AST101H1 Lecture : AST101 - L20 [Nov 25]

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limegoose606

5 Apr 2011

School

UTSG

Department

Astronomy & Astrophysics

Course

AST101H1

Professor

Stefan Mochnacki

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AST101H1 Full Course Notes

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8. 1 the search for origins: what properties of our solar system must a formation theory explain, patterns of motion of the large bodies. generally spin in same direction (some exceptions: planets fall into two major categories: large, hydrogen-rich jovian planets: swarms of asteroids and comets populate the solar system. oort cloud: several notable exceptions to these trends stand out: earth"s relatively large moon: what theory best explains the features of our solar system, the nebular theory states that our solar system formed from the gravitational collapse of a giant interstellar gas cloud: the solar nebula. a large amount of evidence supports this hypothesis: close encounter hypothesis torn off the sun by a close encounter with another star states that the planets formed from debris. cannot explain observed motions and types of planets. very unlikely except, maybe, at the earliest stages of formation in a cluster.

Related Questions

Which of the following correctly describes an inner planet?

They are having rings orbiting around the planet.
It has no moon or few moons orbiting around the planet.
It lies before the asteroid belt in our solar system.
They are with solid and rocky terrestrial.
They are smaller than the giant planets.

which of the following statements is not an observed pattern of motion in our solar system?

A) Most planets orbit at the same speed.

B) All planets orbit the Sun in the same direction.

C) Most planetary orbits lie nearly in the same plane.

D) Most planets rotate in the same direction in which they orbit.

E) Almost all moons orbit their planet in the same direction as the planet's rotation.

scarletspider222

Which, if any, of the following statements is/are true?

1)Our galaxy, The Milky Way, is a member of The Local Group, whichis one of several groups of galaxies located in the VirgoSupercluster.
2)Most astrophysicists believe that our Solar System formed from animmense cloud of gas and dust about 4-1/2 million years ago.
3)Planets are believed to have formed by a process known asaccretion.
4)Two key elements in the Condensation Theory of PlanetaryFormation are 5)Conservation of Angular Momentum and CondensationNuclei.
6)The name of the second largest object in the Universe is TheSouthern Wall.
7)In our Solar System, the four jovian planets, Jupiter, Saturn,Uranus, and Neptune, are separated from the four terrestrialplanets, Mercury, Venus, Earth, and Mars, by the Kuiper Belt.
8)Our star, The Sun, is located on the Orion Arm, about 26,000light-years from the center of the Andromeda Galaxy.
9)It takes a photon of light about 4-1/5 years to travel from ourSolar System to the second closest star to Earth, ProximaCentauri.
10)The full range of human knowledge about our Universe spans about40 or 41 orders of magnitude on a spatial scale and about 13.7billion years on a temporal scale.
11)It takes a photon of light about 5-1/2 hours to travel from theSun to the orbit of the former planet Pluto.

AST101H1 Lecture : AST101 - L20 [Nov 25]

AST101H1 Full Course Notes

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