Implications of the Search and Discovery
... Number of Intelligent Civilizations = Number of Stars in the Galaxy (400 billion) x Fraction of Stars with Planets (1/4?) x Number of suitable planets per star (2?) x Fraction of planets where life appears (1/2??) x Fraction of planets with intelligence (???) x Fraction of planets with technology (? ...
... Number of Intelligent Civilizations = Number of Stars in the Galaxy (400 billion) x Fraction of Stars with Planets (1/4?) x Number of suitable planets per star (2?) x Fraction of planets where life appears (1/2??) x Fraction of planets with intelligence (???) x Fraction of planets with technology (? ...
Implications of the Search and Discovery of Life in the Universe
... Number of Intelligent Civilizations = Number of Stars in the Galaxy (400 billion) x Fraction of Stars with Planets (1/4?) x Number of suitable planets per star (2?) x Fraction of planets where life appears (1/2??) x Fraction of planets with intelligence (???) x Fraction of planets with technology (? ...
... Number of Intelligent Civilizations = Number of Stars in the Galaxy (400 billion) x Fraction of Stars with Planets (1/4?) x Number of suitable planets per star (2?) x Fraction of planets where life appears (1/2??) x Fraction of planets with intelligence (???) x Fraction of planets with technology (? ...
Geller Slides on Contact with ET
... Where to look in galaxy? • Disk region of galaxy – Population I stars that have access to heavy elements during formation • Star like our Sun worked at least once ...
... Where to look in galaxy? • Disk region of galaxy – Population I stars that have access to heavy elements during formation • Star like our Sun worked at least once ...
Explorations of the Universe
... x Fraction of Stars with Planets (1/4?) x Number of suitable planets per star (2?) x Fraction of planets where life appears (1/2??) x Fraction of planets with intelligence (???) x Fraction of planets with technology (???) x Fraction of planet’s life with technology (???) ...
... x Fraction of Stars with Planets (1/4?) x Number of suitable planets per star (2?) x Fraction of planets where life appears (1/2??) x Fraction of planets with intelligence (???) x Fraction of planets with technology (???) x Fraction of planet’s life with technology (???) ...
The Search for Extraterrestrial Life
... • If we understand the needs of life that our planet currently provides for us, then we will be able to look for those things in other planets and possibly find life there. The hope is that we will find that we are not alone; we aren’t limited by this planet; and ultimately we learn more about life. ...
... • If we understand the needs of life that our planet currently provides for us, then we will be able to look for those things in other planets and possibly find life there. The hope is that we will find that we are not alone; we aren’t limited by this planet; and ultimately we learn more about life. ...
Inverse Square Law
... If you think about this expression for a minute you will see that it makes sense. If both stars appear equally bright as seen from Earth, then the more distant star is the brighter one. Now to change a brightness ratio bA / bB or a luminosity ratio LA / LB to a magnitude difference we can use Table ...
... If you think about this expression for a minute you will see that it makes sense. If both stars appear equally bright as seen from Earth, then the more distant star is the brighter one. Now to change a brightness ratio bA / bB or a luminosity ratio LA / LB to a magnitude difference we can use Table ...
Is there anybody out there?
... N* = stars in the Milky Way galaxy --> 200 to 300 million fp = fraction of stars with planets --> 5-6% fpm = fraction of metal-rich planets --> less than 1% ne = planets in a stars habitable zone --> 1 ng = stars in a galactic habitable zone fi = fraction of habitable planets where life does arise ...
... N* = stars in the Milky Way galaxy --> 200 to 300 million fp = fraction of stars with planets --> 5-6% fpm = fraction of metal-rich planets --> less than 1% ne = planets in a stars habitable zone --> 1 ng = stars in a galactic habitable zone fi = fraction of habitable planets where life does arise ...
Implications of the Search and Discovery
... Where to look in galaxy? • Disk region of galaxy – Population I stars that have access to heavy elements during formation • Star like our Sun worked at least once ...
... Where to look in galaxy? • Disk region of galaxy – Population I stars that have access to heavy elements during formation • Star like our Sun worked at least once ...
life
... •We have the ability to destroy civilization •We are also damaging our environment •We are using up non-renewable resources •Civilizations may “mature” – some evidence •Sustainable civilizations is technically possible ...
... •We have the ability to destroy civilization •We are also damaging our environment •We are using up non-renewable resources •Civilizations may “mature” – some evidence •Sustainable civilizations is technically possible ...
Are we Alone? The Search for Life Beyond the
... The Seminal Paper • In 1959 Giuseppe Cocconi and Phillip Morrison published a paper in Nature in which they pointed out that given two telescopes of the size of the newly built 250ft Mk1 Radio Telescope at Jodrell Bank it would, in principle, be possible to communicate across inter-stellar distance ...
... The Seminal Paper • In 1959 Giuseppe Cocconi and Phillip Morrison published a paper in Nature in which they pointed out that given two telescopes of the size of the newly built 250ft Mk1 Radio Telescope at Jodrell Bank it would, in principle, be possible to communicate across inter-stellar distance ...
Day_39
... • number of stars in our galaxy • fraction of stars with planets • average number of planets per star • fraction of planets with life • fraction that develop advanced technology • Result is the likelihood such planets exist today. ...
... • number of stars in our galaxy • fraction of stars with planets • average number of planets per star • fraction of planets with life • fraction that develop advanced technology • Result is the likelihood such planets exist today. ...
ASTR101 Unit 14 Assessment Answer Key 1. It is believed that the
... 1. It is believed that the existence of liquid on a planet is a requirement for the existence of life. The habitable zone is the range of distances from a particular star such that the temperature of a planet would allow for liquid water on the surface. 2. The number of stars in the Milky Way Galaxy ...
... 1. It is believed that the existence of liquid on a planet is a requirement for the existence of life. The habitable zone is the range of distances from a particular star such that the temperature of a planet would allow for liquid water on the surface. 2. The number of stars in the Milky Way Galaxy ...
ISP 205: Visions of the Universe
... • Light travels at a finite speed (300,000 km/s). • The farther away we look in distance, the further back we look in time. • Allows us to study the history of the Universe. ...
... • Light travels at a finite speed (300,000 km/s). • The farther away we look in distance, the further back we look in time. • Allows us to study the history of the Universe. ...
File
... • Can be estimated by dividing current number of stars in Galaxy by the 10 Ga lifetime of our Galaxy. • We obtain a formation rate of 10 stars ...
... • Can be estimated by dividing current number of stars in Galaxy by the 10 Ga lifetime of our Galaxy. • We obtain a formation rate of 10 stars ...
astronomy final exam - Physics and Astronomy
... Which probabilities enter into the Drake Equation? Life as we know it is based on what substances? How would you estimate the present number of technical civilizations in our galaxy? Why is carbon is so important to living organisms? What is the necessary medium for the transport of materials needed ...
... Which probabilities enter into the Drake Equation? Life as we know it is based on what substances? How would you estimate the present number of technical civilizations in our galaxy? Why is carbon is so important to living organisms? What is the necessary medium for the transport of materials needed ...
File
... formation, averaged over lifetime of Galaxy) x (fraction of stars having planetary systems) x (average # of habitable planets within those planetary systems) x (fraction of those habitable planets on which life arises) x (fraction of those life-bearing planets on which intelligence evolves) x (fract ...
... formation, averaged over lifetime of Galaxy) x (fraction of stars having planetary systems) x (average # of habitable planets within those planetary systems) x (fraction of those habitable planets on which life arises) x (fraction of those life-bearing planets on which intelligence evolves) x (fract ...
Conversations with the Earth
... • These Sun-like, habitable stars have just the right distance, constancy, and temperature to qualify in a forthcoming enlarged radio search. ...
... • These Sun-like, habitable stars have just the right distance, constancy, and temperature to qualify in a forthcoming enlarged radio search. ...
Life: Definition, Origin, Criteria
... • The SETI project to search for radio signals from outer space ...
... • The SETI project to search for radio signals from outer space ...
Life: Definition, Origin, Criteria
... • The SETI project to search for radio signals from outer space ...
... • The SETI project to search for radio signals from outer space ...
Life: Definition, Origin, Criteria
... • The SETI project to search for radio signals from outer space ...
... • The SETI project to search for radio signals from outer space ...
Current Study Guide - Department of Physics and Astronomy
... What is the probability of a technological civilization existing around a 10 solar mass star? Which probabilities enter into the Drake Equation? Life as we know it is based on what substances? How would you estimate the present number of technical civilizations in our galaxy? Why is carbon is so imp ...
... What is the probability of a technological civilization existing around a 10 solar mass star? Which probabilities enter into the Drake Equation? Life as we know it is based on what substances? How would you estimate the present number of technical civilizations in our galaxy? Why is carbon is so imp ...
33_drake
... • We have evidence that about 700 million years ago earth was covered in a global and very deep ice age. • Originally it was thought such an ice age would be disastrous with no way out. ...
... • We have evidence that about 700 million years ago earth was covered in a global and very deep ice age. • Originally it was thought such an ice age would be disastrous with no way out. ...
Lecture 2
... Class will be in Fiske Planetarium on Tuesday (geodesic dome west of events center) ...
... Class will be in Fiske Planetarium on Tuesday (geodesic dome west of events center) ...
Lecture 27 (pdf from the powerpoint)
... 10% of sunlike stars have planets, and the true proportion may be much higher, since only planets gas-giant size and larger can be detected with current technology.[3] •ne = Estimated by Drake as 2. The same paper by Marcy, notes that most of the observed planets have very eccentric orbits, or orbit ...
... 10% of sunlike stars have planets, and the true proportion may be much higher, since only planets gas-giant size and larger can be detected with current technology.[3] •ne = Estimated by Drake as 2. The same paper by Marcy, notes that most of the observed planets have very eccentric orbits, or orbit ...