When people think of NASA, they usually picture astronauts, rockets, and outer space. But did you know NASA once explored the ocean too? It’s true! For a time, NASA was involved in ocean research. This has led many to ask, “Why did NASA stop exploring the ocean?” The answer is both fascinating and simple. Let’s dive in to understand the history, reasons, and possibilities behind this shift.
What Was NASA Doing in the Ocean?
NASA, or the National Aeronautics and Space Administration, is famous for space exploration. But during the 1960s and 1970s, they took an interest in Earth’s oceans. Their oceanic missions were connected to their desire to understand our planet better.
One reason for NASA’s interest in the ocean was the similarity between conditions in the deep ocean and outer space. The pressure, darkness, and unknown creatures of the ocean are almost as mysterious as what we find in space. NASA even tested some of their technologies for space exploration underwater because it provided an extreme environment to simulate space-like conditions.
Another reason was Earth’s climate. NASA studied how oceans interact with the atmosphere, influence weather, and affect global temperatures. Understanding ocean currents, water temperatures, and marine life was critical to understanding Earth’s ecosystem as a whole. Yet, despite these efforts, NASA eventually shifted its focus entirely to space. Why? Let’s find out.
Why Did NASA Stop Exploring the Ocean?
NASA stopped exploring the ocean for a simple reason: it wasn’t their primary mission. NASA was created in 1958 to lead space exploration for the United States. Studying the ocean, while fascinating and important, wasn’t part of their core mission. Over time, they realized they needed to focus their resources and expertise on their primary goal—outer space.
Another reason is funding. NASA’s budget is limited, and ocean research can be expensive. The government and scientists decided it would be better for specialized ocean agencies, like NOAA (National Oceanic and Atmospheric Administration), to focus on ocean exploration instead.
It’s also important to note that by the 1980s, NASA’s focus shifted toward big space projects like the Space Shuttle program, the International Space Station, and deep space exploration. With such massive goals, it made sense for NASA to leave ocean research to experts in marine science.
What Makes the Ocean So Mysterious?
The ocean covers more than 70% of Earth’s surface, yet much of it remains a mystery. Scientists estimate that over 80% of the ocean is still unexplored. Why is it so difficult to explore the ocean, and what makes it such a mystery? Let’s explore a few reasons below.

The Deep Ocean Is Hard to Explore
The deep ocean is one of the most extreme environments on Earth. As you dive deeper, the pressure increases drastically. At the bottom of the ocean, the pressure is so intense that it can crush even the toughest submarines. It’s also completely dark because sunlight doesn’t reach those depths. This makes it incredibly challenging to send people or even machines to explore.
We Know More About Space Than the Ocean
It may surprise you to learn that we know more about the surface of the Moon and Mars than the bottom of the ocean. Thanks to satellites and telescopes, we’ve mapped nearly all of the Moon’s surface. But the ocean floor? We’ve only mapped about 20% of it. This makes the ocean one of the least explored frontiers on Earth.
Creatures from the Deep Sea
The deep sea is home to some of the most bizarre and fascinating creatures on the planet. From bioluminescent jellyfish to anglerfish with glowing lures, these animals look like they belong in a science fiction movie. Because these creatures live so deep, we rarely get to see them. Every time scientists explore the deep ocean, they discover new species, adding to the ocean’s mystery.
Is Anyone Still Exploring the Ocean?
Although NASA has shifted its focus to space, ocean exploration hasn’t stopped. Organizations like NOAA, along with universities and private companies, continue to study the ocean. They use advanced technologies like robotic submarines, underwater drones, and deep-sea sensors to explore the vast unknown.
One of the most exciting developments is the growing use of autonomous underwater vehicles (AUVs). These robotic explorers can dive to the ocean floor and send back data and images without needing a human crew. Companies like OceanX and Schmidt Ocean Institute are also helping to advance ocean research by funding expeditions and developing new tools.
Why NASA Focuses on Space Instead
NASA’s main mission is to explore space and study our universe. But why is space exploration so important? For one, space offers us answers to some of the biggest questions about our existence: How did the universe form? Are there other planets that could support life? What’s out there beyond our solar system?
Space exploration also has practical benefits. Technologies developed for space missions, like GPS, weather satellites, and even water purification systems, have improved life on Earth. By focusing on space, NASA has been able to drive innovation and inspire future generations.
Another factor is the global interest in space exploration. Space missions bring countries together, create new industries, and fuel scientific breakthroughs. For NASA, the opportunities in space are endless, while ocean exploration is better left to other organizations.
Can NASA Go Back to Exploring the Ocean?
Could NASA ever return to ocean exploration? The answer is yes, but it’s unlikely to happen anytime soon. NASA’s current priorities are focused on space missions like returning to the Moon (Artemis program), exploring Mars, and searching for life on other planets. However, NASA hasn’t completely abandoned the ocean.

NASA’s Current Ocean Projects
Even though NASA doesn’t explore the deep ocean directly, they’re still involved in ocean-related research. For example, NASA studies how oceans impact the global climate. Their satellites monitor sea level rise, ocean temperatures, and changes in polar ice. These studies are crucial for understanding climate change and protecting our planet.
Collaboration with Ocean Researchers
NASA also collaborates with ocean researchers and organizations like NOAA. Together, they share data and technologies to improve our understanding of Earth’s oceans. For example, NASA has shared satellite data with oceanographers to map currents and track marine ecosystems.
Could New Technologies Help?
Advancements in technology could make ocean exploration easier and more affordable. With better robotics, AI, and underwater sensors, it’s possible that NASA or other organizations could explore the ocean more deeply in the future. Technologies developed for space exploration often have applications on Earth, so the tools NASA creates for space missions might one day be used to explore the ocean.
How Much of the Ocean Is Still Unexplored?
Despite centuries of exploration, more than 80% of the ocean remains unexplored. Most of this unexplored area lies in the deep sea, which is incredibly difficult to access. Scientists believe there are thousands, if not millions, of undiscovered species waiting to be found. There are also underwater mountains, volcanoes, and trenches that have yet to be fully mapped.
One of the biggest mysteries is the Mariana Trench, the deepest part of the ocean. Even though we’ve sent a few expeditions there, much of it remains unknown. The potential for new discoveries is enormous, which is why ocean exploration remains an exciting field for scientists.
The Bottom Line
So, why did NASA stop exploring the ocean? The simple answer is that NASA’s primary mission is space exploration, and they decided to focus their efforts on the stars instead of the seas. While the ocean is full of mysteries, NASA’s expertise and resources are better suited for exploring the vastness of space.
That doesn’t mean the ocean has been forgotten. Organizations like NOAA and private companies are still working hard to uncover the secrets of the deep. And with new technologies emerging, we may soon know more about the 80% of the ocean that’s still unexplored. Whether it’s the ocean or outer space, the spirit of exploration continues to inspire us to discover the unknown.