Starship Atmospheric Flight Test ( Wikipedia )

1. Launch & landing ( subsonic Mach < 0.8 )
2. Launch & landing ( transonic Mach 0.8 - 1.2 )
3. Supersonic Flight ( Mach 1 - 5 )
4. Hypersonic / Orbital reentry ( Mach 10 - 25 )
5. Aero breaking / Aero capture ( Cislunar energies )
6. Aero breaking / Aero capture ( Deep Space energies )

The historical examples of flight programs like this are :

1. Bell X - 1 ( Wikipedia )
2. X - 15 ( Wikipedia )
3. SR -71 ( Wikipedia )
4. Space Shuttle ( Wikipedia )

It is important to remember that none of these systems provided the routine reliable reusability envisioned for Starship.

The Starship has much uncharted territory to cover with many more successes and failures over many years before it can deliver the missions Elon has set for it.

Interplanetary Atmospheric Operations

1. EDL ( Entry, Decent & Landing ) ( Wikipedia )
2. Aerocapture ( Wikipedia )
3. Aerobraking ( Wikipedia )

21st Century Interplanetary TPS ( Thermal Protection System )