Delta IV Heavy

Overview

A heavy-lift expendable rocket by United Launch Alliance, retired in 2024, used for national-security and high-energy science launches such as Parker Solar Probe.

Knowledge connections

• Operated byUnited Launch Alliance
• LaunchedParker Solar Probe
• Member of familyDelta
• Launched fromSpace Launch Complex 37B
• Powered byRS-68
• Powered byRL10

Sources

The primary and reference sources this topic draws on.

• 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.