... groups. The creation of a new species from a pre-existing species – “speciation” as it is called - generally requires thousands of years. Hence, in our entire lifetime we can witness only a tiny part of the speciation process. How is it possible for one species to give rise to more than one subseque ...
ppt
... recession velocities of external galaxies to their distance • The more distant objects are receding more rapidly than closer ones seems to imply expansion of the universe, and is the main observation which led to the Big Bang theory ...
... recession velocities of external galaxies to their distance • The more distant objects are receding more rapidly than closer ones seems to imply expansion of the universe, and is the main observation which led to the Big Bang theory ...
Measuring Distances - Stockton University
... Type Ia Supernovae • A certain type of exploding star called a Type Ia supernova appears to follow a fairly consistent light-curve, peaking at an absolute magnitude of about Mv -19. This makes them 23.8 magnitudes more luminous than the Sun, equivalent to a factor of 1023.8/2.5 = 3.3 x 109 . • Th ...
... Type Ia Supernovae • A certain type of exploding star called a Type Ia supernova appears to follow a fairly consistent light-curve, peaking at an absolute magnitude of about Mv -19. This makes them 23.8 magnitudes more luminous than the Sun, equivalent to a factor of 1023.8/2.5 = 3.3 x 109 . • Th ...
Red Shift - The General Science Journal
... throughout space. That view includes universal expansion and the big bang. There are many questions uncertainties and issues concerning the correctness of these views. Is a different perspective in order? This chapter redefines cosmological redshift, its cause and the surrounding issues and concepts ...
... throughout space. That view includes universal expansion and the big bang. There are many questions uncertainties and issues concerning the correctness of these views. Is a different perspective in order? This chapter redefines cosmological redshift, its cause and the surrounding issues and concepts ...
![Lecture 15.Dark.Matter.Dark.Energy [Autosaved]](http://s1.studyres.com/store/data/001653481_1-24d181abb7aa2350426c5e71bf17efb8-300x300.png)
Lecture 15.Dark.Matter.Dark.Energy [Autosaved]
... rapid expansion of the universe just a tiny fraction of a second after the Big Bang 13.8 billion years ago. A key piece of the discovery is the evidence of gravitational waves, a long-sought cosmic phenomenon that has eluded astronomers until now. ...
... rapid expansion of the universe just a tiny fraction of a second after the Big Bang 13.8 billion years ago. A key piece of the discovery is the evidence of gravitational waves, a long-sought cosmic phenomenon that has eluded astronomers until now. ...
Description
... SCI109 -- The Cosmos is an introductory cosmology and astronomy course for all science and non-science majors. The course introduces basic principles and laws in physics and astronomy, scientific methods and instruments used in the exploration of the origin and structure of our universe, star format ...
... SCI109 -- The Cosmos is an introductory cosmology and astronomy course for all science and non-science majors. The course introduces basic principles and laws in physics and astronomy, scientific methods and instruments used in the exploration of the origin and structure of our universe, star format ...
Repulsive Force Proportional to Energy Density
... We showed how the X-particle variables (m, l, mo , lo ) can be obtained from w and ρ. For ΛCDM form, cosmological data is in good agreement with a variety of recent observations, and a model of X-particles with l and m is expected to work well. However, for quintessence form, since no real evidence ...
... We showed how the X-particle variables (m, l, mo , lo ) can be obtained from w and ρ. For ΛCDM form, cosmological data is in good agreement with a variety of recent observations, and a model of X-particles with l and m is expected to work well. However, for quintessence form, since no real evidence ...
speech on dark matter
... anything through my lectures and reading, it is that there are STILL some major problems with our comprehension of the universe that we exist in. Before my studies I (somewhat naively perhaps) assumed that after the existence and findings of great minds such as Aristotle, Galileo, and Einstein, that ...
... anything through my lectures and reading, it is that there are STILL some major problems with our comprehension of the universe that we exist in. Before my studies I (somewhat naively perhaps) assumed that after the existence and findings of great minds such as Aristotle, Galileo, and Einstein, that ...
Chapter 9 / Adobe Acrobat Document
... to those aboard the shuttle—seven astronauts died during the Challenger launch disaster and another seven astronauts died when Columbia broke up on re-entry. 28. Hubble and Humason’s distance-redshift relationship: the universe’s expansion has been confirmed by observations at very large distances a ...
... to those aboard the shuttle—seven astronauts died during the Challenger launch disaster and another seven astronauts died when Columbia broke up on re-entry. 28. Hubble and Humason’s distance-redshift relationship: the universe’s expansion has been confirmed by observations at very large distances a ...
Record: 1 Will dark energy TEAR the universe apart? Page 1 of 8
... A standard candle is a type of object that has a certain intrinsic brightness. Therefore, how bright the object appears depends on your distance from it. Think of automobile headlights. You can estimate how far away you are from a car depending on how bright the headlights appear. Hubble used a type ...
... A standard candle is a type of object that has a certain intrinsic brightness. Therefore, how bright the object appears depends on your distance from it. Think of automobile headlights. You can estimate how far away you are from a car depending on how bright the headlights appear. Hubble used a type ...
The Galaxies
... For a creature living on the sphere, having no sense of the third dimension, there’s no center (on the sphere!): All points are equal. Alternative: Any point on the surface can be defined as the center of a coordinate system. ...
... For a creature living on the sphere, having no sense of the third dimension, there’s no center (on the sphere!): All points are equal. Alternative: Any point on the surface can be defined as the center of a coordinate system. ...
The Hubble Space Telescope
... telling us a great deal about the chemical evolution of the Universe. Even more exciting are the discoveries that were totally unanticipated and that have opened new avenues to our knowledge of the cosmos, such as the discovery of the acceleration of the Universe, which implies the existence of the ...
... telling us a great deal about the chemical evolution of the Universe. Even more exciting are the discoveries that were totally unanticipated and that have opened new avenues to our knowledge of the cosmos, such as the discovery of the acceleration of the Universe, which implies the existence of the ...
Chapter 17
... The central black hole The center of Since we are located in the outer part of the galaxy, dust between the the galaxy stars blocks out much of the visible light coming from objects in the disk. Because of this, astronomers use infrared and radio telescopes to study our galaxy. They have learned tha ...
... The central black hole The center of Since we are located in the outer part of the galaxy, dust between the the galaxy stars blocks out much of the visible light coming from objects in the disk. Because of this, astronomers use infrared and radio telescopes to study our galaxy. They have learned tha ...
COMPONENTS OF THE UNIVERSE
... • On the H-R diagram, stars are plotted along the bottom axis by increasing surface temperature, which is measured in units called kelvins (K). (To convert a measurement in kelvins to degrees Celsius, subtract 273 from the kelvin measurement.) Hotter stars are plotted on the left of the diagram, and ...
... • On the H-R diagram, stars are plotted along the bottom axis by increasing surface temperature, which is measured in units called kelvins (K). (To convert a measurement in kelvins to degrees Celsius, subtract 273 from the kelvin measurement.) Hotter stars are plotted on the left of the diagram, and ...
The Search for the Earliest Galaxies
... the gas clouds within them became too hot to collapse and form stars. Only after the clouds cooled could small galaxies resume their normal star-making activities. ...
... the gas clouds within them became too hot to collapse and form stars. Only after the clouds cooled could small galaxies resume their normal star-making activities. ...
Astronomical Distance Ladder
... years. According to Edwin Hubble the universe we live in is expanding and everything is expanding uniformly. The larger the distance between galaxies the faster they are moving apart. This distance to a far away galaxy (D) is determined by using the Hubble constant (Ho) and the recession velocity of ...
... years. According to Edwin Hubble the universe we live in is expanding and everything is expanding uniformly. The larger the distance between galaxies the faster they are moving apart. This distance to a far away galaxy (D) is determined by using the Hubble constant (Ho) and the recession velocity of ...
Q1. Describe, in as much detail as you can: • the evidence that the
... Satellites fitted with various telescopes orbit the Earth. These telescopes detect different types of electromagnetic radiation. Why are telescopes that detect different types of electromagnetic waves used to observe the Universe? ...
... Satellites fitted with various telescopes orbit the Earth. These telescopes detect different types of electromagnetic radiation. Why are telescopes that detect different types of electromagnetic waves used to observe the Universe? ...
COMING EVENTS The Pluto Files Volume 37 Number 03 March
... There’s an argument to be made for the different orientations of the charts and of the images. The orientation of the sky through a telescope and the orientation of the sky on a star map are usually different. Be aware of this and when you’re comparing the chart to the image take this into account. ...
... There’s an argument to be made for the different orientations of the charts and of the images. The orientation of the sky through a telescope and the orientation of the sky on a star map are usually different. Be aware of this and when you’re comparing the chart to the image take this into account. ...
Tragedy vs. Hope: What Future in an Open Universe?
... limit the prognostic capabilities of science. What lies ahead is not yet determined and will be decided only later. Whether this openness is intrinsic or follows necessarily from the ever-limited accuracy of measurement would make no difference in practice. The future is open. ...
... limit the prognostic capabilities of science. What lies ahead is not yet determined and will be decided only later. Whether this openness is intrinsic or follows necessarily from the ever-limited accuracy of measurement would make no difference in practice. The future is open. ...
Expanding Universe and Big Bang
... from 1912, made a series of astounding measurements which showed galaxies racing around the universe. The Andromeda galaxy was racing towards us at 300 km/s; but almost every other galaxy was racing away from the Milky Way. Slipher’s work would turn out to be vital evidence for the Big Bang theory. ...
... from 1912, made a series of astounding measurements which showed galaxies racing around the universe. The Andromeda galaxy was racing towards us at 300 km/s; but almost every other galaxy was racing away from the Milky Way. Slipher’s work would turn out to be vital evidence for the Big Bang theory. ...
IS AN ALTERNATE COSMOLOGY BECOMING NECESSARY?
... must see many millions of them, but instead there are a paltry few. Merging could be possible but it is likely to take trillions of years for two galaxies to complete the merger. This amount of time cannot be accepted so they are modeled to happen quickly. Galaxy collisions do occur infrequently and ...
... must see many millions of them, but instead there are a paltry few. Merging could be possible but it is likely to take trillions of years for two galaxies to complete the merger. This amount of time cannot be accepted so they are modeled to happen quickly. Galaxy collisions do occur infrequently and ...
Dark Matter and Dark Energy - Trans
... Direct detection experiments for WIMPs are underway, and are waiting for interactions indicative of the dark matter particles. As the earth moves relative to the galaxy, the dark matter of the galaxy will pass through each cubic centimeter of the earth at a rate of about one hundred thousand particl ...
... Direct detection experiments for WIMPs are underway, and are waiting for interactions indicative of the dark matter particles. As the earth moves relative to the galaxy, the dark matter of the galaxy will pass through each cubic centimeter of the earth at a rate of about one hundred thousand particl ...
Chapter 6 The inflationary universe In this chapter, we encounter a
... Guth immediately realised that the real significance of his work was that an exponentially expanding universe could have major implications for several cosmological puzzles, as we have seen. ...
... Guth immediately realised that the real significance of his work was that an exponentially expanding universe could have major implications for several cosmological puzzles, as we have seen. ...
PowerPoint - Physics and Astronomy
... occurs on their a) globular cluster stars. b) giant molecular clouds. c) central bulge stars. d) open clusters. e) disk stars. ...
... occurs on their a) globular cluster stars. b) giant molecular clouds. c) central bulge stars. d) open clusters. e) disk stars. ...