Hot Jupiters are gas giants orbiting very close to host stars; they likely formed beyond snow line and migrated inward via _______.
- Disk migration or tidal interactions
- Core accretion in situ
- Gravitational instability
- Stellar capture
Answer: Disk migration or tidal interactions
Type I/II disk migration or high-eccentricity tidal circularization explains hot Jupiter presence interior to snow line where gas giant formation is unlikely.