Back to Article List From the December 2007 issue How do gravity assists work? Alex Forbes, Castro Valley, California By Astronomy Staff | Published: December 1, 2007 | Last updated on May 18, 2023 By passing near a large body, a spacecraft can radically alter its speed and trajectory without expending any fuel. This may sound like a free lunch, but it isn’t.
Astronomy for beginners, Astrophotography, Observing Basics, Solar System Beginner’s guide: How to photograph comets
Robotic Spaceflight, Solar System ESA’s Hera mission is headed to Dimorphos, the asteroid NASA crashed into