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Unit Plan
Unit Plan

... 19. How does the rise and set location of the sun vary for the following dates: June 21 to September 21, September 21 to December 21, December 21 to March 21, March 21 to June 21? 20. The Earth goes around the Sun in one year. Approximately how far does the Sun move in one day around the celestial ...
The Sun . . .
The Sun . . .

... 90% of stars are main sequence. Supergiant: 20 to 200 times larger than the Sun, but also much brighter, cooler and less dense. Dwarf: Small stars; fairly hot but very dim. Diameter is about the same as Earth, but their mass is equal to the sun . . . ...
The fantastic journey of that ring on your finger: From
The fantastic journey of that ring on your finger: From

... an effect similar to hitting a basketball with a mallet (don’t try this at home!). This triggers a colossal explosion known as a supernova. The shockwave blows the outer layers of the star out into space at extremely high speeds, dispersing all of the elements that comprise them. This detritus coale ...
HE Solar System is made up of the sun and its a family of eight
HE Solar System is made up of the sun and its a family of eight

... of 7,700 miles and its mean distance from the sun is 67,200,000 miles. I t is the earth s nearest neighbor , for sometimes it approaches to within 2 6 , 0 0 ~ , 0 0 0miles. I t goes around the s u n in 2 2 j days and the generally agreed upon time of revolution on its axis is 2 3 hours nearly. This ...
Astronomy Unit BM study guide
Astronomy Unit BM study guide

... The universe is composed of matter and energy. All of the matter in the universe now was in the universe when it formed. There is evidence to support that scientists are able to estimate the age of the universe in two ways: 1) By looking for the oldest stars Nebula (gas and dust) exist in space and ...
Perfect Little Planet
Perfect Little Planet

Lect07-2-4-09
Lect07-2-4-09

... Determining the mass of an object (summary): 1. We observe the motion of a very much less massive object that is in orbit about the object whose mass we wish to know. 2. We estimate, one way or another, the distance to the object. 3. Kepler’s third law of planetary motion (which falls into this cat ...
Meteors and Comets
Meteors and Comets

... l  Comets are like frozen snowballs l  Comets look like asteroids except for the tail ...
Teacher: Mrs. Zimmerman Astronomy Part 2 Practice Test 1. In the
Teacher: Mrs. Zimmerman Astronomy Part 2 Practice Test 1. In the

... 38. [Refer to figure 8] A total solar eclipse sometimes occurs when the Moon is at position A. Explain why a total solar eclipse does not occur every time the Moon is at position A. --------------------------39. Base your answer to the question on the diagram below, which shows Earth as viewed from ...
Meteors and Comets
Meteors and Comets

... Scientists try to predict when comets will come too close to Earth Sometimes comets collide with planets and their moons Haley’s Comet is the most famous comet, it passes by Earth every 76 years – the last time it passed by Earth was in 1986 When Earth crosses the path of a comet, leftover dust and ...
Science - Mansfield ISD
Science - Mansfield ISD

... above and on the Word Sort http://www.prometheanplanet.co surface of Earth 2H – Book Review m/en/Resources/Item/69879/wat through the water cycle 2D - KWL er-cycle-game and explain the role of the Sun as a major source of energy in this process(Supporting Standard) (8) Earth and Space: The student k ...
The Milky Way
The Milky Way

... Planets of our solar system can be divided into ...
Digital Moon - Net Start Class
Digital Moon - Net Start Class

... A class is planning a trip to the beach. They would like to choose a day that will be the most sunny yet have a lower temperature for the daily high. Based on this five-day prediction, which day should they ...
Climbing the Cosmic Distance Ladder: How Astronomers Measure
Climbing the Cosmic Distance Ladder: How Astronomers Measure

... Distances to very distant stars  •  This gave a way to obtain the absolute brightness for  these stars, and hence observed distances.   •  Because Cepheids are so bright, this method works  up to 13,000,000 light years, well beyond the Milky  Way! Most galaxies are fortunate to have at least  one  ...
Galaxies and Stars
Galaxies and Stars

... The bright areas that appear to be stars are actually clusters of stars that can sometimes number in the millions! The arms of this spiral galaxy are filled with the glow of dust and gasses that will become new stars. ...
HERE - Gallopade International
HERE - Gallopade International

the earth in space - North Salem Schools Teachers Module
the earth in space - North Salem Schools Teachers Module

... b. the Moon’s period of rotation is the same as its period of revolution –therefore same side of the Moon always faces the Earth 5. Phase - the amount of lighted surface visible from the Earth a. phases are caused by the Moons revolution around the Earth b. the angle between the Sun, Earth, and Moon ...
R - Uplift North Hills Prep
R - Uplift North Hills Prep

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... Answer the following questions in your notebook. Write the complete question and write your answer in complete sentences. 4. Explain how astronomers measure the distance to nearby stars. 5. What are the main characteristics used to classify stars? 6. How would you classify the sun based on each of t ...
doc - IAC
doc - IAC

... same way as planetary masses are measured. The most massive ones are 100 to 150 times heavier than the Sun. The most massive stars evolve more rapidly than those of low mass. Does this in any way affect the galaxies in which they are found? Indeed it does. Massive stars have very short lifetimes, at ...
Precession of the Earth`s Axis
Precession of the Earth`s Axis

Geoscience Final Review material
Geoscience Final Review material

... d. All above, except “a”, but including “b” and “c” 130. The shortest wavelengths are a. Red c. Gamma b. Blue d. Radio 131. A light-year is a. The distance light travels in a year c. The time it takes for light to travel b. As far as it is from Earth to Vega d. The distance across our Solar System 1 ...
Earth`s Moon
Earth`s Moon

... PO1: Explain the phases of the Moon in terms of the relative positions of the Earth, Sun, and Moon. Earth’s Moon  Our moon is the closest celestial object to Earth.  A moon is a naturally occurring satellite or an object that orbits another object.  It takes one month for our moon to orbit the Ea ...
Honors Physics – Ch 7 Practice Problems
Honors Physics – Ch 7 Practice Problems

If Earth had no tilt, what else would happen?
If Earth had no tilt, what else would happen?

... making the survival rate there lower as well. •The species would have evolved differently (micro-evolution), thus different life would be on Earth. •But we would have a habitable zone between the poles and the equator, but unfortunately it would be a smaller habitable region than we have now. ...
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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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