5 ms·
Mostly because no one has found a modified version of gravity that can explain all of the observed data. https://royalsocietypublishing.org/doi/abs/10.1098/rst
by zehaeva 5y ago
Mostly because no one has found a modified version of gravity that can explain all of the observed data.
https://royalsocietypublishing.org/doi/abs/10.1098/rsta.2011.0292 https://royalsocietypublishing.org/doi/abs/10.1098/rsta.2011...
- kloch 5y agoWhy not both? Part of why dark matter is such an attractive explanation is because there are no constraints on it. Unfortunately this seems to have relieved pressure to explore and test modified gravity.
- xadhominemx 5y agoWhat do you mean there are “no constraints” on dark matter. There are plenty of constraints. I think you just have no idea what you are talking about.
- kloch 5y agoFor example, how much of it there can be or where it comes from. Contrast with Neutrinos. But you are correct, I don't know what I am talking about which is why my comments were phrased in the form of a question or literally with the words "I don't understand"
- nitrogen 5y agohow much of it there can be Something like this? https://chandra.harvard.edu/xray_astro/dark_energy/chart.jpg https://chandra.harvard.edu/xray_astro/dark_energy/chart.jpg
- kloch 5y agoIs that a chart of how much we think there is (model fitting based on observations) or how much we think there should be based on how it is created? With Neutrinos we know how they are created and have a very good upper limit on how much there should be and it's not nearly enough to explain the observed effects. Same for the CMBR. I'm not saying there couldn't be much more Dark matter/energy than neutrinos or photons but it's a bit too convenient to introduce a variable that is allowed to take any value and match it to observations without an explanation of what it is (besides having mass) or how it is created.
- nostrebored 5y agoCalculations involving dark matter might as well be an experiment in curve fitting. We won’t find dark matter in your or my lifetime, because it doesn’t exist. It is a convenient, flexible, and inelegant fudge factor.
- xadhominemx 5y agoNo, not really. We can observe it indirectly and have mapped out its structures. And intuitively, why do you find it implausible there is a massive particle that only interacts via gravitational force?
- TuLithu 5y agoA "kludge," if you will?
- leereeves 5y agoI think they mean that the theory of dark matter has an infinity of parameters. For every point in space, one can (rather arbitrarily) assign a mass of dark matter to make the theory fit observations.