Table of Contents
- 1 Why do scientists think there is dark matter in the universe?
- 2 How does MOND relate to dark matter?
- 3 Does MOND explain gravitational lensing?
- 4 Why do we need modified gravity?
- 5 What is modified Newtonian dynamics theory?
- 6 Does the Mond model support the dark matter hypothesis?
- 7 Can Modified Newtonian dynamics explain the orbital behavior of galaxies?
Why do scientists think there is dark matter in the universe?
It doesn’t interact with baryonic matter and it’s completely invisible to light and other forms of electromagnetic radiation, making dark matter impossible to detect with current instruments. But scientists are confident it exists because of the gravitational effects it appears to have on galaxies and galaxy clusters.
How does MOND relate to dark matter?
Since MOND modifies Newtonian dynamics in an acceleration-dependent way, it predicts a specific relationship between the acceleration of a star at any radius from the centre of a galaxy and the amount of unseen (dark matter) mass within that radius that would be inferred in a Newtonian analysis.
Why is MOND still considered valid?
MOND makes unique predictions about the relation between the mass distribution and kinematics. These predictions are confirmed with surprising accuracy in the observed rotation curves of observed galaxies, a phenomenon which is exceptionally well established observationally (Sanders & McGaugh 2002).
Does MOND explain gravitational lensing?
Modified Newtonian dynamics (MOND) is an alternative theory of gravity that aims to explain large-scale dynamics without recourse to any form of dark matter. However, the theory is incomplete, lacking a relativistic counterpart, and so makes no definite predictions about gravitational lensing.
Why do we need modified gravity?
While most astronomers believe that dark matter exists, some still think that we need to modify our theory of gravity. However, new research has found a critical flaw in modified gravity theories: They allow for effects to occur without causes and for information to travel faster than the speed of light.
Is dark matter chaotic?
These strange attractors provide that the dynamics of coupling interactions between dark energy, dark matter and matter is chaotic.
What is modified Newtonian dynamics theory?
Modified Newtonian dynamics. Modified Newtonian dynamics (MOND) is a theory that proposes a modification of Newton’s laws to account for observed properties of galaxies. It is an alternative to the theory of dark matter in terms of explaining why galaxies do not appear to obey the currently understood laws of physics.
Does the Mond model support the dark matter hypothesis?
In particular, MOND predicts a far stronger correlation between features in the baryonic mass distribution and features in the rotation curve than does the dark matter hypothesis (since dark matter dominates the galaxy’s mass budget and is conventionally assumed not to closely track the distribution of baryons).
Are MOND and dark matter/energy the same thing?
A good bet would be that there are several, as yet undiscovered and not yet understood principles operating in the univers. That MOND and dark matter/energy seem at odds should not indicate one is correct and the other not. It may be two expressions of the same effect.
Can Modified Newtonian dynamics explain the orbital behavior of galaxies?
Some astronomers believe the orbital behavior of galaxies can be explained more accurately with Modified Newtonian Dynamics (MOND) — a modified version of Newton’s Second Law — than by the rival, but more widely accepted, theory of dark matter.