Starship Asterisk*

The spiral arms around galaxies flow into the center indicating they are being drawn in by a force. Laws of physics dictate that objects will accelerate as they get closer to the center of mass. If objects were at constant speed they would merely orbit as do the rings around Saturn or the planets ar...

That is what Neil claims but it does not make sense in the nature of physics.

I'm new to doing this so please bare with me. A recent COSMOS show was a discussion on dark matter and energy. Neil said the stars on the outer rings of a galaxy move at the same speed as those near the center due to the presents of dark matter. I disagree because for a galaxy to be and look as it d...