Can You Fart in Space: 10 Surprising Facts

Have you ever wondered this question ‘Can you fart in space?’.

With tight quarters and recycled air, space farts could get smelly fast but, thanks to physics, space farts actually behave quite differently than on Earth.

From traveling in all directions to not making a sound, farts in space are full of surprises.

1. Farts Behave Differently in Zero Gravity

zero gravity in space
Photo By Thales

In the weightless environment of space, farts don’t rise like they do on Earth. With no gravity to give direction, the gas from farts spreads out evenly in all directions. Astronauts have reported seeing fart clouds float randomly around the spacecraft cabin.

While this may look funny, it can cause issues as the fart particles spread widely through the enclosed air supply. Space farts demonstrate some fascinating physics, but they require careful management by astronauts!

2. Astronauts’ Farts Can Damage Space Suits

Astronauts’ Farts Can Damage Space Suits
Photo By IMDb

Astronauts have to be very careful when farting in their space suits. The gas from farts can actually cause damage if not filtered properly. Space suits have sophisticated air filtering systems to remove fart gasses and prevent a dangerous buildup of methane and hydrogen.

If not filtered, these gasses could reach flammable concentrations or cause pressure changes that damage the suit. While funny, astronaut farts in spacesuits highlight the challenges of living in extreme environments. Proper fart ventilation is crucial for spacewalks and planetary exploration!

3. Farts Could Propel Astronauts Forward

Microgravity Prevents Burping
Photo By Quartz

Believe it or not, farts produce thrust and could be used to propel astronauts in space! Because farts expand in all directions in zero gravity, the thrust generated can provide a tiny boost forward. Of course, the amount of acceleration would be minuscule and not practical for actual space travel.

NASA has not seriously proposed using astronaut farts for propulsion. While physics makes it theoretically possible, the technology still has a long way to go before fart-propelled space missions become a reality. Maybe someday space travelers will be able to boldly go where no one has gone before, powered by their own farts!

4. Floating Fart Clouds Can Be Hard to Escape

Floating Fart Clouds Can Be Hard to Escape
Photo By MaryValery / iStock via Getty Images Plus

In the confined spaces of a spacecraft, fart gases have nowhere to go. Astronaut farts can quickly fill the air with unpleasant odors. Without any convection in zero gravity, the fart gases just linger there like a stinky cloud. The gases have no way to rise away from the occupants.

An astronaut who cuts the cheese could be stuck in their own smelly cloud until the air filtration system scrubs the air clean. Plugging your nose won’t save you because the fart molecules still waft into your mouth. The moral of the story? Astronauts should lay off the beans and cabbage before a mission, or their crewmates may make them walk the space plank! Let this serve as a warning for future space travelers.

5. Farts Don’t Dissipate as Quickly in Space

space air filters
Photo By NASA

On Earth, farts dissipate into the air pretty quickly. The gas particles spread out and mix with the atmosphere. But in the enclosed interior of a spacecraft, there’s minimal air circulation. Without any airflow, fart gas lingers in a concentrated stinky cloud. There’s no gentle breeze to provide sweet relief.

The unlucky astronaut who farts could be engulfed in their own stench for an extended time. Their crewmates are also trapped in the foul fog with no escape. The only salvation is the air filtration system steadily scrubbing away at the gassy molecules. So for everyone’s sake, astronauts should stick to low-gas foods before missions. No one wants to be the stinky astronaut who hot-boxed the spacecraft!

6. Farts Can Compromise Air Quality in Spacecraft

prepackaged food items
Photo By Royal Museum Greenwich

Farts release gases like methane and hydrogen sulfide. These are not toxins, but they can reach concentrations that irritate eyes and throats. Air quality is critical for crew health and performance. On the ISS, there are systems that constantly monitor air composition. Filters scrub the air to keep CO2, VOCs, and particulates within safe ranges. But the filters can only process so much, and a concentrated burst of fart gas could overwhelm them.

The ISS has had issues with high VOCs that required troubleshooting. So deliberate farting events could cause real problems. Astronauts’ diets are carefully planned to limit gas production. Abundant legume consumption is discouraged, for example. Letting one rip may seem funny, but it could harm the delicate equilibrium of air revitalization systems. Best to hold it in for the good of the crew!

7. Flatulence Could Rupture Pressurized Cabins

pressurized spacecraft
Photo By Getty

The walls of spacecraft cabins are pressurized to mimic Earth’s atmosphere. Sudden pressure spikes could stress the vessel walls. NASA engineers use noise-cancelling headphones and acoustic panels to minimize noise. A thunderous fart could reverberate through the cabin at over 160 decibels, well above noise limits. At its loudest, the space shuttle reached 120 decibels during launch. Prolonged exposure above 85 decibels can cause hearing damage.

A large enough gas pocket released too fast could potentially rupture the vessel. While unlikely, better to play it safe. Astronauts break wind into charcoal filters in their suits during spacewalks, absorbing the odors. Similar fart-filtering should be practiced inside, too. Letting one loose irresponsibly could be an explosive mistake.

8. Farts Can Set off Smoke Alarms in Space

smoke alarm set off
Photo By Teague Security

The International Space Station and other spacecraft have highly sensitive smoke detectors. These are designed to quickly detect any possible fires, triggering alarms. The detectors use ionization technology that detects particles in the air. A dense enough fart could set off these sensitive alarms due to the gases released.

This poses an annoyance and distraction to astronauts. While not inherently dangerous, too many false alarms from flatulence could desensitize astronauts to real emergencies. Proper fart protocol requires diffusing the gas slowly to avoid triggering detectors. Air filters in suits and cabins help mitigate but don’t eliminate the risk. Letting one rip carelessly could come back to bite you in the butt when alarms sound off.

9. Spacewalks Require Special Fart-Proof Spacesuits

Spacewalks Require Special Fart-Proof Spacesuits
Photo By NASA

Astronauts wear sophisticated spacesuits designed to protect them during spacewalks outside the station. These bulky suits include a Maximum Absorbency Garment (MAG) to allow astronauts to relieve themselves if needed over the course of 6-8 hours during a spacewalk. The suits also have a built-in filtration system to remove odors and prevent any potential methane buildup.

Sensors in the ventilation system can detect gases and increase fan speeds as needed. Thankfully, the rigorous toilet routines astronauts follow pre-spacewalk and the air scrubbing technology prevent any unintentional venting. Spacesuits may look gas-tight, but NASA takes no chances, given the dangers space farts could cause during delicate repair work in the vacuum of space.

10. NASA Studies Flatulence in Space to Prevent Problems

space toilet
Photo By ESA / NewScientist

NASA has researched various aspects of passing gas in space to anticipate and mitigate potential issues. Factors like microgravity, diet, and spacesuit design can all impact space farts. Extended missions increase the risk of methane buildup from multiple crew members flatulating in the enclosed spacecraft environment.

Researchers have looked at absorbent materials, dietary changes, and charcoal filters to reduce flammable methane concentrations. While funny in movies, uncontained farts could cause real headaches during long journeys to Mars and beyond. Understanding the science allows NASA to prevent explosive decompression and keep astronaut morale high.


How Do Farts Behave in the Weightlessness of Space?

In space, farts don’t rise due to the absence of gravity. Instead, they spread out evenly in all directions. Astronauts have observed fart clouds floating randomly inside the spacecraft, which can be problematic as the particles disperse through the recycled air.

Why Can Astronaut Farts Damage Space Suits?

Farts can potentially damage space suits because they contain gases like methane and hydrogen. If these gases aren’t filtered properly, they could reach concentrations that are flammable or could cause pressure changes harmful to the suit. As a result, space suits come equipped with advanced air filtering systems.

Is It True That Farts Can Propel Astronauts Forward in Space?

Theoretically, farts produce thrust due to the expulsion of gases, which in zero gravity can cause a minute acceleration in the opposite direction. However, the thrust generated by a fart is minuscule and not practically significant for propulsion in space.


Farting in space is a unique phenomenon affected by the microgravity environment and the enclosed nature of spacecraft. Unlike on Earth, where farts dissipate relatively quickly, in space, they can linger, spread widely, and even pose potential threats to equipment and air quality. From causing minor inconveniences like setting off smoke alarms to more serious concerns like compromising air quality, astronauts need to manage flatulence with care. With NASA’s research into this humorous yet critical subject, understanding and controlling space flatulence becomes paramount, especially for the safety and comfort of astronauts during extended missions

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