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Space burial: Astronauts who die during Mars mission can be cremated by surviving crew members
By Virgilio Marin // Aug 25, 2021

Mars is currently humanity's best shot at exploring another alien world. But while it's not engulfed in greenhouse gases like Venus, the Red Planet is not Earth-like either. As the risk of death is high during a Mars mission, dealing with the corpse of a dead astronaut is something that space agencies have to be ready for. When a crew member tragically dies, it will take months or years before his remains are brought home – if that's logistically possible at all.


In an article for Popular Science, space writer Shannon Stirone wrote about the options that surviving crew members have when faced with the unfortunate task of disposing of a dead astronaut's body. Among other things, survivors can jettison the body in space, cremate it on the Red Planet or, according to some bioethicists, eat the remains of their dead crewmate if their food supply runs out.

Disposing of a corpse during a Mars mission

The National Aeronautics and Space Administration (NASA) is looking to send the first man to Mars in a few decades, but that is not going to be easy. Besides being 170 million miles from Earth, the Red Planet is bereft of a robust atmosphere and magnetic field. In the absence of these natural shields, cosmic rays and ionizing radiation reach the Martian surface virtually unfiltered.

Despite these dangers, NASA hasn't established any protocols for dealing with the untimely death of one of its astronauts.

"NASA does not prepare contingency plans for all remote risks," the space agency told Stirone. "NASA's response to any unplanned on-orbit situation will be determined in a real time collaborative process."

Thirty astronauts have so far died during spaceflight, but only three of them have actually died in outer space. In 1971, a trio of Soviet Union cosmonauts spent nearly a month onboard a space station orbiting Earth. On their way home, a faulty valve seal in their return capsule burst open, killing all three of them in an instant.

But the capsule carrying the men managed to return to Earth intact. In fact, when the capsule landed, recovery crews were surprised to see the cosmonauts dead. Nothing about the crew's re-entry indicated that something had gone wrong.

Because no one has actually died beyond Earth's immediate neighborhood, it remains to be seen what a space burial looks like in real life.

"The real interesting question is, what happens on a mission to Mars or on the lunar space station if there were [a death]," Emory University bioethicist Paul Wolpe told Stirone. "What happens when it may be months or years before a body can get back to Earth – or where it's impractical to bring the body back at all?"

There are a few burial options. If an astronaut dies during the voyage to Mars, the body can be placed in cold storage until the spacecraft touches down. It can also be freeze-dried; it would be held outside the capsule and the cold of space should cover it in ice.

If that's not an option, the deceased can be jettisoned. It would become locked in the spacecraft's path and linger exactly where it would be let go. Plus, there is no rule that forbids dumping a corpse in space.

"Currently, there are no specific guidelines in planetary protection policy, at either NASA or the international level, that would address 'burial' of a deceased astronaut by release into space," Catherine Conley of NASA's Office of Planetary Protection said.

If a corpse reaches Mars or someone dies on the planet, the remaining crew members can give the dead a proper Martian burial. This entails cremating the body to prevent contaminating the planet with terrestrial microbes.

"Regarding the disposal of organic material (including bodies) on Mars," Conley said, "we impose no restrictions so long as all Earth microbes have been killed, so cremation would be necessary." (Related: Space cooties: Should astronauts be worried about fungi on space stations?)

Resorting to cannibalism to survive in space?

An equally important question is whether surviving crew members should be permitted to eat their crewmate in case of an emergency. This has happened before in the aftermath of the 1971 Andes flight disaster.

After their plane crashed in the Andes Mountains, survivors were stranded in the snow-packed mountain for over two months. With limited food and no means of communication, they made the hard decision to feed on some of the dead passengers – most of which were their own family and friends.

Thorpe says that the opinion on cannibalism is split: "There are two kinds of approaches to it. One says even though we owe the body an enormous amount of respect, life is primary, and if the only way one could possibly survive would be to eat a body, it's acceptable but not desirable."

Learn more about the dangers of space exploration at Space.news.

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