NASA has made an intriguing discovery on the moon—a cave where astronauts can stroll without the need for spacesuits, comfortably dressed in pants and a sweater.

A remarkable find has been made by a NASA orbiter—an unusual cave has been discovered on the moon.

NASA discovered a cave on the moon where a spacesuit is not needed, here you can walk in pants and a sweater

NASA discovered a cave on the moon where a spacesuit is not needed; one can walk inside wearing pants and a sweater.

These deep passages, leading from the lunar surface, form an extensive network of catacombs. They are spacious enough to potentially accommodate an entire city.

NASA discovered a cave on the moon where a spacesuit is not needed, here you can walk in pants and a sweater

What sets these caves apart is their distinct climate. It is believed that a spacesuit is not required within the caves, and individuals can comfortably walk around dressed in ordinary pants and a sweater. Unlike the moon’s surface, which experiences extreme temperatures ranging from +130 to -173 degrees Celsius, the catacombs maintain a constant temperature of around +17 degrees Celsius.

It appears that these caves were formed from lava tubes, created during volcanic eruptions. Notably, the dimensions of the discovered cave are astounding. Stretching over 50 kilometers, with a ceiling height exceeding 75 meters, this lava tube—assuming it is one—is a remarkable structure.

NASA discovered a cave on the moon where a spacesuit is not needed, here you can walk in pants and a sweater

Remarkably, these lunar catacombs hold the distinction of being the oldest known on Earth’s satellite, having formed at least 3.5 billion years ago.

“This is not merely a location for a temporary base. The catacombs are large enough to accommodate an entire city. Some astrophysicists even joke that it might already exist,” shared Dr. Honshu Kaguya, one of the researchers involved in this discovery, during a press briefing.

American astronauts are planning to explore these caves in the near future, with a new lunar mission anticipated to take place by the end of the 2030s.

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