4 ms·

The problem is gravity also affects particles with no mass

• knorker 4y ago
  With no rest mass. But you can create a black hole by putting enough photons in one place.
  • spixy 4y ago
    Can I? :)
    • knorker 4y ago
      You have my permission. Just as long as it's Not In My Back Yard.
      • kazinator 4y ago
        The high density accommodation of matter brought in by a black hole would spoil the character of our neighborhood.