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DSST® ASTRONOMY  EXAM INFORMATION
DSST® ASTRONOMY EXAM INFORMATION

... used as textbooks in college courses of the same or similar title at the time the test was developed. You may reference either the current edition of these titles or textbooks currently used at a local college or university for the same class title. It is recommended that you reference more than one ...
Unit 6: Space
Unit 6: Space

... SC.8.E.5.In.3: Identify Earth’s position in the Solar System, and its size relative to the Moon and Sun. SC.8.E.5.Su.3: Identify that there are planets and moons in the Solar System. SC.8.E.5.Pa.1: Recognize that the Moon is closer to Earth than the Sun. ...
Space Revision Answers File
Space Revision Answers File

... 2. What are the four different types of galaxy shapes? Also define ‘galaxy’ The four different types of galaxy shapes are spiral, elliptical, lenticular, and irregular. A galaxy is a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction. 3. Wh ...
Excerpt from Aristotle`s “On the Heavens”
Excerpt from Aristotle`s “On the Heavens”

... The substance of the heaven and stars we call ether, not because it blazes, owing to its fiery nature (as some explain the word, mistaking its nature, which is very far removed from fire), but because it is in continual motion,†1 revolving in a circle, being an element other than the four pure and ...
Powerpoint for today
Powerpoint for today

... (for circular orbits, a=radius). Translation: the larger a planet's orbit, the longer the period. ...
PHASES OF THE MOON
PHASES OF THE MOON

... The outer planets are Jupiter, Saturn, Uranus, Neptune, Pluto. They are the Gas planets. The inner and outer planets are separated by the Asteroid Belt between Mars and Jupiter. Moons of other planets have similarities and differences to our own Moon. Similarities Differences Are called satellites O ...
Days and Years
Days and Years

Chp. 3 The sun-earth
Chp. 3 The sun-earth

... object in the universe attracts every other object." That applies to celestial bodies in the solar system as well. While the Sun's mass exerts a much greater gravitational pull on Earth than Earth does on the Sun, both bodies attract one another. The Sun's great mass keeps its eight planets circling ...
Diameter of the Milky Way
Diameter of the Milky Way

Great Migrations & other natural history tales
Great Migrations & other natural history tales

No Slide Title
No Slide Title

History of Astronomy
History of Astronomy

... • Also, the Greeks were smart enough to realize that if the Earth was orbiting the Sun, it would produce stellar parallax – The Greeks didn't believe it existed because they didn't have telescopes to observe such small variations in a star's position ...
The structure and formation of the Solar System
The structure and formation of the Solar System

AST 105 HW #2 Solution
AST 105 HW #2 Solution

... This statement is true. Without air resistance, all objects will fall under gravity at the same rate. 22. I used Newton’s version of Kepler’s third law to calculate Saturn’s mass from orbital characteristics of its moon Titan. Answer: This statement makes sense, because we can calculate the mass of ...
Paush – Indication of Weather Here I would like to
Paush – Indication of Weather Here I would like to

... these simple calculation give us the exact day & time of rainfall. ...
Star - AUSD Blogs
Star - AUSD Blogs

... miser, hoarding its resources as if trying to make amends for its prodigal youth. No one seriously expected to find planets. If there had been any before the explosion, they would have been boiled into puffs of vapor, and their substance lost in the greater wreckage of the star itself. ...
Slide 1
Slide 1

Physics 20 Lesson 23 Orbits and Satellites
Physics 20 Lesson 23 Orbits and Satellites

Solar System Book solarsystem3
Solar System Book solarsystem3

... solar system has 171 known moons. A moon is an object that orbits a larger object. It is also called a natural satellite. The moon that people know best is, of course, our own Moon. It is one of the largest moons in the solar system. It is dry, airless, and covered with mountains and craters. Scient ...
Cosmology
Cosmology

... Describe and explain asteroids and meteorites and that these usually vaporize on entering the Earth’s atmosphere. Binary stars- most stars are part of a binary system and rotate around their common centre of mass. The Big Bang Discuss cosmic background radiation and its discovery. Talk about the sig ...
The Star
The Star

... become—a White Dwarf, smaller than earth, yet weighing a million times as much. The glowing gas shells were all around us, banishing the normal night of interstellar space. We were flying into the center of the cosmic bomb that had detonated millennia ago and whose incandescent fragments were still ...
Seasonal calendar lesson plan - Department of Environment and
Seasonal calendar lesson plan - Department of Environment and

... the original direction of spin of the gas and dust cloud from which the solar system formed. The planet Venus and a couple of moons (which are really just captured asteroids) rotate in the ‘wrong’ clockwise direction. Venus is thought to have been struck by a planetoid during in the early formation ...
Physics Problems
Physics Problems

... point: despite the sun’s larger gravitational force, it is the moon that has a much greater influence on the earth’s ocean tides! 20. Your weight (Fw = mg) is due to the force of gravity between you and the earth (Fg = GmMe/r2). Set these two equations equal to each other and solve for g. The distan ...
Attachment
Attachment

... to history, science, mythology, and religion. ...
PLEIADES - ISILIMELA - Communicating Astronomy With The Public
PLEIADES - ISILIMELA - Communicating Astronomy With The Public

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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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