about a year
I'm studying to become an astronomer.
You would have attend about 6 years of college before you can become a Astronomer.
The astronomer studied distant galaxies using a powerful telescope.
Being an astronomer.
once they become an astronomer, until they die or when they choose to retire or quit.
about a year
4
because he wanted too
He wanted to go and look at space
These days its almost all inside - with computers.
You aren't, technically speaking, required to attend college at all to become an astronomer. However, if you want to be hired as an astronomer and get paid as opposed to doing it as a hobby and buying all your own equipment, you should expect to minimally get a 4-year bachelor's degree in Astronomy or possibly Physics.
You need some advance math and physic skills.