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... smaller quantities of heavier elements, including oxygen, carbon, neon and iron. ...
Document
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... smaller quantities of heavier elements, including oxygen, carbon, neon and iron. ...
Astronomy 1001/1005 Midterm (200 points) Name:
Astronomy 1001/1005 Midterm (200 points) Name:

... Describe the two most important properties of a telescope. Explain what they mean and why they are important. The most important property of a telescope is its collecting area or the size of its objective lens. The only information we get in astronomy comes from light, so the more light we can colle ...
UCSB CLAS
UCSB CLAS

... distance at which the Earth orbits the Sun. The orbital speed of this planet of Star X is A. faster than the Earth’s orbital speed. B. the same as the Earth’s orbital speed. C. slower than the Earth’s orbital speed. D. not enough information given to decide ...
Aliens
Aliens

Astronomy 07 Life in the Universe Final Exam Test Bank Homework
Astronomy 07 Life in the Universe Final Exam Test Bank Homework

Astronomy
Astronomy

... Jupiter is like a mini solar system Milky Way is populated by uncountable number of stars  Earth-centered universe is too simple Phases of Venus found to disagree with the geocentric model  ...
Chapter 24 PowerPoint
Chapter 24 PowerPoint

... • Large rotating hurricane called the Great Red Spot. (2 Earth sizes) • 4 faint rings in orbit. • 2.5 times greater in mass than all of the other planets combined. • Has at least 63 natural satellites, 4 largest are known as the Galilean Moons. The Great Red Spot has been observed for over 300 year ...
History of Earth and Life
History of Earth and Life

... of all vertebrate are constructed from the same array of bones. ______________ structures are structures that have a similar ____________ but do not share a common ancestry. ___________ structures are considered to be evidence of an organism’s evolutionary past. They are bones or other structures th ...
the universe
the universe

... 27 days and 8 hours 27 days and 8 hours 384,400 km 4.6 billion years No atmosphere , wind or weather -155:c to 120:c ...
ASTRONOMICAL PARAMETERS OF THE EARTH AND THE SUN
ASTRONOMICAL PARAMETERS OF THE EARTH AND THE SUN

... The earth revolves about its minor or shorter axis (i.e. polar axis), on an average, once in twenty-four hours, from West to East. If the earth is considered stationary, the whole celestial sphere along with its celestial bodies like the stars, sum, moon etc. appear to revolve round the earth from E ...
Powerpoint - BU Imaging Science
Powerpoint - BU Imaging Science

... • In 1572 Tycho saw a new star in the night sky. It was as bright as Jupiter, soon became as bright as Venus, and even became bright enough to see during the day for two weeks. As it dimmed, it went from white to yellow to orange to red. It was visible in the night sky for over one year • Tycho saw ...
Star
Star

... Where do we come from? • The first (and simplest) atoms were created during the Big Bang. • More complex atoms were created in stars. • When the star dies, they are expelled into space…. to form new stars and planets! Most of the atoms in our bodies were created in the core of a star! ...
Taylor - St. Brigid
Taylor - St. Brigid

... twilight hours Ω The largest feature on mercury is the Caloris ...
astr100_finalexam
astr100_finalexam

... B) Near, although probably not right at, the center of the Universe, as shown by the fact that the edge is so far away. C) Somewhere in an expanding Universe, but not in any special part of it. D) Near the edge of an expanding Universe, as shown by the microwave radiation coming to us from the edge. ...
Geocentric Model of the Universe
Geocentric Model of the Universe

Grade 9 Science – Unit 4
Grade 9 Science – Unit 4

... Grade 9 Applied Science – Space ...
Worksheet 1
Worksheet 1

... O. A region between the orbits of Mars and Jupiter in which most of the Solar System’s asteroids are located P. A rocky planet similar to the Earth in size and structure Q. A vast region in which comet nuclei orbit R. Microscopic solid dust particles in interstellar space S. An object that orbits th ...
The Solar System
The Solar System

... – This model saw the solar system as perfect spheres with attached celestial bodies rotating around a fixed Earth. – The planets rotated around the Earth in perfect circles. – This model grew out of the ideas that: • Humans were at the center of a perfect universe created just for them. • Since Heav ...
Powerpoint file
Powerpoint file

... planets (maybe giant planets) that survived the supernova explosion 2. Second Generation Planets: Planets that formed in the debris disk left behind after the supernova explosion (more likely) Debris disk found around another pulsar fits this picture! ...
Chapter 10
Chapter 10

... four “stars” orbiting Jupiter. ...
4. How can we select stars whose planets are likely homes for life?
4. How can we select stars whose planets are likely homes for life?

... Travel between stars is nearly impossible because the distances are too great and nature has imposed a very real speed limit that we can not exceed. Nothing can travel faster than the speed of light, and human travel can not be expected to exceed even a small fraction of the speed of light. Therefor ...
Astronomical Figures
Astronomical Figures

... *considered the father of modern planetary science for his wide ranging studies of the solar system. *established the atmosphere of Saturn's moon, Titan, and discovered Saturn's moon, Miranda, and Neptune's Nereid. Kuiper's prediction of comets traveling near the orbit of Neptune, the Kuiper belt. ...
20081 Study Guide_77-120
20081 Study Guide_77-120

... 2. During each season of the year as the earth revolves around the sun, some constellations are obscured by the sun. 3. Polaris gives off a lot of light but is very distant from the earth. 4. A massive protostar will have more bits of matter that increase its pressure. This increased pressure causes ...
Seasonal Motion
Seasonal Motion

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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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