Evidence of the Big Bang and Structure of the Universe
... spectral lines of hydrogen gas observed in a laboratory. A) Galaxy B is moving away from Earth, but galaxies A and C are moving toward Earth. B) Galaxy A is moving away from Earth, but galaxies B and C are moving toward Earth. C) Galaxies A, B, and C are all moving away from Earth. D) Galaxies A, B, ...
... spectral lines of hydrogen gas observed in a laboratory. A) Galaxy B is moving away from Earth, but galaxies A and C are moving toward Earth. B) Galaxy A is moving away from Earth, but galaxies B and C are moving toward Earth. C) Galaxies A, B, and C are all moving away from Earth. D) Galaxies A, B, ...
The Milky Way
... In all of the directions it can whizz As fast as it can go, at the speed of light, you know, Twelve million miles a minute, and that's the fastest speed there is. So remember, when you're feeling very small and insecure, How amazingly unlikely is your birth, And pray that there's intelligent life so ...
... In all of the directions it can whizz As fast as it can go, at the speed of light, you know, Twelve million miles a minute, and that's the fastest speed there is. So remember, when you're feeling very small and insecure, How amazingly unlikely is your birth, And pray that there's intelligent life so ...
Hubble`s Expansion of the Universe
... of other fuzzy objects in the sky which he knew were not comets. Worried that other comet hunters might be similarly confused, he compiled a list to prevent their misidentification. Messier’s list (where objects are identified by M for Messier, followed by a number, e.g. M51) contained information o ...
... of other fuzzy objects in the sky which he knew were not comets. Worried that other comet hunters might be similarly confused, he compiled a list to prevent their misidentification. Messier’s list (where objects are identified by M for Messier, followed by a number, e.g. M51) contained information o ...
Is Anyone Out There? Solving the Drake Equation
... Those variants best suited to survive, best able to reproduce, are more likely to pass on their genetic code to the next generation ...
... Those variants best suited to survive, best able to reproduce, are more likely to pass on their genetic code to the next generation ...
Great Migrations & other natural history tales
... Notice that this would be an exact expression for the derivative if pressure P were falling from a large P(0) in the center to P(R)~0 at the surface as a strait line section (linearly). Linear approximation is not necessarily accurate, but it needs not to be here. Plugging dP/dr ~ -P(0)/R into the h ...
... Notice that this would be an exact expression for the derivative if pressure P were falling from a large P(0) in the center to P(R)~0 at the surface as a strait line section (linearly). Linear approximation is not necessarily accurate, but it needs not to be here. Plugging dP/dr ~ -P(0)/R into the h ...
File
... Yes, mass and energy are related, the more mass you have the greater the energy and vice-versa. If you double the mass of an object it will have more energy within it. Question 4: Analyze the statement: “if it is possible to change mass into energy a little bit of mass could produce a lot of energy” ...
... Yes, mass and energy are related, the more mass you have the greater the energy and vice-versa. If you double the mass of an object it will have more energy within it. Question 4: Analyze the statement: “if it is possible to change mass into energy a little bit of mass could produce a lot of energy” ...
Scale and Structure of the Universe
... •Which one contains our solar system? •How big is our galaxy? •What is a supercluster? •Which one contains our galaxy? •How big is our supercluster? •What is a filament structure? •How big is the known universe? ...
... •Which one contains our solar system? •How big is our galaxy? •What is a supercluster? •Which one contains our galaxy? •How big is our supercluster? •What is a filament structure? •How big is the known universe? ...
Aliens
... Look for regular dips in the brightness of a star as a large planet passes, or transits, in front of it. Requires the extrasolar planet’s orbital plane to be pointed right at Earth. Fraction of starlight blocked tells us planet’s size. Time between transits gives us orbit period. Note that we need t ...
... Look for regular dips in the brightness of a star as a large planet passes, or transits, in front of it. Requires the extrasolar planet’s orbital plane to be pointed right at Earth. Fraction of starlight blocked tells us planet’s size. Time between transits gives us orbit period. Note that we need t ...
Our Place In the Universe
... A star and all the material that orbits it, including its planets and moons ...
... A star and all the material that orbits it, including its planets and moons ...
life
... Number of communicating civilisations = rate of formation of suitable stars x fraction of these stars with planets x number of Earth-like planets per system x fraction of such planets which develop life x fraction of life-bearing planets evolving intelligence x fraction of intelligent specie ...
... Number of communicating civilisations = rate of formation of suitable stars x fraction of these stars with planets x number of Earth-like planets per system x fraction of such planets which develop life x fraction of life-bearing planets evolving intelligence x fraction of intelligent specie ...
Why SETI will Fail
... and history indicates that intelligent creatures will follow the latter path -• Exploration of our solar system began with telescopic observations from Earth. But as soon as we developed the capability, we launched spaceships to explore planets and moons up close because observing from afar is limit ...
... and history indicates that intelligent creatures will follow the latter path -• Exploration of our solar system began with telescopic observations from Earth. But as soon as we developed the capability, we launched spaceships to explore planets and moons up close because observing from afar is limit ...
Lecture 1 - University of Maryland Astronomy
... Armed as we now are, we can start surveying the universe. We’ll do this by moving outward: planets, stars, galaxies, and the universe itself. The Solar System Our Solar System is the one place in the universe that we know absolutely can support life! Therefore, as we go through this course, please h ...
... Armed as we now are, we can start surveying the universe. We’ll do this by moving outward: planets, stars, galaxies, and the universe itself. The Solar System Our Solar System is the one place in the universe that we know absolutely can support life! Therefore, as we go through this course, please h ...
What is life?
... Intelligence (SETI) In addition to sending messages to possible extraterrestrial civilizations, there are also programs to listen for intelligent messages from space: SETI. Signals would be overwhelmed by background noise ...
... Intelligence (SETI) In addition to sending messages to possible extraterrestrial civilizations, there are also programs to listen for intelligent messages from space: SETI. Signals would be overwhelmed by background noise ...
Exoplanet
... We want to estimate the likelihood that there are stars with planets with life that developed into complex “intelligent” technological forms that might be sending or receiving signals. What we really want is the total number of them, because that tells us how far we might have to search. The Drake e ...
... We want to estimate the likelihood that there are stars with planets with life that developed into complex “intelligent” technological forms that might be sending or receiving signals. What we really want is the total number of them, because that tells us how far we might have to search. The Drake e ...
Slide 1
... In the Galaxy, we have1011 stars , or we would have 100,000 civilizations in the Galaxy by now. This is astonishing, especially if we say that these civilizations have arisen at random times during 5 billion years, then on the average a civilization arises every ...
... In the Galaxy, we have1011 stars , or we would have 100,000 civilizations in the Galaxy by now. This is astonishing, especially if we say that these civilizations have arisen at random times during 5 billion years, then on the average a civilization arises every ...
Black Hole
... •There are many galaxies in the universe, and our Another galaxy , The galaxy, the Milky Way Canis Major Dwarf, was found by German galaxy, has many solar Astronomers on November systems and planets in it. 10, 2010. This is currently the closest galaxy to our ...
... •There are many galaxies in the universe, and our Another galaxy , The galaxy, the Milky Way Canis Major Dwarf, was found by German galaxy, has many solar Astronomers on November systems and planets in it. 10, 2010. This is currently the closest galaxy to our ...
SigAssignment
... upper right star that helps make up the cup that would hold the water. (See Figure 1) Figure 1 ...
... upper right star that helps make up the cup that would hold the water. (See Figure 1) Figure 1 ...
Exoplanet Discoveries and the Fermi Paradox
... and their expected lifetimes. Drake concluded that the number of intelligent species in the galaxy was on the order of one thousand to 100 million, with the nearest being perhaps 80-800 light years away. With Drake’s numbers, it appeared that we should hear from the extraterrestrials rather soon; bu ...
... and their expected lifetimes. Drake concluded that the number of intelligent species in the galaxy was on the order of one thousand to 100 million, with the nearest being perhaps 80-800 light years away. With Drake’s numbers, it appeared that we should hear from the extraterrestrials rather soon; bu ...
astro20 chap27 - Las Positas College
... – need to remove fraction of binary stars ~ 0.5 – need to remove stars that don’t live long enough ( ~ 1 billion years : 0.5 – need to remove all stars whose zones are small enough so that a planet is not likely to orbit within ~ 0.2 - 0.3 – alltogether this should be ~ 0.1 ...
... – need to remove fraction of binary stars ~ 0.5 – need to remove stars that don’t live long enough ( ~ 1 billion years : 0.5 – need to remove all stars whose zones are small enough so that a planet is not likely to orbit within ~ 0.2 - 0.3 – alltogether this should be ~ 0.1 ...
Two-Body, Central Force Problems
... U(r). In the case of two stars, for example, neither one orbits the other, but rather they orbit their common center of mass. Nevertheless, we can treat the problem AS IF a single star of reduced mass m were orbiting at a distance r = |r1 - r2| from the other, fixed (unmoving) star. And note that EI ...
... U(r). In the case of two stars, for example, neither one orbits the other, but rather they orbit their common center of mass. Nevertheless, we can treat the problem AS IF a single star of reduced mass m were orbiting at a distance r = |r1 - r2| from the other, fixed (unmoving) star. And note that EI ...
File
... water. This notion was advanced by the biologists James Lovelock and Lynn Margulis in the 1970s and is referred to as the Gaia hypothesis. This influential, yet controversial idea requires that the mixture of species on Earth at any moment acts as a collective organism that continuously (yet unwitti ...
... water. This notion was advanced by the biologists James Lovelock and Lynn Margulis in the 1970s and is referred to as the Gaia hypothesis. This influential, yet controversial idea requires that the mixture of species on Earth at any moment acts as a collective organism that continuously (yet unwitti ...
Life on Billions of Planets
... Nobody knows where the cutoff might be between smaller, rocky worlds and larger, Neptunelike planets, but it might well be smack in the middle of the super-Earth range. A super-Earth known as GJ 1214b, discovered in another M-dwarf survey, is 2.7 times the size of our planet and is almost certainly ...
... Nobody knows where the cutoff might be between smaller, rocky worlds and larger, Neptunelike planets, but it might well be smack in the middle of the super-Earth range. A super-Earth known as GJ 1214b, discovered in another M-dwarf survey, is 2.7 times the size of our planet and is almost certainly ...
Goal: To understand life in our universe.
... • Lets suppose we sent a craft to the alpha Centauri system at a speed of 0.1 c. • It would take 43 years to get there… • The large distances make interplanetary travel unlikely for a long time – and even then very impractical. ...
... • Lets suppose we sent a craft to the alpha Centauri system at a speed of 0.1 c. • It would take 43 years to get there… • The large distances make interplanetary travel unlikely for a long time – and even then very impractical. ...
