What Watch Do Astronauts Wear?

The field of space exploration has always captured the imagination of humanity. From the early days of space travel to modern missions, every aspect of an astronaut’s gear has been carefully chosen to meet the challenges of outer space.

Among the various pieces of equipment, astronauts rely on, the watch they wear plays a crucial role in their daily activities. In this article, we will explore the fascinating world of astronaut timekeeping and answer the question: What watches do astronauts wear?

Astronauts require reliable and accurate timekeeping devices to ensure precise mission schedules, synchronization, and coordination. The watches chosen for space missions undergo rigorous testing and meet specific criteria to withstand the extreme conditions of space travel.

Let’s delve into the history, the iconic watches, and the modern choices worn by astronauts, as well as the features that make a watch suitable for space exploration.

Historical Overview of Watches in Space

Boldly venturing into space, watches have accompanied astronauts on their extraordinary journeys. The significance of timekeeping in space can be traced back to the first manned mission.

On April 12, 1961, Yuri Gagarin became the first human to travel to space wearing a Sturmanskie watch. This historic event paved the way for watches to become an integral part of space missions.

In the United States, Scott Carpenter’s Mercury-Atlas 7 mission in 1962 marked the first time an American astronaut wore a wristwatch in space. Carpenter donned a Breitling Navitimer, a timepiece known for its chronograph and slide rule functions.

The Iconic Moonwatch: Omega Speedmaster

The Omega Speedmaster holds a special place in space exploration history. Known as the “Moonwatch,” it earned this iconic nickname by being the first watch worn on the moon during NASA’s Apollo 11 mission in 1969. The Speedmaster successfully passed NASA’s demanding tests for spaceflight and became the official watch for astronauts.

The Omega Speedmaster’s reliability, durability, and precision are key attributes that made it suitable for space exploration. Its manual-winding movement, robust construction, and clear visibility in all lighting conditions set it apart as a trusted companion for astronauts.

What Watches Do Astronauts Wear Today?

Currently, NASA has specific guidelines for watches worn by astronauts. While the Omega Speedmaster remains a popular choice, other brands have also made their mark in space exploration.

The Fortis Official Cosmonauts Chronograph, known for its durability and legibility, has been worn by Russian cosmonauts. The Sinn 140/142 Space Chronograph, with its antimagnetic properties and functionality, has also found its way into space.

In addition to mechanical watches, digital timepieces have made their presence felt. The G-Shock DW5600E-1V, known for its ruggedness and shock resistance, has been a favorite among astronauts for its reliability in zero-gravity environments.

The Digital Shift: Smartwatches in Space

With the rise of smartwatches, these technologically advanced timepieces have also found their way into space missions. The Samsung Gear 2 and Apple Watch have been tested for their compatibility with the unique challenges of space travel.

Smartwatches offer features like health monitoring, communication capabilities, and customizable interfaces, enhancing the efficiency and effectiveness of astronauts’ tasks.

While smartwatches have made inroads into space exploration, traditional mechanical watches continue to be preferred for their reliability in extreme conditions and their timeless appeal.

What Makes a Watch Suitable for Space?

A watch destined for space must possess specific attributes to withstand the harsh environment beyond Earth’s atmosphere. Extreme temperature variations, vacuum conditions, and high levels of radiation pose significant challenges for timekeeping devices. Space-approved watches undergo stringent testing to ensure their reliability and accuracy in these conditions.

One of the key factors that make a watch suitable for space is its ability to withstand extreme temperature fluctuations. In space, temperatures can range from scorching hot to freezing cold. A watch designed for space must be able to function flawlessly under such extreme conditions without compromising accuracy or damaging its internal components.

Another critical consideration is the vacuum environment of space. Watches must be sealed tightly to prevent the entry of any dust, moisture, or particles that could disrupt their mechanisms. Space-approved watches undergo rigorous testing to ensure they are airtight and can maintain their integrity in the vacuum of space.

Radiation is also a significant concern in space. The levels of radiation encountered beyond Earth’s protective atmosphere are much higher than those experienced on the surface. Watches for space missions must be resistant to radiation and its potential effects on timekeeping accuracy and reliability.

Mechanical watches, with their intricate movements and lack of reliance on batteries, have proven their worth in space. The absence of battery dependence eliminates the risk of power failure, making them a reliable choice for timekeeping in prolonged space missions. Mechanical watches also possess a timeless charm and craftsmanship that resonates with the tradition and spirit of exploration.

FAQ Section

Why do astronauts wear watches on the inside of their wrists?

Wearing watches on the inside of the wrist is a practice adopted by astronauts to improve readability. In the microgravity environment of space, where there is no concept of “up” or “down,” astronauts can easily orient their wrists towards their faces to read the time.

Can any watch be used in space?

Not all watches are suitable for space travel. Watches destined for space missions must undergo rigorous testing and meet specific criteria set by space agencies like NASA. These watches must demonstrate their ability to withstand the extreme conditions of space, including temperature variations, vacuum, and radiation.

How does zero gravity affect a wristwatch?

In zero gravity, the functioning of a wristwatch is not affected by the absence of gravity itself. However, the lack of gravity does impact how astronauts perceive time. Without the natural cues provided by gravity, astronauts rely on their watches to maintain a sense of time and coordinate their activities.


In the vastness of space, where time is an essential factor in mission success, astronauts rely on watches that have been rigorously tested and proven to withstand the extreme conditions of their environment. From the historical significance of the Sturmanskie and the Breitling Navitimer to the iconic status of the Omega Speedmaster, watches have played a vital role in space exploration.

Today, astronauts have a range of choices when it comes to selecting their timekeeping companion. From mechanical watches like the Fortis Official Cosmonauts Chronograph and Sinn 140/142 Space Chronograph to digital options like the G-Shock DW5600E-1V and even smartwatches like the Samsung Gear 2 and Apple Watch, each choice brings its own unique set of features and capabilities.

As technology continues to advance, watches will continue to evolve, adapting to the demands of space exploration. Whether it’s the precision and reliability of mechanical watches or the advanced functionalities of smartwatches, the watches worn by astronauts serve as more than just timekeeping devices; they are symbols of human ingenuity and the indomitable spirit of exploration.

Sherry's editorial journey seamlessly merges with her passion for horology at WatchReflect. As a seasoned editor and watch enthusiast, she curates insightful guides that cater to novices and connoisseurs alike. With a penchant for research and a flair for storytelling, Sherry transforms horological complexities into engaging narratives. Her mission is to illuminate the path for those navigating the multifaceted realm of timekeeping.

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