Sorry, there wasn't enough space to put anymore information.
I am 14 years old, a US citizen who lives in Australia, I'm in grade9, has a straight A report card, I am graduating grade 12 in 2018, and I am doing the International Baccalaureate diploma, the introduction year grade 10 (next year, 2016), and the actual diploma course in grades 11 and 12.
Look at this site: Mysummeradvisor.com and type "NASA" into the institution field on the homepage. It will take you to some information about internships with NASA. (You may need to be a US citizen). There is also an article about careers in physics and a feature about a summer program for high school students in astronomy. (It's a prestigious and very competitive program and I think they take international students).
http://nasajobs.nasa.gov/jobs/civil_service_jobs/career/page10.htm
As you can see, the easiest way is an engineering degree. Bachelors degree is pretty much all you need for any engineering field. Since it's a government job, it doesn't matter where you get it as long as it's ABET accredited.
But something you must do is finding a mentor who works at NASA. Only through a mentorship will you get a good chance at getting a job there. During college, you need to apply for a co-op or internship. Through those co-ops, you'll have the chance to gain someone's recognition. If you can't get a co-op at NASA, then get a co-op at one of the many companies they contract. Openings at NASA are getting less and less, you can have the best grades in the world but unless you put yourself out there in the field you don't mean anything to anybody.
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