[Lord Felix]

Dracus bloviates:
If you don't have a planet (IE earth crushed) then the sats would be pulled in, because
then there would be no orbit. orbits are based on speed ver grav. That is why we have
to push our sats back up, because in time, grav overpowers them. All the planets are
slowly being pulled toward the sun. It will take billions of years but in time the earth
will crash into our sun. Take a science math course or read a steven Hawken book. It
is all explained there.

Lord Felix, a member of the American Academy for the Advancement of Science, responds:
Nope, that's all nonsense. Satellites would orbit an earth-mass blackhole EXACTLY the way they would orbit the Earth. In an idealized system including NOTHING but the Earth and the Moon in orbit, the orbit would remain unchanged forever. In reality, due to the slow attraction of the rest of the universe, the Moon is actually RECEDING from the Earth and it will NEVER fall in as you say! In the dinosaur age, the Moon was visibly larger in the sky, not smaller. Small human satellites slowly fall, and must be boosted up to maintain orbital altitude, due to the slowing effect of friction (they bump into millions of air molecules). Your post is remarkable for being incorrect in every single detail, including the spelling of Hawking's name! It's a bad idea to be arrogantly dismissive when all your facts are wrong!