12 Things Astronauts Aren’t Allowed to Bring to Space


Blast off to space! It’s a dream for many, a reality for a select few brave astronauts. But before astronauts can float among the stars and conduct science experiments, they face a strict packing list. Many personal and familiar items are off-limits.

Life in space is a finely tuned operation where every gram and inch counts. Bringing unauthorized items isn’t just a packing faux pas; it could jeopardize the mission or the health of the crew. That’s why certain everyday items are banned—because they could threaten the mission or crew safety. So, what exactly are these cosmic no-nos? Let’s explore the surprising items astronauts have to leave behind when they venture into the great unknown.

Food That Creates Crumbs

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In the microgravity environment of space, crumbs don’t just fall to the floor – they float around. They can get into sensitive equipment, ventilation systems, or even the astronauts’ eyes and lungs. That’s why astronauts’ food is often specially prepared in sealed pouches or as semi-liquids. Think carefully about your favorite crunchy snacks; they’re generally off the menu.

Too Much Personal Stuff

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While astronauts can bring a small Personal Preference Kit (PPK) with sentimental items, space is at a premium. Every ounce launched into orbit is incredibly costly, and space on spacecraft is tightly controlled. The PPK is usually about the size of a small lunchbox. For instance, on Space Shuttle missions, the PPK volume was typically less than one cubic foot. So, while a family photo or a small inspiration token might cut, your extensive collection of Beanie Babies will have to wait back on Earth. It’s all about keeping things lean and mean for the journey.

Glass Containers

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The risk of breakage makes glass containers a no-go in space. Shards of glass floating around in zero gravity would be incredibly dangerous and challenging to clean up. Space food is packaged in lightweight, flexible packaging designed to withstand the rigors of launch and the space environment. This helps to maintain a safe and hazard-free living space for the crew.

Certain Liquids in Open Containers

bottles of oil.
Photo Credit: Alexander Prokopenko/Shutterstock.

Just like crumbs, liquids in open containers don’t stay put in space. They form floating blobs, which can be messy and potentially harmful if they come into contact with electrical equipment. All beverages and even some food items containing liquids are packaged in sealed pouches or containers with special dispensing mechanisms to prevent spills and floating droplets. This is a fundamental aspect of spacecraft design and operational procedures.

Matches and Lighters (Traditional)

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Photo Credit: Pexels

Open flames are a significant fire hazard in the enclosed, oxygen-rich environment of a spacecraft. While some specialized heating elements are used for cooking, traditional matches and lighters with open flames are strictly prohibited. Any ignition sources must be carefully controlled and designed for the specific space environment to prevent accidents. Safety is always the top priority on any space mission.

Pressurized Aerosol Cans

Close-up image of colorful spray paint cans arranged in a row, showcasing creativity and urban art.
Photo Credit: Luis Quintero/Pexels

Pressurized aerosol cans pose several risks in space. The changes in pressure during launch and in the vacuum of space could cause them to leak or even explode. Additionally, the contents released could be flammable or harmful to the spacecraft’s atmosphere and filtration systems. Astronauts use specially designed, non-pressurized dispensers for items like water and other beverages.

Certain Electronics That Emit Gases

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Photo Credit: Analogicus/Pixabay

Some electronic devices and their batteries can emit gases, especially under the stresses of launch and the space environment. These gases could be toxic or contaminate the spacecraft’s air supply. All electronic equipment intended for use in space undergoes rigorous testing to ensure it meets strict off-gassing standards. This is vital for maintaining a breathable and healthy atmosphere for the crew. According to NASA data, a safe and breathable atmosphere is crucial to human health and performance on long-duration space missions.

Perfumes and Strong Scents

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Strong perfumes and heavily scented products are generally discouraged or prohibited on spacecraft. In the confined environment, pungent odors can be overwhelming and irritating to other crew members. Additionally, some fragrances contain volatile organic compounds (VOCs) that could potentially affect the spacecraft’s air quality monitoring systems. Maintaining a neutral and breathable air quality is essential for everyone’s comfort and well-being.

Plants and Soil (Usually)

Misting plants.
Image credit Svitlana Hulko/Shutterstock.

While experiments with growing plants in space are ongoing and crucial for long-duration missions and potential space colonization, bringing personal plants with soil is usually not allowed on shorter missions. Soil can introduce microorganisms, fungi, and other contaminants into the spacecraft’s controlled environment. Any plant life brought to space is typically part of carefully controlled scientific experiments. However, in 2015, astronauts aboard the International Space Station (ISS) enjoyed their first space-grown salad, a significant step towards self-sufficiency in space.

Pets

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As much as astronauts might miss their furry friends, bringing pets to space is generally not feasible. The logistical challenges of caring for animals in microgravity, including feeding, waste disposal, and their overall well-being in a confined and stressful environment, are significant. There are also concerns about potential allergies and the introduction of non-native species to other celestial bodies in the future.

Cash and Credit Cards

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Image Credit: Pexels

Money, in its earthly forms like cash and credit cards, has absolutely no use in the vacuum of space. There are no shops or restaurants to spend it in (yet!). Everything an astronaut needs is provided for them. While sentimental value may exist, these items serve no practical purpose during a mission and would occupy precious space and weight allowance. It’s a different kind of economy up there!

Certain Medications (Non-Essential)

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Astronauts undergo rigorous medical screenings and are provided with a specific set of medications deemed necessary for the mission. Bringing personal, non-essential medications could interfere with the mission’s medical protocols or have unforeseen interactions in the space environment. All medications for space travel are carefully selected and tested. NASA’s Johnson Space Center has a dedicated Space Medicine division that oversees the health of astronauts.

Holiday Decorations
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While astronauts sometimes celebrate holidays in space with small, practical decorations, bringing large or elaborate festive items is generally not allowed. Space is limited, and anything brought along needs to serve a purpose or be extremely lightweight and safe. Think small, non-flammable, and easily stowed. It’s about bringing a touch of home without adding unnecessary bulk or hazards.

Disclaimer This list is solely the author’s opinion based on research and publicly available information. It is not intended to be professional advice.

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