Lance Lewman

Narrator

Holly Gilbert

Herself - NASA Goddard Space Flight Center

Bill Murtagh

Himself - National Oceanic and Atmospheric Administration Space Weather Center

Jim Green

Himself - NASA Planetary Science

Todd Hoeksema

Himself - Stanford University

Sarah Gibson

Herself - National Center for Atmospheric Research, High Altitude Observatory

Scott McIntosh

Himself - National Center for Atmospheric Research, High Altitude Observatory

Karel Schrjiver

Himself - Lockheed Martin

W. Dean Pesnell

Himself - NASA Goddard Space Flight Center