Unraveling the Mysteries of Gravity: From Newton to Black Holes

Newton's Law of Universal Gravitation

What is Gravity?

Sir Isaac Newton described gravity as a force of attraction between all objects. This force is proportional to the masses of the interacting bodies. The more massive the objects, the stronger the gravitational pull between them.

The Moon's Rotation

. How is it that gravity is so weak yet so influential? Although gravity it is considered to be the weakest force of nature, it may be weak here on Earth, but it's not so weak across the cosmos. This invisible force varies on all the planets in the solar system and on the exoplanets we've discovered orbiting other suns. And that's because gravity is an additive force. It scales with mass, so the more massive the planet or star, the stronger its gravity. In a neutron star the amount of matter that is in our sun fits into a 20 Km sphere, how can that be physically possible? As a the neutron star spins, some parts of particles stream out from the poles at almost the speed of light. These particle parts create powerful beams that swipe around as the star rotates. When these beams swipe across the earth, they can be heard as regular pauses. Where was Newton's theory proved wrong? When they tried to calculate Mercury's orbit very precisely using only Newton's laws of gravity. Astronomers used to predict the exact time when you could look up into the sky, look at the sun and see the tiny disc of Mercury pass across its face. They never got it right, and although they predicted it time and time again, and every time it happened they got it slightly wrong, which was an immense embarrassment. Who replaced Newton’s theory and with what did they replace it? Albert Einstein, with a new theory called General Relativity, which explains to this day everything we can see in the universe that has anything to do with gravity. Where does this theory breakdown? Because it predicts the existence of objects so dense and so powerful that they warp and stretch and bend the structure of space-time so much that they can stop time and that they can swallow light. There are objects so powerful that they can tear all the other wonders of the universe apart, and from what we know they don’t exist. What is an event horizon? It’s when space is flowing at the speed of light into a black hole, an this is because if we get close to a black hole space flows faster and faster towards the black hole.