Astronomer Dr. Richard Lieu proposes a new theory that explains gravity without relying on dark matter, a type of invisible matter thought to make up about 27% of the universe. Lieu’s research suggests that gravity can exist without mass, which could revolutionize our understanding of the cosmos.
According to Lieu, extra gravity required for galaxies and clusters to form might come from shell-like structures called topological defects, created during a significant change in matter’s state in the early universe. These cosmic structures are thought to be highly compact regions with high density, often forming linear structures like cosmic strings or spherical shells.
Lieu’s theory proposes that these shells, composed of thin inner and outer layers with zero total mass, can still produce large gravitational forces due to their curvature and interaction with nearby objects. This effect is similar to the bending of light around massive astronomical objects, which can be measured using the orbits of stars.
The proposed shells are massless, meaning they might not require dark matter to explain observed gravitational effects. Future research will explore how galaxies or clusters form from these structures and how they evolve over time. Lieu’s findings suggest that gravity can exist without mass, offering a promising alternative to current understanding of dark matter.
Source: https://www.techexplorist.com/gravity-exist-mass-researcher-shows-first-time/91100/