# @gravitonomy on Instagram

- **Type:** Image
- **Original URL:** https://www.instagram.com/p/DUx1sgKEVHo
- **Gondola URL:** https://gondola.cc/posts/61873926-gravitonomy-instagram
- **Thumbnail:** https://img.gondola.cc/tr:w-,h-,fo-auto/postThumbnails/d3bdb6a25a.jpg
- **Posted:** 2026-02-15T12:34:36.000+00:00
- **Account Owner:** Gravitonomy (@gravitonomy) — https://gondola.cc/gravitonomy

## Caption

Bruce McCandless II used the Manned Maneuvering Unit, a backpack with high pressure nitrogen thrusters that produce controlled forces using Newton’s third law. Hand controllers fired small jets to translate and rotate in microgravity with precise momentum control. The system had redundant valves, gyros, and stabilization electronics to maintain orientation. To return, he gently pulsed thrusters to match velocity with the shuttle and approach slowly, where astronauts captured him. The design relied on conservation of momentum, careful fuel budgeting, and real time human control.

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#spacewalk #space #astronomy #science #physics

## Stats

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- **Likes:** 229
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- **Comments:** 4

## Tags

science, space, spacewalk, physics, astronomy

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