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Science & Space

Can sound travel through the vacuum of space?

Published

Verdict
False
Verification confidenceHigh

Explanation

No. Sound cannot travel through a vacuum because it needs a material medium, such as air, water or a solid, to transmit vibrations.

NASA distinguishes mechanical waves, including sound, from electromagnetic waves. The latter can cross a vacuum. ESA likewise explains that sound cannot travel through the vacuum of space, although spacecraft interiors can be noisy.

The distinction is between a vacuum and places containing matter. Sound inside an air-filled spacecraft does not contradict the rule, and a radio signal crossing space is not a sound wave travelling through that vacuum.

Key takeaway

Sound needs a material medium. Electromagnetic waves, including radio, do not.

Evidence

Sound requires a material medium

NASA

Contradicts the claim

NASA explains that sound is a mechanical wave and cannot propagate through a vacuum without a medium.

Based on: NASA

Spacecraft interiors differ from the surrounding vacuum

European Space Agency

Contradicts the claim

ESA states that sound cannot travel through the vacuum of space, while noting that spacecraft interiors can be loud.

Based on: European Space Agency

Radio waves are electromagnetic waves

NASA

Provides context

Electromagnetic waves can propagate through a vacuum, explaining why radio transmission does not require sound to cross empty space.

Based on: NASA

Sources

NASA

Anatomy of an Electromagnetic Wave

European Space Agency

How loud is space?

Apr 3, 2020

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