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Lecture082802
Lecture082802

... revolution per day Now consider a pendulum at the equator which is swinging along the east-west line This pendulum will not rotate At latitudes in the middle, the pendulum will rotate with a period more than 24 hours ...
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... evening skies. Jupiter will dominate the southwest while Mars and Saturn will reign in the southeast.  Against the background of the constellation Leo, Jupiter is best viewed this month well before midnight, while it is still high in the sky.  Mars reached opposition (opposite the Sun from Earth) ...
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... It will help to build a unified vision of stars It will help to understand the real solar role on the earth climate Understanding all the instabilities, connected to magnetic field, is also useful for terrestrial magnetic fusion (ITER) ...
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... be used to predict future motion. 5-PS2-1. Support an argument that the gravitational force exerted by Earth on objects is directed down. 5-ESS1-1. Support an argument that differences in the apparent brightness of the sun compared to other stars is due to their relative distances from Earth. 5-ESS1 ...
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Formation and evolution of the Solar System



The formation of the Solar System began 4.6 billion years ago with the gravitational collapse of a small part of a giant molecular cloud. Most of the collapsing mass collected in the center, forming the Sun, while the rest flattened into a protoplanetary disk out of which the planets, moons, asteroids, and other small Solar System bodies formed.This widely accepted model, known as the nebular hypothesis, was first developed in the 18th century by Emanuel Swedenborg, Immanuel Kant, and Pierre-Simon Laplace. Its subsequent development has interwoven a variety of scientific disciplines including astronomy, physics, geology, and planetary science. Since the dawn of the space age in the 1950s and the discovery of extrasolar planets in the 1990s, the model has been both challenged and refined to account for new observations.The Solar System has evolved considerably since its initial formation. Many moons have formed from circling discs of gas and dust around their parent planets, while other moons are thought to have formed independently and later been captured by their planets. Still others, such as the Moon, may be the result of giant collisions. Collisions between bodies have occurred continually up to the present day and have been central to the evolution of the Solar System. The positions of the planets often shifted due to gravitational interactions. This planetary migration is now thought to have been responsible for much of the Solar System's early evolution.In roughly 5 billion years, the Sun will cool and expand outward many times its current diameter (becoming a red giant), before casting off its outer layers as a planetary nebula and leaving behind a stellar remnant known as a white dwarf. In the far distant future, the gravity of passing stars will gradually reduce the Sun's retinue of planets. Some planets will be destroyed, others ejected into interstellar space. Ultimately, over the course of tens of billions of years, it is likely that the Sun will be left with none of the original bodies in orbit around it.
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