3
None.
You would have attend about 6 years of college before you can become a Astronomer.
go to college all the years
Four to eight years of college would be required to be a forensic toxicologist.
8 years
years and years of college and a masters degree.
3 or 4 depending on what course you do
In the United Kingdom it would take 3 years.
Four years for a bachelor's degree and two years for an associates degree in whatever program they are enrolled in. Keeping in mind that they are taking the normal amount of credits and are passing all of the classes they take. There is no degree to become an author.
You can become a magician without college
12-15 years of college, medical school, and residency.
8 years