Expedition 46 Commander Scott Kelly during a three-hour and 16-minute spacewalk on Dec. 21, 2015.

NASA

Ground control to Major Tom: What happens when an astronaut needs to use the bathroom? Out of all the innovations developed in mankinds quest to go forth and explore the universe, NASA has still not moved beyond the adult diaper for astronauts who need to relieve themselves when they head out for a spacewalk or during a rocket launch.

Yes, its gross, but thanks to the 60-day Space Poop Challenge, spearheaded by crowdfunding platform HeroX with the support of NASA has come up with some inventive solutions for responding to natures call in zero gravity.

On Wednesday, HeroX revealed the three winners of the contest, which called for solutions to human waste management inside a spacesuit while still protecting the health and safety of its astronaut occupant for up to six days. The challenge specified just what quantity would need to be managed during that time. Current spacesuit-compatible adult diapers last for less than one day.

We are very excited to have had the opportunity to partner with NASAs Johnson Space Center on this challenge, HeroX CEO Christian Cotichini said in a press release The opportunity to contribute to future NASA missions by helping to protect astronaut health and safety, combined with the curiosity that surrounds performing the most basic of human bodily functionsin microgravity, seemed like a perfect HeroX crowdsourcing opportunity.

More than 5,000 solutions were proposed, according to HeroX, and teams from all over the world participated in the competition. Some people submitted as individuals while others contributed as a team. Eventually the judges narrowed the field down to 21 finalists before naming the winners.

HeroX

First prize went to Col. Thatcher R. Cardon, a U.S. Air Force officer and physician. His proposal centers on an access port that covers the perineum a more polite way of describing the crotch zone under the tailbone. It has two flaps that open out and a small valve through which waste can be expelled from the suit.

His idea came from invasive surgery where, as Cardon told the Washington Post, you have to do a lot of complex things in a very small opening.

Cardons design won him a $15,000 prize.

A team called the Space Poop Unification of Doctors (SPUDs) won second place worth $10,000 for an air-powered waste-disposal system.

The $5,000 third-place prize went to Hugo Shelley for the SWIMSuitZero Gravity Underwear, which features a catheter design that can be used in microgravity. The unique undergarment compresses, seals and sanitizes solid waste, according to Shelleys description.

These designs wont necessarily be put directly into use in space anytime soon, but the contest could lead the way for innovations down the line.

It was wonderful to see the global response from our crowdsourcing challenge, Kirstyn Johnson, Space Suit Technology Engineer at NASA, said in a statement. We enjoyed seeing the innovative approaches that were sent in given such a demanding scenario. Others at NASA are now thinking about ways we can leverage a crowdsourcing approach to solve some more of our spaceflight challenges.

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NASA completes its "space poop challenge" - CBS News