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24 Cards in this Set
- Front
- Back
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Astrophysics |
Is a branch of astronomy that studies the physical nature of starsand other celestial bodies |
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Celestial Mechanics |
Deals with the calculatons of the motion of celestial objects such as planets |
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Cosmology |
They studies the origin and development of the Universe |
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Five Scientists |
-Nicolaus Copernicus -Tycho Brahe - Johannes Kepler -Galileo Galilei - Sir Isaac Newton |
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Nicolaus Copernicus |
Adapted the scientific theory of "Heliocentrism" stating that the motion of celestial objects that can be explained without putting the earth at rest in the center of the universe |
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Tycho Brahe |
Expressed the idea of stellar parallax that if the earth does revolve along an orbit around the sun and position of the star is near it when observe from extreme points in earth's orbit six moths apart should shift with respect to the star |
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Johannes Kepler |
Derived 3 basic law -The law of Ellipses -The law of equal areas -The law of harmonies |
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The Law of Ellipses |
The path of the planet about the sun is elliptical in shape with the center of the sun being located at one focus |
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The Law of Equal Areas |
Imaginary line drawn from the center of the sun to the center of the planet will sweep out equal interval of time |
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The law of harmonies |
The ratio of the squares of the periods of any planet is equal to the ratio of the cubes of their average distances from the sun |
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Sir Isaac Newton |
Conceptualize the force of gravity: A.) Law of inertia B.) Law of acceleration C.) Law of interaction |
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1.) The Big Bang Theory |
The universe have been created I a huge explosion approximately 13.7 billion years ago |
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Note 1 |
It is the most popular theory of our universe |
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Note 2 |
It is suggest by George Henri Lamatre (1920) |
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Note 3 |
It is theorized that the universe began from a single primordial |
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2.) The Steady State Theory |
The universe is always expanding but maintain a constant average density, matter being continuously created to form new stars and galaxies at the same rate |
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Note 1 |
1. "Universe has no beginning & has no end" (May forever) |
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Note 2 |
Proposed by Herman Bondi, Thomas Gold & Fred Hoyle (1948) |
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3.) Eternal Inflation Theory |
After Big Bang, the universe expanded rapidly during a brief period called " inflation " |
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Note: |
It was presented by, PAUL STEINHARDT and ALEX VELINKIN (1983) |
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4.) Oscillating Theory |
A combination of both Big Bang and Bug Crunch as part of cyclical event |
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Note 1 |
Big Crunch states that all matter will come crashing back together, producing an enormous black hole |
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Note 2 |
This theory is proposed by RICHARD TOLMAN |
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5.) Creationist Theory |
States that God created the universe and the various process driving physical & biological evolution |
