black-hole
Sagittarius A*
How big is Sagittarius A*?
About 4.15 million times the mass of the Sun, packed into a region smaller than Mercury's orbit.
Is Sagittarius A* dangerous to Earth?
No — it is 26,000 light-years away and its gravity does not reach us.
Explore more
Learn the Science: Read our complete educational breakdown on Coronal Holes.Historical Archive: Track past occurrences of this cosmic phenomenon.Live Telemetry: Jump to the real-time Kp index & solar wind command matrix.
🌌 Broader Cosmic Context
🪐 Related Space Phenomena & Objects
- Space Weather Tracker — Home DashboardLive global overview
- Live Space Weather Command DashboardReal-time metrics
- Space Weather 101 — The Complete Beginner's GuideLearn the science