Inertial Upper Stage

Rarity: Common

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At a glance

Class

Invention

Domain

Science and technology

Knowledge cost

4

In collections

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What Wikipedia says

The Inertial Upper Stage (IUS), originally designated the Interim Upper Stage, was a two-stage, solid-fueled space launch system developed by Boeing for the United States Air Force beginning in 1976 for raising payloads from low Earth orbit to higher orbits or interplanetary trajectories following launch aboard a Titan 34D or Titan IV rocket as its upper stage, or from the payload bay of the Space Shuttle as a space tug.

Excerpt from the Wikipedia article “Inertial Upper Stage”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: NASA, Public domain, via Wikimedia Commons.