades in the latest years of school. In my case that wouldn't be a problem: so far, I have gotten A's in almost every subject, and I don't believe high school would be different. P.S.: If the thread is misplaced within the category, just let me know and I will relocate it. Also, I apologise for any grammar mistakes I might have made (I'm self-taught at English).