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Chapter 8, Lesson 5, pdf
Chapter 8, Lesson 5, pdf

Lesson 3 The Solar System - Delaware Valley School District
Lesson 3 The Solar System - Delaware Valley School District

... • Other comets originate in an area called the Oort cloud, a region surrounding the solar system at a distance of about 30 trillion kilometers from the Sun. ...
hubble amazing universe worksheet
hubble amazing universe worksheet

... 15. Hubble provided conclusive proof that a _____________ ______________ existed. ...
EARTHSKY Why Earth has 4 seasons Some assume our planet`s
EARTHSKY Why Earth has 4 seasons Some assume our planet`s

... these changes in obliquity are not the primary driver of Earth’s climate in the century ahead. Temperatures on Earth are influenced not just by obliquity, but also by many more factors which drive our complex climate system and the global temperatures we experience from year to year. Other planets i ...
Astronomy Assignment #1
Astronomy Assignment #1

... M Star  K  mPlanet  vOrbital mPlanet  ...
Looking Back in Time Space Flight to the Stars
Looking Back in Time Space Flight to the Stars

... group of three stars that orbit each other. This group is called the Centauri system (Figure 7.8). It lies about 4.3 ly away from the solar system. If it were possible for you to have a cellphone conversation with someone living near these stars, just saying hello to each other would require more th ...
Day_39
Day_39

... civilization capable of IS communication at some time has arisen. • fnow -Fraction of habitable planets with civilization now, not in the past. ...
Earth`s Place in the Universe Test 1
Earth`s Place in the Universe Test 1

... D) the time it takes light to travel from Earth to the Sun. 3) Hunter goes outside and notices that the sun looks larger than the other stars he has seen. Why does the sun appear larger than the other stars? The Sun looks larger because it's closer to A) The Sun is the largest star in the sky. C) Ea ...
THE BALTIMORE SUN, Feb. 3, 2004, "Hubble sees key elements in
THE BALTIMORE SUN, Feb. 3, 2004, "Hubble sees key elements in

... of oxygen and carbon in the atmosphere of a planet circling another star. Oxygen and carbon are two elements considered vital to the evolution of life as we know it. But scientists said the finding does not mean that the planet supports life. Far from it. “This is oxygen in a very harsh environment, ...
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Gravity from the moon

... • 5000K D. What is the luminosity of Rigel? • 8000K BLUE ...
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Space Exploration Review Key

... 1. List seven types of electromagnetic radiation. Microwave, infrared, visible UV, xray, gamma radio 2. What is radio astronomy and how was it discovered? Using radio waves to learn about the composition of stars Discovered by listening to the sky using a radio telescope 3. What did Karl Jansky disc ...
How many stars are visible to the naked eye in the night sky?
How many stars are visible to the naked eye in the night sky?

... Since the Canadian Astronaut Program was established in 1983, twelve Canadians have been selected to become astronauts. Currently there are two active Canadian Astronauts. They are: LieutenantColonel Jeremy Hansen and Dr. David SaintJacques. ...
Phys133 SAMPLE questions for MidTerm#1
Phys133 SAMPLE questions for MidTerm#1

Stellar Metamorphosis: The Nearest Star
Stellar Metamorphosis: The Nearest Star

The Solar System
The Solar System

... The Big Bang Theory is the idea that everything in the universe started out as a superdense mass that exploded about 15 billion years ago and formed space and galaxies which are still expanding today. The universe is so huge that distances must be measured in light years. A light year is the distanc ...
Our Solar System - sci9sage-wmci
Our Solar System - sci9sage-wmci

... from Saturn’s formation. Neptune and Uranus were closer to the larger star and similarly had materials stripped away from their formation. What was left condensed to form those two planets. The other star died and the Sun, along with our forming solar system, was pushed out of the nebula and sent to ...
Chapter 1 - Colorado Mesa University
Chapter 1 - Colorado Mesa University

... • Our earth orbits our sun at a distance of ~ 150 million km, what we call an Astronomical Unit or AU and is tilted 23.6 degrees to its orbital plane. • Our sun orbits the center of the Milky Way about 8.5 kPc out. ...
Why do excited at - UC Berkeley Astronomy w
Why do excited at - UC Berkeley Astronomy w

... around Earth. The Moon came into this configuration (called tidally locked) due to gravitational interactions between the Moon and the Earth over a long period of time. Chapter 8, Review and Discussion 19 - Explain why Mercury is never seen overhead at midnight in the Earth’s sky? Looking overhead a ...
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... Evolution of planets by intense evaporation --proximity to central star or other heating mechanisms ...
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sunearthmoonstudyguideanskey

... The same side of the moon always faces the Earth because the moon takes the same amount of time to rotate and revolve. Why does the Sun appear larger than any other stars? ...
Atoms (“indivisible”)
Atoms (“indivisible”)

The length of an Earth day is determined by the time required for
The length of an Earth day is determined by the time required for

... sees a mixture of 40% circumpolar stars and 60% non-circumpolar stars sees a mixture of 60% circumpolar stars and 40% non-circumpolar stars sees a mixture of 50% circumpolar stars and 50% non-circumpolar stars sees no circumpolar stars sees only circumpolar stars The length of an Earth day is determ ...
Chapter 22
Chapter 22

Solar.System
Solar.System

... • The sun’s energy comes from nuclear fusion (where hydrogen is converted to helium) within its core. This energy is released from the sun in the form of heat and light. • Remember: Stars produce light. Planets reflect light. • A star’s temperature determines its “color.” The coldest stars are red. ...
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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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