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Questionnaire Answers After students have completed the
Questionnaire Answers After students have completed the

... system. Without the energy created by the Sun, life on Earth would not be possible. ...
doc - UWM
doc - UWM

... system. Without the energy created by the Sun, life on Earth would not be possible. ...
Earth`s Revolution and seasons File
Earth`s Revolution and seasons File

...  Will: “It’s because one side of Earth faces the Sun and the other side faces away.”  Ava: “It’s because the Sun gives off more heat in the summer than in winter.”  Rick: “It’s because the Northern hemisphere is closer to the sun in summer than in the winter.”  Susan: “It’s because Earth’s tilt ...
Our Solar System
Our Solar System

THE SOLAR SYSTEM OUR SOLAR SYSTEM IS THOUGHT TO BE
THE SOLAR SYSTEM OUR SOLAR SYSTEM IS THOUGHT TO BE

... BEYOND THE KUIPER BELT, SCIENTIST BELIEVE THERE IS A SPHERICAL CLOUD OF DEBRIS KNOWN AS THE OORT CLOUD. THIS EXTENDS FROM ABOUT 50,000 TO 100,000 AU OR 1 LY TO ABOURT 1.7 LY FROM THE SUN. THIS REGION COULD CONTAIN UP TO 1 TRILLION ICY OBJECTS AND IS THOUGHT TO BE THE ORIGIN OF MOST COMETS. ...
Today`s Powerpoint
Today`s Powerpoint

... Aristotle: Sun, Moon, Planets and Stars rotate around fixed Earth. Aristarchus: Used geometry of eclipses to show Sun bigger than Earth (and Moon smaller), so guessed that Earth orbits the Sun. Also guessed Earth spins on its axis once a day => apparent motion of stars. Aristotle: But there's no win ...
Correspondence Course Form - The Indian Planetary Society
Correspondence Course Form - The Indian Planetary Society

PowerPoint. - teachearthscience.org
PowerPoint. - teachearthscience.org

... Consider the model situation where the Earth is the only planet in the solar system. Since the Sun is over 300,000 times more massive than Earth, the center of mass is very near the center of the Sun. Both objects will orbit around the barycenter and the Sun would have a very small wobble. barycent ...
Science The Earth Powerpoint_GB
Science The Earth Powerpoint_GB

... whole of the surface, facing the Earth.  The light from the Sun can only shine on the whole surface for one night in each cycle: a full moon.  On one night, no light from the Sun can reach the moon at all: a new moon. ...
The Earth & Beyond - Primary Resources
The Earth & Beyond - Primary Resources



... method (see graphic), which picks up slight wobbles in a star’s position caused by the gravitational tug of an orbiting planet. This method is most likely to find large planets close to their stars, however. Transits are better suited to finding something more like Earth in size and orbit. So far, 5 ...
Sem one 2011 review KEY
Sem one 2011 review KEY

... 13. Draw the sun, and label the layers. 14. What is a protostar? A new star forming, when fusion has begun. 15. What is a black hole, and how is it formed? End of a super massive star, following a super nova, when the gravity is so great that the matter shrinks to something the size of a planet or s ...
Homework 2
Homework 2

... Earth is closer to the Sun in January than in July. Therefore, in accord with Kepler’s second law: (a) Earth travels faster in its orbit around the Sun in July than in January. (b) Earth travels faster in its orbit around the Sun in January than in July. (c) It is summer in January and winter in Jul ...
Space exploration - Menihek Home Page
Space exploration - Menihek Home Page

The Evolution of the Solar System
The Evolution of the Solar System

... Birth Of The Solar System • Between the orbits of Mars and Jupiter there is a relatively large gap in the solar system, where you might expect to find a planet. But instead there is a swarm of much smaller bodies, called asteroids, or minor planets. This area is called the Asteroid Belt. Around 250 ...
Observing
Observing

... running through Greenwich England) ...
Tycho: The most accurate pre
Tycho: The most accurate pre

... NOT revolve around each other, but around their common center-of-mass • The Earth and the Moon both revolve around each other • This motion is in addition to Earth’s ...
Day-26
Day-26

... have 1 to ten times the mass of Jupiter.  Some of these orbit close to their stars and are called hot Jupiters.  It is easier to find these very large planets due to the greater “wobble” they cause for their stars. ...
Ordering_The_Universe
Ordering_The_Universe

exam_1fall_01
exam_1fall_01

... Using what you have learned in ASTR 101, choose the BEST answer to each of the following questions and indicate your choice on the answer sheet. (2 pts. each) 1. Venus is sometimes referred to as Earth's twin. Why? A. Venus orbited Earth at one time. B. Both have similar temperatures. C. Both have a ...
Lab 1: Introduction to Astronomy
Lab 1: Introduction to Astronomy

... Directions: Complete the attached crossword puzzle using the clues given below. Note two-word answers become one word in the puzzle. You are allowed to use whatever resources you’d like, including the internet. Each completed clue is worth one point. If you have trouble, feel free to ask your TA for ...
Chapter 26
Chapter 26

... gravity balances outward push of thermal pressure from nuclear fusion. 5. The sun will remain stable as long as there is a steady energy source ...
Online STUDY QUESTIONS #8 — ANSWERS 1. Mercury moves
Online STUDY QUESTIONS #8 — ANSWERS 1. Mercury moves

... 1. Mercury moves fastest when it is closest to the sun and slowest when farthest from the sun. 2. P 2 = D3 ...
Earth`s Moon and Solar System
Earth`s Moon and Solar System

... The apparent shape of the moon depends upon the changing relative positions of Earth  As the moon completes one revolution around Earth each month, the growing and shrinking lighted area makes the moon appear to change in shape  The moon’s periods of rotation and revolution are equal ...
Lecture 3 Ptolemy to Galileo
Lecture 3 Ptolemy to Galileo

... ●  classified stars by brightness ●  discovered precession of the equinoxes ●  determined: obliquity of the ecliptic ●  synodic periods of planets ●  inclination of Moon's orbit ●  place of Sun's “apogee” ●  eccentricity of the “Sun's orbit” ●  estimate of the Moon's distance, using the diameter of ...
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Rare Earth hypothesis



In planetary astronomy and astrobiology, the Rare Earth Hypothesis argues that the origin of life and the evolution of biological complexity such as sexually reproducing, multicellular organisms on Earth (and, subsequently, human intelligence) required an improbable combination of astrophysical and geological events and circumstances. The hypothesis argues that complex extraterrestrial life is a very improbable phenomenon and likely to be extremely rare. The term ""Rare Earth"" originates from Rare Earth: Why Complex Life Is Uncommon in the Universe (2000), a book by Peter Ward, a geologist and paleontologist, and Donald E. Brownlee, an astronomer and astrobiologist, both faculty members at the University of Washington.An alternative view point was argued by Carl Sagan and Frank Drake, among others. It holds that Earth is a typical rocky planet in a typical planetary system, located in a non-exceptional region of a common barred-spiral galaxy. Given the principle of mediocrity (also called the Copernican principle), it is probable that the universe teems with complex life. Ward and Brownlee argue to the contrary: that planets, planetary systems, and galactic regions that are as friendly to complex life as are the Earth, the Solar System, and our region of the Milky Way are very rare.
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