Johannes Kepler's theories of the universe were notable for hypothesizing that the universe was created on April 27, 4977 B.C. and that the planets orbit in an elliptical pattern rather than a circular pattern. His theory superseded previous theories which postulated that planets move in circular orbits at constant speeds.Continue Reading
Kepler based his theories on the ideas of Copernicus, who had previously proposed that the sun, rather than the Earth, was the center of the solar system. Working from this perspective, Kepler began to carefully observe the motion of the planets, particularly Mars. After obtaining a telescope from Galileo Galilei and improving its design, he realized that the orbit of Mars did not fit into a circular pattern. From this observation, he began to formulate his theory that the planets moved in ellipses rather than circles.
This theory led to his later theories of planetary motion, which stated that the speed of a planet's motion is determined by its distance from the sun. Although his theory about the origin of the universe has been discredited by modern astronomy, his laws of planetary motion have proven widely influential in the development of later scientific theories, including Isaac Newton's law of gravity.Learn more about Universe
The type of information about space that is interesting to children includes the number and nature of the planets, the different objects in the universe and the size and nature of the sun. Children find it fascinating to learn that the sun is actually a star that sits at the centre of the solar system. The sun's diameter is 110 times bigger than the earth's and that the sun alone makes up over 99 percent of the solar system's mass.Full Answer >
As of 2014, the universe is believed to be flat, according to the inflationary theory. This theory has to do with the density of the universe and suggests that the universe must be flat as piece of paper.Full Answer >
The no boundary theory of the universe likens the universe to the Earth, in that is impossible to find any boundaries traveling around the Earth or to fall off it. This is possible as a result of theorizing that prior to the Big Bang, the generally accepted laws of physics did not apply and that the concept of time as we know it did not exist.Full Answer >
The nebular theory of solar system formation suggests that stars and their planets form out of cooling interstellar clouds of molecular hydrogen. As the cloud contracts, it forms a disc of dense material that forms the star. As it forms, the star throws off material that coalesces into planets.Full Answer >