Is it viable to use vacuum instead of helium? | Hacker News

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bloopernova on Jan 21, 2024 | parent | context | favorite | on: NASA regains contact with mini-helicopter on Mars

Is it viable to use vacuum instead of helium?

nilsherzig on Jan 21, 2024 | [–]

Wouldn't you need something with some amount of pressure to stop the "shell" you plan to float from collapsing?

anticensor on Jan 22, 2024 | [–]

What if we use hydrogen, which is halfway between helium and vacuum?

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