(CNN) - If your romantic partner pointed you to an application for a one-way trip to Mars, would you be upset - or thrilled?
When Dr. Leila Zucker's husband sent her such an e-mail last spring, he said that he didn't want her to go but that he'd be a lousy husband if he didn't tell her about it.
Fast-forward to today: Zucker has made it past the first round of cuts forMars One, a nonprofit organization that aims to send four people to the Red Planet in 2024 and subsequent groups in later years.
"Most of us want to explore, want to go new places, and then it's just a question of: How much are you willing to give up to do it?" she said.
Zucker is one of 705 candidates selected from a pool of 200,000 applicants for the mission. The select group has been narrowed from 1,058 people as some prospective astronauts dropped out for personal or medical reasons, Mars One said recently.
All of the remaining candidates will be interviewed by the Mars One selection committee.
Eventually, only four will be picked for the first trip. Apparently, none of them is scared off by the idea that, because of technological and financial limitations, Mars One astronauts would probably never come home.