Last mentioned: Mar 18, 2026
Ed White performs a 23-minute EVA during the Gemini 4 mission.
Svetlana Savitskaya becomes the first woman to perform an EVA.
SpaceX Polaris Dawn crew conducts the first private sector EVA.
First Human Spacewalk
Alexei Leonov exits Voskhod 2 for 12 minutes.
The anniversary of Alexei Leonov's historic 1965 spacewalk highlights the evolution of extravehicular activity from a high-stakes Cold War gamble to a critical capability for modern orbital infrastructure and defense. This milestone established the technical foundations for satellite servicing and long-term human presence in the space domain.
This page surfaces every story mentioning Soviet Union across our space & defense coverage. We track each entity's appearance over time so readers can trace how the narrative evolves — which developments are isolated incidents, which build into longer arcs, and which reframe how operators in the space think about the entity. Story selection uses the same multi-source verification gate applied across the rest of our coverage.
Read our editorial methodology for how we identify, deduplicate, and score entity references. Our glossary defines the technical terms used across stories on this page, and our trends index contextualizes individual developments against the longer-running space & defense beat. Cross-entity comparisons live on our compare view.
| What you see | What it tells you |
|---|---|
| Story count | Number of distinct stories where Soviet Union was a primary or referenced actor. |
| Recency clustering | Whether mentions are concentrated in a recent window (a news cycle) or distributed (a sustained arc). |
| Sentiment distribution | Aggregate sentiment of the stories mentioning this entity, weighted by impact score. |
| Cross-niche links | When the same entity surfaces in our sibling networks, we link to those views to enrich context. |