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[DOC File]PART 1: Introduction and Basic Number and Counting Systems
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It could be that the rest of the universe beyond what we can observe is barren of matter, and hence there are only a relatively small finite number of planets on which life could potentially arise. If this is the case, and the odds of life naturalistically developing on any particular planet really are 1 in 10100,000,000,000, it would be very ...
all planets in the universe

How Many Planets Are There? (Solar System, Galaxy, Universe)
The ATA is a "Large Number of Small Dishes" array designed to be highly effective for SETI (search for extraterrestrial intelligence) observations at radio wavelengths. Slide 18: Optional Slides for Keys to the Rainbow Activity. To Say: So, how do we search for planets around other stars that may harbor life?
known planets in the universe

[DOC File]Detecting Design in an Infinite Universe - PhilSci-Archive
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D) The number of stars in a cluster is proportional to its apparent brightness. E) The number of supernovas in a galaxy is proportional to the mass of that galaxy. 11) Current estimates of the age of the universe is that the universe is about _____ old. A) 14 million years . B) 14 billion years . C) 140 billion years . D) 140 million years
number of planets in solar system

[DOC File]Exploring Our Solar System
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Compare the similarities and differences of planets to the stars in appearance, position, and number in the night sky. c. Explain why the pattern of stars in a constellation stays the same, but a planet can be seen in different locations at different times.
how many planets exist

[DOC File]Student Name
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Answer: Np is the number of planets in the Milky Way that lie within the habitability zones of their stars. flife is the fraction of these planets with life. fcivilization is the fraction of these planets on which a civilization develops at some time. fnow is the fraction of these planets …
how much planets are there in total

[DOC File]EXPLORING THE SOLAR SYSTEM, THE GALAXIES, AND THE …
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ng = number of galaxies in the visible universe = n* = number of stars in a typical galaxy = fh = fraction of stars that can have habitable planets or moons = nh = number of planets or moons around each star on which life could evolve = fl = fraction of such planets or moons on which life does evolve = fi = fraction of habitable bodies with ...
list of all known planets

[DOC File]Lick Observatory
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23. Use the following assumptions to estimate the number of planets that contain life in our galaxy that contains 400 billions stars: 0.1% of the stars are sunlike with planetary systems, 1% of these planetary systems have one Earthlike planet, and 1% of these planets has …
name all planets in universe

[DOC File]Chapter 2: The Science of Life in the Universe
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( With the spiral nebulae, the natural course of planets, and other universe phenomena. ... Our own number system, composed of the ten symbols {0,1,2,3,4,5,6,7,8,9} is called the Hindu(Arabic system. This is a base(ten (decimal) system since place values increase by powers of ten. Furthermore, this system is positional, which means that the ...
how many planets in our galaxy

[DOC File]Name_______________________________________
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and calculate the number of technological civilizations in the Milky Way (again, set the number of galaxies in the universe equal to one to calculate for the Milky Way only ). For each, term indicate your reason for selecting the value you have entered. Fraction of stars than can have habitable planets or …
all planets in the universe

[DOC File]Exam 1 (Chapters 1-4)
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Chapter 2: The Science of Life in the Universe. 1. The possibility of extraterrestrial life was first considered A) after the invention of the telescope B) only during the past few decades C) many thousands of years ago during ancient times D) at the turn of the 20th century ... it would need to contain the same number of planets as our own ...
known planets in the universe

Number of planets in universe