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The Solar System 2015
The Solar System 2015

... Saturn became famous by beauty of its bright rings. Regardless they have radius over 100,000 km, they are at most a few hundred metres thick. They look as a series of thousands of differently bright and differently transparent ringlets, but in reality they are composed of individual icy–stony fragme ...
Chapter 22 Touring our Solar System Solar System * Inventory • 1
Chapter 22 Touring our Solar System Solar System * Inventory • 1

... – _______________ is a canyon much larger than the Grand Canyon – Was not formed by running water – Large crack formed as the Tharsis Ridge formed – Flowing water is thought to create most canyons • The northern hemisphere is more flat while the southern hemisphere is more ...
Physical Attributes of Stars
Physical Attributes of Stars

... • A solar system is a group of objects in space that orbit a star • Objects include: inner and outer planets, dwarf planets, moons, and asteroids The inner planets are closest to the sun: ...
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3 Exam #1

... 35. For each of the terrestrial planets (plus the Moon), compare the relative size of the core. 36. What two factors determine whether or not a planet will be able to retain an atmosphere? Explain how they compete with each other. 37. For each of the processes mentioned (cratering, volcanism, tecton ...
From the Everett and Seattle Astronomical
From the Everett and Seattle Astronomical

... same direction as their planets rotate – tend to slowly move farther and farther away. The distance between the Earth and our own Moon is slowly increasing by this very mechanism. "Retrograde" moons – those that orbit counter to the direction their planets rotate – tend to be pulled in closer and cl ...
Astronomy Objective 1 1. An asteroid is a small, rocky object that
Astronomy Objective 1 1. An asteroid is a small, rocky object that

... 1. An asteroid is a small, rocky object that orbits the sun; most are located in a band between the orbits of Mars and Jupiter. 2. An astronomical unit (AU) is the average distance between the Earth and the sun; approximately 150 million kilometers (93 million miles). 3. Astronomy is the scientific ...
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November 2014 - Hermanus Astronomy
November 2014 - Hermanus Astronomy

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Our Solar System
Our Solar System

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PowerPoint Presentation - Planetary Configurations
PowerPoint Presentation - Planetary Configurations

... system may bear little resemblance to its original form • This view is more in line with the “planetary migration” thought to occur even more dramatically in many extrasolar planet systems • It may be difficult to prove or disprove these models of our early solar system. The many unexplained propert ...
Organize Your Space PowerPoint.
Organize Your Space PowerPoint.

... mass of the earth and if all the asteroids were combined together their diameter would be only half the diameter of our moon. ...
Regents Review Questions.Unit 2.Astronomy
Regents Review Questions.Unit 2.Astronomy

... four planets. Astronomers have discovered more than 400 planets outside of our solar system. The first extrasolar planet was detected in 1995 orbiting a star known as 51 Pegasi, which is similar in color and luminosity to our Sun. Astronomers can detect planets by identifying stars that move in resp ...
The Universe, Solar System, and Planets I
The Universe, Solar System, and Planets I

... origin found in Antarctica in 1984, announced that fossilized microorganisms from Mars might be present in it. Valleys and Canyons on Mars suggest that the planet once had large amounts of surface water. In winter, nighttime temperatures on Mars can drop as low as -191°F. ...
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F p = Fraction of good stars with planets

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... Moon, Sun, other planets, asteroids, comets, stars, other solar systems and galaxies. ...
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Chapter 19 The Solar System

... Probably composed of leftover material from when the solar system was formed Dust and ice made of methane, ammonia, carbon dioxide, and water Solar winds blow the dust to make a trail behind the comet ...
PISGAH Text by Dr. Bob Hayward ASTRONOMICAL Astronomer
PISGAH Text by Dr. Bob Hayward ASTRONOMICAL Astronomer

... call this an occultation of Aldebaran by the moon. Since the moon in its orbit around the earth moves roughly its own diameter in an hour, we should see Aldebaran reappear from behind the western edge of the moon at around 10:20 p.m. Obviously, the moon, at about a quarter million miles from the ear ...
THE LIBERAL ARTS AND SCIENCES The liberal arts and sciences
THE LIBERAL ARTS AND SCIENCES The liberal arts and sciences

... billions of civilisations out there – or we may be the only one. At the moment, there is no scientific evidence one way or the other. Another very important issue is the possibility of a collision with an asteroid or other space object – as seen in Russia recently. Currently in the news is the come ...
7.1 Space Flight to the Stars
7.1 Space Flight to the Stars

... space has fascinated and continues to fascinate people all over the world. Although we have discovered much about space, it remains a mystery to humankind. Gravity Trailer [2013] http://www.youtube.com/watch?v=OiTiKOy59o4 ...
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... 10. To measure the distance between stars in distant galaxies, astronomers use the _LIGHT YEAR_ as a unit. B. True or False (If the statement is false, rewrite the statement to make it true) [10 /10] 11. The distance between Earth and the Sun is one light year. ...
Ch. 20-2 Sun Study Gd. Revised
Ch. 20-2 Sun Study Gd. Revised

... 5. A chunk of ice and dust whose orbit is usually a long, narrow ellipse is a(n) __________________ . 6. If a meteoroid hits Earth’s surface, it is called a(n)____________________________. 7. A rocky object that revolves around the sun, but is too small to be considered a planet, is a(n) ___________ ...
Round Earth / Flat Earth - Tuslaw Local School District
Round Earth / Flat Earth - Tuslaw Local School District

... Eratosthenes - Greek mathematician, 3rd century BC • Read of the city of Syene on the Nile River, 1 day each year on summer solstice the sun shone directly down an abandoned well illuminating the bottom • He assumed that the sun was very far away and therefore all of its light struck the earth in p ...
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Atmosphere of Venus, Mars and Earth (PDF: 1.7MB)
Atmosphere of Venus, Mars and Earth (PDF: 1.7MB)

... (from three oxygen atoms) started increasing and the (from three oxygen atoms) started increasing and the  ozone layer in the upper atmosphere stopped solar  UV and X ray which are poisonous for the life UV and X‐ray, which are poisonous for the life.   Formation of the ozone layer promote the life  ...
Topic: Introduction to Earth, Moon, Sun Date:
Topic: Introduction to Earth, Moon, Sun Date:

... Why do we experience moon phases? ...
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Astrobiology



Astrobiology is the study of the origin, evolution, distribution, and future of life in the universe: extraterrestrial life and life on Earth. This interdisciplinary field encompasses the search for habitable environments in our Solar System and habitable planets outside our Solar System, the search for evidence of prebiotic chemistry, laboratory and field research into the origins and early evolution of life on Earth, and studies of the potential for life to adapt to challenges on Earth and in outer space. Astrobiology addresses the question of whether life exists beyond Earth, and how humans can detect it if it does. (The term exobiology is similar but more specific—it covers the search for life beyond Earth, and the effects of extraterrestrial environments on living things.)Astrobiology makes use of physics, chemistry, astronomy, biology, molecular biology, ecology, planetary science, geography, and geology to investigate the possibility of life on other worlds and help recognize biospheres that might be different from the biosphere on Earth. The origin and early evolution of life is an inseparable part of the discipline of astrobiology. Astrobiology concerns itself with interpretation of existing scientific data; given more detailed and reliable data from other parts of the universe, the roots of astrobiology itself—physics, chemistry and biology—may have their theoretical bases challenged. Although speculation is entertained to give context, astrobiology concerns itself primarily with hypotheses that fit firmly into existing scientific theories.The chemistry of life may have begun shortly after the Big Bang, 13.8 billion years ago, during a habitable epoch when the Universe was only 10–17 million years old. According to the panspermia hypothesis, microscopic life—distributed by meteoroids, asteroids and other small Solar System bodies—may exist throughout the universe. According to research published in August 2015, very large galaxies may be more favorable to the creation and development of habitable planets than smaller galaxies, like the Milky Way galaxy. Nonetheless, Earth is the only place in the universe known to harbor life. Estimates of habitable zones around other stars, along with the discovery of hundreds of extrasolar planets and new insights into the extreme habitats here on Earth, suggest that there may be many more habitable places in the universe than considered possible until very recently.Current studies on the planet Mars by the Curiosity and Opportunity rovers are now searching for evidence of ancient life as well as plains related to ancient rivers or lakes that may have been habitable. The search for evidence of habitability, taphonomy (related to fossils), and organic molecules on the planet Mars is now a primary NASA objective on Mars.
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