venusenvy47
2 hours ago
Would a primordial black hole have a small accretion disk? If so, it seems like that disk would give off radiation.
A wobble from Mars could be sign of dark matter
10 pointsposted 13 hours ago
by wglb4 Comments
_rm
2 hours ago
"Dark matter" sounds a lot like "we've run out of ideas so we're going back in the direction of 'the ether' and chariots pulling the sun across the sky and the like".
smolder
15 minutes ago
Dark matter is an observed discrepancy between measurements. There appears to be a lot of unaccounted-for mass based on many experimental results. There are several theories of what that observed discrepancy could be caused by. This is a well-covered topic, anywhere you could hope to learn about astrophysics. What it may sound like to you is not what it is.
MathMonkeyMan
an hour ago
There are a bunch of good reasons to believe there really is matter there that we can't detect aside from its gravity. Here's a talk: <https://www.youtube.com/watch?v=h8KV9Ht5o_M>.