It was discovered that the speed of light was the same in all directions. It was observed that the times which the moons of Jupiter pass behind Jupiter were not evenly space. The speed of light was first discovered in 1676. That which states, every body attracts every other body with a force that is proportional to the mass of the body (we are pulling the Earth up technically) Timeīoth Newton and Aristotle believed in absolute time – that is one could unambiguously measure the time between events.This works well when dealing with normal things, but they don’t work when you move things near the speed of light. Newton came up with the 3 laws of motion, but also came up with a law to describe the force of gravity. Whenever a body Is not acted on by a force, it will continue in a straight line by the same speed. Newton came out with Principia Mathematica in 1687.

Galileo’s experiments were used by Newton to develop the laws of motion The situation is similar to that of heavy bodies falling vertically, but it is easier to observe because speeds are slower – like if holding a feather and a billiard ball on the moon. If you let go 2 balls on a slope with different weights, they will go down at the same time. Galileo’s measurements indicated that each body increased its speed at the same rate, no matter the weight.

SPACE, TIMEīefore Galileo and Newton, the motion of bodies were assumed to be at rest unless acted upon. In this episode we’ll talk about Space and Time, Black Holes, The Expanding Universe and the Universe and Meaning. It is a book for readers who have no knowledge of the universe and are curious to learn more about science. A Brief History of time is a popular science book on cosmology written by Stephen Hawking.

A history of time