ERHC Energy Inc (ERHE)

[Julius Erving]

Shorters are like black holes:

How do we know that black holes exist if we Cannot see them?

The gravitational field of a black hole tugs on the stars in its vicinity. A super-massive black hole will make whole swarms of stars whip around as they fall under its influence. By following the motions of the orbiting stars, astronomers can deduce the location, and size, of the central black hole they cannot see.

Hope this helps.