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No Slide Title
No Slide Title

... Which statement is correct? The sun is the center of our galaxy. The moon is part of our galaxy. There is one star in each galaxy. Our solar system makes up most of our galaxy. ...
Ancient Mathematics 450 B.C. 400 B.C. 350 B.C. 300 B.C. 250 B.C.
Ancient Mathematics 450 B.C. 400 B.C. 350 B.C. 300 B.C. 250 B.C.

... Determined the distance from the earth to the moon and sun (correct method, incorrect results), and according to Archimedes, thought that the planets revolved around the sun. ...
Our Place in Space
Our Place in Space

Exam 2 Review – Earth in Space, Atmosphere
Exam 2 Review – Earth in Space, Atmosphere

... Evidence for the Big Bang – Hubble’s Law, CMB (cosmic microwave background), inhomogeneity of the CMB CMB – light released when the universe became transparent to photons app. 400,000 years after the BB, redshifted into the microwave range. Planets and Solar System: Nebula hypothesis for the formati ...
What is the difference between geocentric and heliocentric theories?
What is the difference between geocentric and heliocentric theories?

Chapter 9 Lesson 2
Chapter 9 Lesson 2

... Also, none of the inner planets has more than two moons. o There are also many differences—Mercury is hot enough to melt lead while Mars never gets above 68°F. o Earth is the most unusual inner planet. Only Earth has liquid water on its surface and a large amount of oxygen in the atmosphere. This wa ...
Solar System Review
Solar System Review

... ...
The Daily Telegraph – London… 14th February 2008… New Solar
The Daily Telegraph – London… 14th February 2008… New Solar

... The smaller planet is roughly twice as far from its star as the larger one, just as Saturn is about twice as far from the sun as Jupiter. Planetary scientists who discovered them believe there could be rocky planets, like Mercury, Venus, Earth and Mars, closer to the star. Of around 250 planets so f ...
planets - Red Hook Central Schools
planets - Red Hook Central Schools

... Saturn- the most elaborate rings It’s the lowest density of any planet and would float in water ...
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AstroProjectDay4b

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Lecture on Planetary Configurations

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Metallic meteorites

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chapter 13 review

... is facing the Sun at the same angle since the Earth is still rotating around the Sun. 15. The planets of Mercury and Venus, as well as the Moon. This is because all 3 of these planets come between the Earth and the Sun. 16. Jupiter and Saturn are gas giants. Any solid core is far inside, at crushing ...
Space Explorations - Holy Cross Collegiate
Space Explorations - Holy Cross Collegiate

... – Considered the terrestrial planets because of their composition. ...
Solar System and Inner Planets
Solar System and Inner Planets

...  covered by craters caused by meteorites Venus-second planet from the sun  covered with heavy clouds  atmosphere is carbon dioxide  winds blowing at high speeds  it IS the hottest planet  can be seen early in the morning or late in the evening  called the “morning star” or “evening star”  do ...
Benchmark One Study Guide: Science Benchmark Wed
Benchmark One Study Guide: Science Benchmark Wed

... 4. What unit of measurement do we use to measure distance within the Milky Way Galaxy? ____________________________ What unit of measurement do we use to measure within our solar system? _____________________________ 5. Identify each type of galaxy below. ...
Document
Document

exploring plantetary systems 2017 study guide
exploring plantetary systems 2017 study guide

... 13.The solid portion of a comet is called its __NUCLEUS______. 14.A cloud of gases around the solid portion of a comet is known as the _____COMA____. 15._____METEOROIDS_____ are small pieces of rock moving through space. 16.Two of the inner planets are _MARS, EARTH, VENUS OR MERCURY_ 17.This body is ...
1 - Quia
1 - Quia

... b. Mars d. Earth 24. ____________ allows Earth to sustain life. a. An abundance of liquid water c. The moon’s craters b. An oxygen-rich atmosphere d. both (a) and (b) 25. The inner planets are separated from the outer planets by a. the Oort cloud. c. the Milky Way. b. an asteroid belt. d. the moon’s ...
Astrobiology News for July 2013: What Makes a Planet Habitable
Astrobiology News for July 2013: What Makes a Planet Habitable

... One  of  the  most  intriguing  possibilities  for  life-­‐sustaining  planets  is  coming  from  the   mounting  evidence  that  Earth-­‐sized  and  “super-­‐Earth-­‐sized”  planets  may  be   common  in  the  HZ’s  of  M-­‐dwarfs.  M-­‐dwarfs ...
It`s a bird, it`s a plane…
It`s a bird, it`s a plane…

... • They form tails when they pass through the inner solar system • They orbit the sun in large ellipses, and can go in the same or different directions as the planets. • They usually remain in the outermost regions of the solar system. ...
Vocabulary Terms
Vocabulary Terms

... Crater: A hole made by an impact (as of a meteorite) or by the explosion of a bomb or shell. Earth: The planet on which we live; the third planetary object orbiting around our sun. Eclipse: a: An eclipse is the total or partial hiding of a planet, star, or moon by another b: The passing into the sha ...
Public Lecture - Our Solar System
Public Lecture - Our Solar System

... • Revolution period of 225 days, but one rotation is 243 days – In other words, 1 day on Venus is longer than 1 year! ...
b. Compare the similarities and differences of planets to the stars in
b. Compare the similarities and differences of planets to the stars in

... S4E1. Students will compare and contrast the physical attributes of stars, star patterns, and planets. b. Compare the similarities and differences of planets to the stars in appearance, position, and number in the night sky. Multiple Choice: How is the planet Jupiter similar to the Sun? a. It is ora ...
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Document

... • Which way the star might be moving. ...
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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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