Reentry

When a spacecraft returns from the Moon, it strikes Earth’s atmosphere at around 25,000 miles per hour. The air in front of it compresses into a glowing plasma sheath hotter than molten lava, and the vehicle effectively becomes a fireball for several minutes. A reasonable question follows - why not just slow down first? Why not fire engines to drop down to something more manageable, like the ~17,500 mph of low Earth orbit, and skip the inferno entirely? ...