Active Galactic Nuclei
... the empty space (due to the uncertainty principle). For the instant these particles exist, they would act as a repulsive force. But our estimate of this force is off by a factor of 10122. ...
... the empty space (due to the uncertainty principle). For the instant these particles exist, they would act as a repulsive force. But our estimate of this force is off by a factor of 10122. ...
Description
... There is no pre-requisite on the science background. Some multimedia online materials will be incorporated into our study. A non-graded pre-test will be required from each student at the beginning of the course. Course Objectives ...
... There is no pre-requisite on the science background. Some multimedia online materials will be incorporated into our study. A non-graded pre-test will be required from each student at the beginning of the course. Course Objectives ...
chapter 28 pages 747-752
... • 1. nebula- cloud of gas and dust • 2. Rotation causes formation of protostar • 3. Once it is hot enough for H to fuse into He, main sequence stage occurs • This is the longest stage of a stars life. • 4. In medium sized stars, once all H has been fused into He, He then starts to fuse into C during ...
... • 1. nebula- cloud of gas and dust • 2. Rotation causes formation of protostar • 3. Once it is hot enough for H to fuse into He, main sequence stage occurs • This is the longest stage of a stars life. • 4. In medium sized stars, once all H has been fused into He, He then starts to fuse into C during ...
The Sun and Beyond - Valhalla High School
... Can be classified according to the Hertzsprung-Russel Diagram (our sun is a typical star) Energy produced by the nuclear fusion of 2 hydrogen atoms to helium Takes 27 days to rotate ...
... Can be classified according to the Hertzsprung-Russel Diagram (our sun is a typical star) Energy produced by the nuclear fusion of 2 hydrogen atoms to helium Takes 27 days to rotate ...
Matter and Atoms
... The Universe is constantly expanding. How do we know? All galaxies are red shifted or moving away Finish what Hubble started, if the Universe is constantly expanding, rewind it, at one point the Universe must have ...
... The Universe is constantly expanding. How do we know? All galaxies are red shifted or moving away Finish what Hubble started, if the Universe is constantly expanding, rewind it, at one point the Universe must have ...
Post-class version
... are looking. • For example: in the Hubble Ultra Deep Field, very faint, distant galaxies are seen as they were fairly soon after they formed. ...
... are looking. • For example: in the Hubble Ultra Deep Field, very faint, distant galaxies are seen as they were fairly soon after they formed. ...
Chapter1.pdf
... view that the Earth was the most important place in the Universe and human beings the Universe’s most important creatures. (Also, at the time, most people believe the Earth was flat, not spherical, and that if you sailed on the ocean too far in one direction you would fall off the edge). • For the n ...
... view that the Earth was the most important place in the Universe and human beings the Universe’s most important creatures. (Also, at the time, most people believe the Earth was flat, not spherical, and that if you sailed on the ocean too far in one direction you would fall off the edge). • For the n ...
Astronomy 103 Final review session - Home | UW
... Expansion of universe • Edwin Hubble observed that galaxies are all moving away from us • We now know that this is due to the expansion of the universe • Hubble’s Law related recession velocity and distance ...
... Expansion of universe • Edwin Hubble observed that galaxies are all moving away from us • We now know that this is due to the expansion of the universe • Hubble’s Law related recession velocity and distance ...
The Observable Universe: Redshift, Distances and the Hubble-Law
... • Most of galaxies and all Quasars have redshifted Spectra (cosmological redshift, not gravitational). • Hubble found: cz = H0 d , z < 0,1. • The Hubble Constant has to be calibrated: Cepheids and SN-Methods are nowadays the most important Distance Indicators: H0 = 72+/-5 km/s/Mpc. • Hubble-Law can ...
... • Most of galaxies and all Quasars have redshifted Spectra (cosmological redshift, not gravitational). • Hubble found: cz = H0 d , z < 0,1. • The Hubble Constant has to be calibrated: Cepheids and SN-Methods are nowadays the most important Distance Indicators: H0 = 72+/-5 km/s/Mpc. • Hubble-Law can ...
Topic 3 – Waves and the Universe
... As already mentioned in earlier topics, most objects give out energy in all parts of the electromagnetic spectrum Modern telescopes can be designed to detect almost any part of the spectrum, showing us things that can’t be detected using visible light o E.g the Hubble Space Telescope has been in or ...
... As already mentioned in earlier topics, most objects give out energy in all parts of the electromagnetic spectrum Modern telescopes can be designed to detect almost any part of the spectrum, showing us things that can’t be detected using visible light o E.g the Hubble Space Telescope has been in or ...
Topic 3 notes - WordPress.com
... As already mentioned in earlier topics, most objects give out energy in all parts of the electromagnetic spectrum Modern telescopes can be designed to detect almost any part of the spectrum, showing us things that can’t be detected using visible light o E.g the Hubble Space Telescope has been in or ...
... As already mentioned in earlier topics, most objects give out energy in all parts of the electromagnetic spectrum Modern telescopes can be designed to detect almost any part of the spectrum, showing us things that can’t be detected using visible light o E.g the Hubble Space Telescope has been in or ...
Sample Exam 3
... C) The redshifts of nearby objects are not caused by the expansion of the universe. D) Stars don’t move, so we can’t measure a velocity for them. E) It can be used to find the distances of nearby stars. 22) Observations today suggest that spacetime in our universe is closest to being A) curved with ...
... C) The redshifts of nearby objects are not caused by the expansion of the universe. D) Stars don’t move, so we can’t measure a velocity for them. E) It can be used to find the distances of nearby stars. 22) Observations today suggest that spacetime in our universe is closest to being A) curved with ...
Life Cycle of Stars
... content, distance, shape, and brightness. He noticed that there were redshifts in the emission of light from many dimly lit galaxies and realized that these were moving away from each other at a rate constant to the distance between them. He used this to formulate Hubble's Law (1929) which helped as ...
... content, distance, shape, and brightness. He noticed that there were redshifts in the emission of light from many dimly lit galaxies and realized that these were moving away from each other at a rate constant to the distance between them. He used this to formulate Hubble's Law (1929) which helped as ...
Written in the stars THE NOBEL PRIZE IN PHYSICS 2011
... nor in ice. But there is no choice. If there is a cosmological constant, the expansion will continue to accelerate, even if the Universe is flat. This year’s Nobel Laureates expected to measure the cosmic deceleration, or how the expansion of the Universe is slowing. Their method was in principle th ...
... nor in ice. But there is no choice. If there is a cosmological constant, the expansion will continue to accelerate, even if the Universe is flat. This year’s Nobel Laureates expected to measure the cosmic deceleration, or how the expansion of the Universe is slowing. Their method was in principle th ...
OUR EARTH AND UNIVERSE --- WHERE WE LIVE (by Charles
... there are 60 seconds in a minute and 3,600 seconds in an hour. There are one million seconds in 12 days. There are one billion seconds in about 33 years. Our Earth rotates around a medium size star that we name the Sun. Our sun is 93 million miles for earth. Our moon was most likely formed when a gi ...
... there are 60 seconds in a minute and 3,600 seconds in an hour. There are one million seconds in 12 days. There are one billion seconds in about 33 years. Our Earth rotates around a medium size star that we name the Sun. Our sun is 93 million miles for earth. Our moon was most likely formed when a gi ...
Powerpoint for today
... even light hasn't had time to travel from A to B (only A to Earth), so A can know nothing about conditions at B, and vice versa. So why are A and B almost identical? This is “horizon problem”. ...
... even light hasn't had time to travel from A to B (only A to Earth), so A can know nothing about conditions at B, and vice versa. So why are A and B almost identical? This is “horizon problem”. ...
mass of star
... even light hasn't had time to travel from A to B (only A to Earth), so A can know nothing about conditions at B, and vice versa. So why are A and B almost identical? This is “horizon problem”. ...
... even light hasn't had time to travel from A to B (only A to Earth), so A can know nothing about conditions at B, and vice versa. So why are A and B almost identical? This is “horizon problem”. ...
t2 images part 1
... The rate at which galaxies are receding from each other is proportional to their distance from each other: v=H* d Where H is the Hubble Constant If the Universe is expanding, it stands that at some point in the past everything in the Universe was all concentrated at the same point and began ...
... The rate at which galaxies are receding from each other is proportional to their distance from each other: v=H* d Where H is the Hubble Constant If the Universe is expanding, it stands that at some point in the past everything in the Universe was all concentrated at the same point and began ...
Relativity
... • Only a person that is in a different frame of reference from the object would be able to detect the shrinking as far as the object is concerned, in its frame of reference, its size remains the same. ...
... • Only a person that is in a different frame of reference from the object would be able to detect the shrinking as far as the object is concerned, in its frame of reference, its size remains the same. ...
AV_Paper1_TheAgeOfTheUniverse
... “Since the beginning of time,” is a hackneyed phrase, attached with some arbitrary subject, that looks to exaggerate any issue its paired with. Although the use of the phrase highlights an individual’s vague grasp on the depth of time and use of uninspired hyperbole, one could find it surprising th ...
... “Since the beginning of time,” is a hackneyed phrase, attached with some arbitrary subject, that looks to exaggerate any issue its paired with. Although the use of the phrase highlights an individual’s vague grasp on the depth of time and use of uninspired hyperbole, one could find it surprising th ...
Galileo and Newton
... The Ptolemaic (a) and Copernican (b) systems both assumed that all orbits are circular. The fundamental difference is that Copernicus placed the Sun at the center. ...
... The Ptolemaic (a) and Copernican (b) systems both assumed that all orbits are circular. The fundamental difference is that Copernicus placed the Sun at the center. ...
P1 - Foundation
... The theory states that about 13.7 billion years ago all the matter in the Universe began to enlarge rapidly in a hot explosion, and it is still expanding today. Evidence for the Big Bang includes: • all the galaxies are moving away from us (red shift) • the further away a galaxy is, the faster it is ...
... The theory states that about 13.7 billion years ago all the matter in the Universe began to enlarge rapidly in a hot explosion, and it is still expanding today. Evidence for the Big Bang includes: • all the galaxies are moving away from us (red shift) • the further away a galaxy is, the faster it is ...
Physical cosmology
Physical cosmology is the study of the largest-scale structures and dynamics of the Universe and is concerned with fundamental questions about its origin, structure, evolution, and ultimate fate. For most of human history, it was a branch of metaphysics and religion. Cosmology as a science originated with the Copernican principle, which implies that celestial bodies obey identical physical laws to those on Earth, and Newtonian mechanics, which first allowed us to understand those physical laws.Physical cosmology, as it is now understood, began with the development in 1915 of Albert Einstein's general theory of relativity, followed by major observational discoveries in the 1920s: first, Edwin Hubble discovered that the universe contains a huge number of external galaxies beyond our own Milky Way; then, work by Vesto Slipher and others showed that the universe is expanding. These advances made it possible to speculate about the origin of the universe, and allowed the establishment of the Big Bang Theory, by Georges Lemaitre, as the leading cosmological model. A few researchers still advocate a handful of alternative cosmologies; however, most cosmologists agree that the Big Bang theory explains the observations better.Dramatic advances in observational cosmology since the 1990s, including the cosmic microwave background, distant supernovae and galaxy redshift surveys, have led to the development of a standard model of cosmology. This model requires the universe to contain large amounts of dark matter and dark energy whose nature is currently not well understood, but the model gives detailed predictions that are in excellent agreement with many diverse observations.Cosmology draws heavily on the work of many disparate areas of research in theoretical and applied physics. Areas relevant to cosmology include particle physics experiments and theory, theoretical and observational astrophysics, general relativity, quantum mechanics, and plasma physics.