4 ms·

The brightness is a function of momentum, meaning, it could be large or it could just be unfathomably fast.

• michpoch 4y ago
  What would create the brightness/light on such impact?
  • jacquesm 4y ago
    Energy dissipation. It's enough energy to temporarily heat the rock and the impactor to the point that they start glowing very brightly.
  • deleted 4y ago
    [deleted]
• hanoz 4y ago
  Why momentum rather than kinetic energy?