UNION Issue

[Nick Coronado]

Hello all, I was trying to do the following according to a website that discussed JOINS in MySQL:

SELECT user.name, course.name
FROM `user`
LEFT JOIN `course` on user.course = course.id

UNION

SELECT user.name, course.name
FROM `user`
RIGHT JOIN `course` on user.course = course.id;

When I run this query I get the response:

ERROR 1054 (42S22): Unknown column 'course.name' in 'field list'

If I enter each query separately then give me results. It's when I use UNION that I get that result. Does anyone know why? Basically the tutorial was just how to do a FULL OUTER JOIN, and said it had to be done this way.