Key Space & Defense Terms Explained
Essential terminology you need to understand Space & Defense news. Each term is explained in plain language with context for how it appears in current reporting.
LEO (Low Earth Orbit)
Orbits below 2000 km altitude, used by Starlink and imaging satellites
Space Debris
Non-functional objects in orbit posing collision risks to operational spacecraft
Reusable Launch Vehicle
Rockets designed to land and fly again (e.g., Falcon 9, New Shepard)
Hypersonic
Speeds exceeding Mach 5 — relevant to missiles and experimental aircraft
ITAR
International Traffic in Arms Regulations — US export controls on defense articles
Stay Informed
These terms appear frequently in Space & Defense reporting. Bookmark this page as a quick reference when reading our latest intelligence briefs.
Terms are sourced from stories that clear our classification pipeline at a minimum 35 percent relevance threshold. According to that methodology, reviewed July 2026, this follows multi-source corroboration standards recommended by journalism research bodies such as the Reuters Institute for the Study of Journalism.