- A secretive Russian satellite broke apart in Earth's orbit, the US Space Force said on Monday.
- Kosmos 2499 launched secretly and made "suspicious" maneuvers to complete a mysterious mission.
- The satellite's possible explosion-induced debris field could last a century, according to NASA.
A mysterious Russian satellite with a shady mission has broken apart in Earth's orbit, creating a hazardous cloud of debris zipping around the planet and menacing other satellites, US Space Force announced.