Lecture Notes
... tend to include all galaxy types. Both often have a giant elliptical galaxy (a so-called cD galaxy), ∼200 kpc in diameter, at the centre of the gravitational well. It is thought that the large number of ellipticals is due to galaxy mergers and a cD galaxy originates by devouring other galaxies. Evid ...
... tend to include all galaxy types. Both often have a giant elliptical galaxy (a so-called cD galaxy), ∼200 kpc in diameter, at the centre of the gravitational well. It is thought that the large number of ellipticals is due to galaxy mergers and a cD galaxy originates by devouring other galaxies. Evid ...
Chapter 4: Making Sense of the Universe
... At any given time, how many high tides are there on Earth? A. One B. Two C. There may be none or one, depending on what time of day D. None, one, or two– depending on the time of day ...
... At any given time, how many high tides are there on Earth? A. One B. Two C. There may be none or one, depending on what time of day D. None, one, or two– depending on the time of day ...
Let there be an astronomical body i that is an aggregate of a very
... arbitrarily large scales then the cosmological principle, which stipulates that the universe is homogeneous on the largest scales, may require modification [3]. It is important to note, however, that a fractal distribution of galaxies is not necessarily inconsistent with the cosmological principle i ...
... arbitrarily large scales then the cosmological principle, which stipulates that the universe is homogeneous on the largest scales, may require modification [3]. It is important to note, however, that a fractal distribution of galaxies is not necessarily inconsistent with the cosmological principle i ...
Astronomy Exam Notes.docx
... b. slower than c c. at speed c d. at a speed depending on their energy 2. Which of the following is not a result of gravity? a. the sun orbits the centre of the galaxy b. jupiter orbits the sun c. the earth orbits the sun d. an electron orbits the nucleus 3. Which of the following is not one of the ...
... b. slower than c c. at speed c d. at a speed depending on their energy 2. Which of the following is not a result of gravity? a. the sun orbits the centre of the galaxy b. jupiter orbits the sun c. the earth orbits the sun d. an electron orbits the nucleus 3. Which of the following is not one of the ...
Rebuts to the Bridgman Rebuttal
... MISREPRESENTATIONS OF WHAT I SAY On his page 4 Bridgman states: “Dr. Scott states that astronomers assume that the physical laws in the distant cosmos are different from those known on Earth (page 7).” What I did say in part was this: “The hypotheses of these plasma scientists on the subjects of sol ...
... MISREPRESENTATIONS OF WHAT I SAY On his page 4 Bridgman states: “Dr. Scott states that astronomers assume that the physical laws in the distant cosmos are different from those known on Earth (page 7).” What I did say in part was this: “The hypotheses of these plasma scientists on the subjects of sol ...
Shattering geocentric, anthrocentric worldviews since 1543
... All radioactivity is man-made. (False) Lasers work by focusing sound waves. (False) Electrons are smaller than atoms. (True) The universe began with a huge explosion. (True) The continents on which we live have been moving their location for millions of years and will continue to move in the future. ...
... All radioactivity is man-made. (False) Lasers work by focusing sound waves. (False) Electrons are smaller than atoms. (True) The universe began with a huge explosion. (True) The continents on which we live have been moving their location for millions of years and will continue to move in the future. ...
Where Does Helium Come from?
... gravity was able to precipitate out as the temperature dropped and subatomic particles (and their anti-particles) were able to form via a process called pair production. Pair production, explained in an overly simplistic way, is how matter was created directly from energy. To understand how pair pro ...
... gravity was able to precipitate out as the temperature dropped and subatomic particles (and their anti-particles) were able to form via a process called pair production. Pair production, explained in an overly simplistic way, is how matter was created directly from energy. To understand how pair pro ...
nucleosynthesis_oct28
... ionization equation of Saha. Her work was of fundamental importance in the development of the field of stellar atmospheres. She discovered that all stars have very similar relative chemical abundances with hydrogen and helium comprising 99% by number. ...
... ionization equation of Saha. Her work was of fundamental importance in the development of the field of stellar atmospheres. She discovered that all stars have very similar relative chemical abundances with hydrogen and helium comprising 99% by number. ...
The General Theory of Relativity The Special Theory of Relativity
... intuition told him that the principle of relativity could be extended to include non-inertial frames of reference, and by doing this, gravity would emerge as a natural property of space-time. Einstein set out almost immediately to develop this more general theory that would include non-inertial as w ...
... intuition told him that the principle of relativity could be extended to include non-inertial frames of reference, and by doing this, gravity would emerge as a natural property of space-time. Einstein set out almost immediately to develop this more general theory that would include non-inertial as w ...
notes
... Our galaxy, and our closest neighbour (Andromeda), are among this type. The Milky Way was thought to be an ordinary now it now seems we have a large bar near the nucleus where the spiral arms branch. Galaxies of this type have a large central bulge, expansive disks, and a halo. They have bright cent ...
... Our galaxy, and our closest neighbour (Andromeda), are among this type. The Milky Way was thought to be an ordinary now it now seems we have a large bar near the nucleus where the spiral arms branch. Galaxies of this type have a large central bulge, expansive disks, and a halo. They have bright cent ...
Galaxies 1) What are galaxies? 2) The birth of galaxies 3
... They don’t contain many star forming regions, as they have used the bulk of their stellar material early in their formation. The massive size of galaxies of this type can be attributed to several galactic mergers, an event prone to advancing star formation activity Spiral and Barred Spiral Galaxies: ...
... They don’t contain many star forming regions, as they have used the bulk of their stellar material early in their formation. The massive size of galaxies of this type can be attributed to several galactic mergers, an event prone to advancing star formation activity Spiral and Barred Spiral Galaxies: ...
- ORIGINS Space Telescope
... OST will utilize the unique power of the infrared fine-structure emission lines to trace the rise of metals from the first galaxies until today. The present day Universe is rich in metals heavier than helium that enable efficient cooling of gas in the ISM in order to form stars, create planets and m ...
... OST will utilize the unique power of the infrared fine-structure emission lines to trace the rise of metals from the first galaxies until today. The present day Universe is rich in metals heavier than helium that enable efficient cooling of gas in the ISM in order to form stars, create planets and m ...
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 ...
Name - MIT
... hasn’t life on Earth been destroyed? B) why have we not observed alien civilizations even though simple arguments would suggest that some of these civilizations ought to have spread throughout the galaxy by now? C) why hasn’t life evolved on Mars if it has evolved on Earth? D) why does a spiral gala ...
... hasn’t life on Earth been destroyed? B) why have we not observed alien civilizations even though simple arguments would suggest that some of these civilizations ought to have spread throughout the galaxy by now? C) why hasn’t life evolved on Mars if it has evolved on Earth? D) why does a spiral gala ...
Name
... 33) What happens if the density of the universe is above the critical density? A) the universe will stop expanding and start contracting B) the universe will continue expanding C) the universe will start forming more supernovas D) the universe will start forming more stars E) the universe will start ...
... 33) What happens if the density of the universe is above the critical density? A) the universe will stop expanding and start contracting B) the universe will continue expanding C) the universe will start forming more supernovas D) the universe will start forming more stars E) the universe will start ...
Name - MIT
... 33) What happens if the density of the universe is above the critical density? A) the universe will stop expanding and start contracting B) the universe will continue expanding C) the universe will start forming more supernovas D) the universe will start forming more stars E) the universe will start ...
... 33) What happens if the density of the universe is above the critical density? A) the universe will stop expanding and start contracting B) the universe will continue expanding C) the universe will start forming more supernovas D) the universe will start forming more stars E) the universe will start ...
The Law of Cause and Effect
... causality, reality, and unity would continue to unravel the remaining mysteries of physical entities and processes. But tragically, Niels Bohr, among others, led many physicists astray by abandoning the law of cause and effect. In 1913, Bohr proposed a model of the atom that polarized particle physi ...
... causality, reality, and unity would continue to unravel the remaining mysteries of physical entities and processes. But tragically, Niels Bohr, among others, led many physicists astray by abandoning the law of cause and effect. In 1913, Bohr proposed a model of the atom that polarized particle physi ...
Gravity - faculty.ucmerced.edu
... Black holes are not cosmic vacuum cleaners! You can have a stable orbit around a black hole (as long as you’re further than 3 times the Schwarzschild radius)! ...
... Black holes are not cosmic vacuum cleaners! You can have a stable orbit around a black hole (as long as you’re further than 3 times the Schwarzschild radius)! ...
The Milky Way and Dark Matter
... galaxies that astronomers observe. We didn't always know this. Up until the 1920's, astronomers thought that the Milky Way was the entire universe. We have learned that the Galaxy is a barred spiral galaxy, which means it looks a lot like a pinwheel with a bar at the center and several spiral arms c ...
... galaxies that astronomers observe. We didn't always know this. Up until the 1920's, astronomers thought that the Milky Way was the entire universe. We have learned that the Galaxy is a barred spiral galaxy, which means it looks a lot like a pinwheel with a bar at the center and several spiral arms c ...
Lecture 2 Astronomical Distances
... 5 mag = 100 x fainter = 10 x farther away 25 mag = 1010 x fainter = 105 x farther away Distance to a sun-like mV = +1 mag star: 8 x 105 light minutes = 1.5 light years ...
... 5 mag = 100 x fainter = 10 x farther away 25 mag = 1010 x fainter = 105 x farther away Distance to a sun-like mV = +1 mag star: 8 x 105 light minutes = 1.5 light years ...
NEB - 17 RECENT DEVELOPMENTS IN GRAVITY Book of Abstracts
... Quantum Gravity in the Sky: Interplay between fundamental theory and observations Observational missions have provided us with a reliable model of the evolution of the universe starting from the last scattering surface all the way to future infinnity. Furthermore given a specific model of inflation, ...
... Quantum Gravity in the Sky: Interplay between fundamental theory and observations Observational missions have provided us with a reliable model of the evolution of the universe starting from the last scattering surface all the way to future infinnity. Furthermore given a specific model of inflation, ...
Non-standard cosmology
A non-standard cosmology is any physical cosmological model of the universe that has been, or still is, proposed as an alternative to the Big Bang model of standard physical cosmology. In the history of cosmology, various scientists and researchers have disputed parts or all of the Big Bang due to a rejection or addition of fundamental assumptions needed to develop a theoretical model of the universe. From the 1940s to the 1960s, the astrophysical community was equally divided between supporters of the Big Bang theory and supporters of a rival steady state universe. It was not until advances in observational cosmology in the late 1960s that the Big Bang would eventually become the dominant theory, and today there are few active researchers who dispute it.The term non-standard is applied to any cosmological theory that does not conform to the scientific consensus, but is not used in describing alternative models where no consensus has been reached, and is also used to describe theories that accept a ""big bang"" occurred but differ as to the detailed physics of the origin and evolution of the universe. Because the term depends on the prevailing consensus, the meaning of the term changes over time. For example, hot dark matter would not have been considered non-standard in 1990, but would be in 2010. Conversely, a non-zero cosmological constant resulting in an accelerating universe would have been considered non-standard in 1990, but is part of the standard cosmology in 2010.