Sci-fi space adventure

Hello everyone. I read a really amazing book (and I think there was more than 1) about 2 decades ago now and I can’t remember the title or author.

I do remember that:

1. There was a character named Marada - I think it was a man, maybe it was a ship- I remember discussing this character name with an Irish friend who said that he would have expected it to be a woman’s name, so I don’t think it was in the book.

2. they had suits for space walks and exploring other planets that would go in their nose and line their lungs somehow.

I really appreciate you all taking the time to help me out on this one. I’d love to read it again!