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This image of the black hole at the center of the nearby galaxy M87 reveals how gravitation affects the matter in orbit and the light that material emits, providing a novel test of general relativity in a regime where gravity is very strong.
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Alberto Accomazzi. Center for Astrophysics. Principal...
- Cosmology
What is the universe made of? How did it begin? How has it...
- Connecting the Dots
Two-and-a-half trillion pages of printed text — that's how...
- Gravitational Waves
The newest branch of astronomy doesn’t rely on light....
- Gravitational Lensing
The images made by strong lensing can also tell us about the...
- Very Long Baseline Interferometry
What if we could build a telescope the size of Earth? That’s...
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A very massive object — such as a gal- axy cluster — can act as a gravitational lens. Some images of regions around gal- axy clusters show numerous arcs. Those are background galaxies distorted...
The force of gravity is an attractive force that is proportional to the product of the masses of the interacting objects, and inversely proportional to the square of the distance between them. A gravitational interaction involves the attractive force that any object with mass exerts on any other object with mass.
• Einstein’s theory of Gravity • Uncertainty Principle and Virtual Particles • Gravitational and Cosmological Red Shifts – Observational Aspects • The wave nature of light and limitations that this imposes on optical instruments.
what is gravity and how does it work? This engaging book delves into the bizarre and often counter-in. uitive world of gravitational physics. Join distinguished astrophysicist Professor Luciano Rezzolla on this virtual journey into Einstein’s world of gravity, with each milestone presenting ever m.
2 mar 2016 · Essentials. Isaac Newton described the effects of gravity, but didn’t propose a mechanism for how it worked. Albert Einstein proposed that massive objects warp and curve the universe, resulting in other objects moving on or orbiting along those curves—and that this is what we experience as gravity.
A galaxy is a huge collection of stars and interstellar matter isolated in space and bound together by gravity. There are thought to be over 100 billion galaxies in the Universe, mainly residing in clusters and groups. The most well known galaxy is our own Milky Way –and indeed, the term galaxy comes from the Greek word ‘gala’, which means ‘milk’.
