Proton

Overview

A Russian heavy-lift rocket used to launch interplanetary probes, large satellites, and space-station modules.

Knowledge connections

• Operated byRoscosmos
• Launched fromBaikonur Site 81

Sources

Facts on this topic will be cited from these primary and reference sources.

• NASANational Aeronautics and Space Administration

  Mission data, planetary science, space telescopes, and public-domain imagery.

  Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.