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Article

Lensing Effects in Retarded Gravity

by 1,2
1
Department of Electrical Electronic Engineering, Faculty of Engineering, Ariel University, Ariel 40700, Israel
2
Center for Astrophysics, Geophysics, and Space Sciences (AGASS), Ariel University, Ariel 40700, Israel
Academic Editors: Kazuharu Bamba and Maxim Yu. Khlopov
Symmetry 2021, 13(6), 1062; https://doi.org/10.3390/sym13061062
Received: 2 May 2021 / Revised: 28 May 2021 / Accepted: 9 June 2021 / Published: 12 June 2021
(This article belongs to the Special Issue New Advances of Cosmology and Astrophysics)
Galaxies are gigantic physical systems having a typical size of many tens of thousands of light years. Thus, any change at the center of the galaxy will affect the rim only tens of millennia later. Those retardation effects seem to be ignored in present day modelling used to calculate rotational velocities of matter in the outskirts of the galaxy and the surrounding gas. The significant discrepancies between the velocities predicted by Newtonian theory and observed velocities are usually handled by either assuming an unobservable type of matter denoted “dark matter” or by modifying the laws of gravity (MOND as an example). Here, we will show that considering general relativistic effects without neglecting retardation can explain the apparent excess matter leading to gravitational lensing in both galaxies and galaxy clusters. View Full-Text
Keywords: spacetime symmetry; relativity of spacetime; retardation; lensing spacetime symmetry; relativity of spacetime; retardation; lensing
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MDPI and ACS Style

Yahalom, A. Lensing Effects in Retarded Gravity. Symmetry 2021, 13, 1062. https://doi.org/10.3390/sym13061062

AMA Style

Yahalom A. Lensing Effects in Retarded Gravity. Symmetry. 2021; 13(6):1062. https://doi.org/10.3390/sym13061062

Chicago/Turabian Style

Yahalom, Asher. 2021. "Lensing Effects in Retarded Gravity" Symmetry 13, no. 6: 1062. https://doi.org/10.3390/sym13061062

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