This week in SF history— 2 January 2004: Stardust flies past Wild 2 (wikipedia.org) — Whipple shielding (wikipedia.org)Spaceflight news— Chang’e 4 pre-landing summary (spacenews.com)Short & Sweet— SpaceX on schedule for its first commercial interplanetary launch. (teslarati.com)— India to launch its own astronauts. (indiatimes.com)— Crewed Orion spacecraft passes critical design review. (nasaspaceflight.com)Questions, comments, corrections— Peter via email: cosmic background radiation is only in the microwave spectrum