Is there really a singularity in a black hole?
The singularity at the center of a black hole is the ultimate no man’s land: a place where matter is compressed down to an infinitely tiny point, and all conceptions of time and space completely break down. And it doesn’t really exist. Something has to replace the singularity, but we’re not exactly sure what.
What are singularities in space?
A singularity is a region of space where the curvature of spacetime becomes infinite. Singularities are regions of space where the density of matter, or the curvature of spacetime, becomes infinite. In such locales, the standard concepts of space and time cease to have any meaning.
Why is the universe believed to be expanding?
Astronomers theorize that the faster expansion rate is due to a mysterious, dark force that is pulling galaxies apart. One explanation for dark energy is that it is a property of space. As a result, this form of energy would cause the universe to expand faster and faster.
Is there singularity in universe?
Singularities can happen anywhere, and they are surprisingly common in the mathematics that physicists use to understand the universe. The most famous are gravitational singularities, the infinities that appear in Einstein’s general relativity (GR), which is currently our best theory of how gravity works.
Where did the gravitational singularity come from?
Singularities form by a collapse of a star, where star with high enough mass (above 30 times the sun) would shrink under its own gravity and force until it becomes a single, one dimensional point. When it forms, space and time would be infinite in there.
What is a spacetime singularity and why is it important?
A spacetime singularity is a breakdown in spacetime, either in its geometry or in some other basic physical structure. It is a topic of ongoing physical and philosophical research to clarify both the nature and significance of such pathologies.
Is the universe expanding or expanding?
It’s just expanding. All of the galaxies in the universe are moving away from each other, and every region of space is being stretched, but there’s no center they’re expanding from and no outer edge to expand into anything else. But that doesn’t mean that the universe is infinite. That brings us to the long answer.
Do we need to understand the ontology of singularities?
Our current theory of spacetime, general relativity, not only allows for singularities, but tells us that they are unavoidable in some real-world circumstances. Thus we apparently need to understand the ontology of singularities if we are to grasp the nature of space and time in the actual universe.
What is the theory of space-time?
According to the best of current physical theories, space-time explains the unusual relativistic effects that arise from traveling near the speed of light as well as the motion of massive objects in the universe. Who discovered space-time?