Here in our universe, both normal and dark matter can be measured astrophísically. But only normal matter can collapse. Why is that?
Here in our universe, it may be the normal matter that we can directly detect, measure, manipulate, experiment and observe, but it is dark matter that represents most of the dough in the universe. While all “things” that planets, stars, gas, plasma and dust are composed of approximately 4.9% of the total energy in the universe, the mysterious dark matter, whose nature is unknown but for the What is the overwhelming observational astrophysic evidence: it constitutes a huge 27% of the cosmic energy budget. Only dark energy, which represents 68% of the universe, is more important from an energy density perspective.
And yet, dark matter is only found in diffuse halos, never in collapsed groups such as normal matter. Why is that? That is the issue of this week’s question, from Barry Lewis in New Zealand, which he wants to know:
“How does Dark import, while it is gravitational, not collapses? I cannot think of any discussion that I have found to address this apparent need to experience some kind of mutual repulsive force. “
#Ethan #Dark #matter #collapse #due #gravity #Ethan #Siegel #Start #explosion #February
