The art elements (line, shape, value, form, color texture, space) transcend media. They apply to drawings just as much as paintings or sculptures. But, of course, they are applied in different capacities. One can master everything with a pencil and paper except for color.
To be a concept artist you have to be creative as well as talented. A lot of being an artist is creative problem solving and generating ideas. It's not all just being able to paint well.
"Astronomy offers an aesthetic indulgence not duplicated in any other field. This is not an academic or hypothetical attraction and should require no apologies, for the beauty to be found in the skies has been universally appreciated for unrecorded centuries."