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Astronomy - SchoolNotes
Astronomy - SchoolNotes

... Separates light into wavelengths by means of a glass prism or ...
SOL Review - Mr. Gautier`s Biology/Earth Science
SOL Review - Mr. Gautier`s Biology/Earth Science

... 2. If an area is very karst, it probably has a lot of what? 3. If the water table goes up, what zone gets bigger? 4. Most fossils are found in this type of rock? 5. According to the Law of Superposition, the oldest rock is where? 6. Cold water rising to the surface is an example of what? 7. Ocean Cu ...
A Solar System - Cloudfront.net
A Solar System - Cloudfront.net

... The Milky Way: Our galaxy containing up to 400 billion solar systems. Earth is located on one spiral arm. ...
Test 2 review session
Test 2 review session

... X rays and gamma rays will not reflect off mirrors as other wavelengths do; need new techniques. X rays will reflect at a very shallow angle, and can therefore be focused. ...
Astronomy HOMEWORK Chapter 8
Astronomy HOMEWORK Chapter 8

... Liquid metallic hydrogen is a phase of hydrogen which conducts electricity. Only Jupiter and Saturn contain hydrogen in this form. This form of hydrogen exists only at cool or cold temperatures, and at extreme pressure. No other planet has enough mass to produce enough pressure. The Sun has plenty o ...
Lecture 2: Exoplanets and life
Lecture 2: Exoplanets and life

... •  Habitable zones around F, G, and early K stars are relatively wide. Some argue they’re even wider. •  Stars hotter than about F0 are bad candidates for harboring habitable planets, primarily because of their short main sequence lifetimes •  M stars have good CHZs, in theory. Their habitable zone ...
Solar system - (SKA) South Africa
Solar system - (SKA) South Africa

... at the centre of our solar system. The planets all revolve around this extremely hot, giant ball of burning gas! The Sun is about five billion years old. In about another five billion years time it will burn up and collapse to become a white dwarf star the size of Earth. ...
Why Is the Sun a Star
Why Is the Sun a Star

... discovered a new class of stars that are between 20 – 70 Jupiter masses that are fusing some atoms and radiating some energy, but not in the fantastic amounts like true stars. These stars are known as brown dwarfs since they emit some light but are not as bright as the smallest true stars. They are ...
Atmosphere of Venus, Mars and Earth (PDF: 1.7MB)
Atmosphere of Venus, Mars and Earth (PDF: 1.7MB)

... appeared on the Earth.  It was 800 million years ago  that crustacean and mollusk appeared when oxygen that crustacean and mollusk appeared, when oxygen  amount was 1/10 of the present.  Accordingly ozone  (from three oxygen atoms) started increasing and the (from three oxygen atoms) started increas ...
Our Space Journey
Our Space Journey

... sun as well. Moon orbit takes 27 1/2 days but ... Because earth keeps on moving it takes two extra days, 29 1/2 to come back in to the same place. It takes the earth one year / 365 days 1/4 days to completely orbit the sun. The parts of the sun rotate at different speeds . The sun is star made up of ...
Solar System PPT
Solar System PPT

... toward the center of the solar system • As a comet approaches the Sun, radiation vaporizes some of the material; solar winds blow vaporized gas and dust away from the comet, forming what appears from Earth as a bright, ...
MCSD Grade 4 Science Quarterly Assessment
MCSD Grade 4 Science Quarterly Assessment

... b. date, time, air temperature, number of frogs c. date, time, water temperature, number of frogs d. date, air temperature, wind speed, number of frogs ...
Earth And the Sun
Earth And the Sun

... The Sun is the center of our Solar System There are 8 planets in our solar system We are 92 million miles from the Sun The Sun is responsible for all the energy we receive on Earth ...
Who Wants To Be A Millionaire?
Who Wants To Be A Millionaire?

The Solar System - the Scientia Review
The Solar System - the Scientia Review

... Jupiter is the largest planet in the solar system, its mass being equal to that of 310 Earths. Jupiter has a very interesting structure and history. It is home to the four Galilean satellites, Io, Europa, Ganymeds, and Callisto. These are four of Jupiter’s moons and were discovered by Galileo Galile ...
Evidence of the Big Bang and Structure of the Universe
Evidence of the Big Bang and Structure of the Universe

1000
1000

... What is the tilt of the earth on its axis? ...
Kepler 186f - Forum Skylive
Kepler 186f - Forum Skylive

... be ‘tidally locked’, which means one side always faces the star and the other side faces the cold open space, much like our moon is tidally locked with the Earth (we only see the “near side of the moon”). Fortunately, Kepler-186f orbits a fairly massive M dwarf star and it orbits at a large enough d ...
Planets and Stars Differences and Similarities
Planets and Stars Differences and Similarities

Solar System PPT
Solar System PPT

... toward the center of the solar system • As a comet approaches the Sun, radiation vaporizes some of the material; solar winds blow vaporized gas and dust away from the comet, forming what appears from Earth as a bright, ...
Astronomyunitbingo
Astronomyunitbingo

PARTS OF THE UNIVERSE
PARTS OF THE UNIVERSE

... v  Parallax: apparent shift in the position of an object when view from two different locations. v  Parallax Example v  Can be used to measure the distance of stars from Earth that are relatively close. v  Proxima Centauri: closest star to earth v  (4.3 light years away – 40 trillion km) ...
Document
Document

Astronomy Final Study Guide - With Answers!!– Name: **This will be
Astronomy Final Study Guide - With Answers!!– Name: **This will be

... We live in a spiral galaxy. Spiral galaxies usually have a lot of gas and dust in their spiral arms for new stars to form there. Irregular galaxies don’t have a definite shape (maybe because they are very young), and elliptical galaxies are older galaxies that do not have very much gas or dust, so t ...
Eight Planet System PowerPoint
Eight Planet System PowerPoint

... orbit the sun in specific places but a few have planet-crossing orbits. • Position in Space: The Asteroid Belt is a region between the inner planets and outer planets where thousands of asteroids are found orbiting around the Sun. ...
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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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