PHY320 Glossary of Terms - The University of Sheffield
... calculated curves have been verified both from laboratory experiments and stellar observations. Doppler Broadening is the broadening of spectral lines due to the motion of emitting or absorbing atoms. It is important that this effect is taken into account when using the spectra of stars to estimate ...
... calculated curves have been verified both from laboratory experiments and stellar observations. Doppler Broadening is the broadening of spectral lines due to the motion of emitting or absorbing atoms. It is important that this effect is taken into account when using the spectra of stars to estimate ...
GRADE 12A: Physics 7
... • The Milky Way is a spiral galaxy, and the Sun lies about two-thirds of the way out from the centre. • The nearest major galaxy to the Milky Way is the Andromeda galaxy (Andromeda nebula), which is also a spiral. • Even the nearest galaxy lies at a distance of a few million light-years. Light reach ...
... • The Milky Way is a spiral galaxy, and the Sun lies about two-thirds of the way out from the centre. • The nearest major galaxy to the Milky Way is the Andromeda galaxy (Andromeda nebula), which is also a spiral. • Even the nearest galaxy lies at a distance of a few million light-years. Light reach ...
Gravity in Einstein`s Universe
... How do things move?…. Newton built on Galileo’s work and proposed 3 laws of motion: ...
... How do things move?…. Newton built on Galileo’s work and proposed 3 laws of motion: ...
Syllabus - University of Texas Rio Grande Valley
... study stars and galaxies. Topics include: our Sun; star types, properties and evolution; our Milky Way Galaxy; galaxies types and general properties; Hubble’s Law; the expansion of the Universe; the Big Bang Model. Prerequisite: ASTR 1402 or ASTR 2301 Student Learning Outcomes, Core Curriculum, and ...
... study stars and galaxies. Topics include: our Sun; star types, properties and evolution; our Milky Way Galaxy; galaxies types and general properties; Hubble’s Law; the expansion of the Universe; the Big Bang Model. Prerequisite: ASTR 1402 or ASTR 2301 Student Learning Outcomes, Core Curriculum, and ...
young science communicator`s competition
... be 300 000 light years acrossNARRATOR: [Interrupting] May I remind the audience that a light year is a distance measure astronomers use, being the distance light travels in one year. One light year is ten trillion kilometres, making 300 000 light years an enormous distance! If Shapley's estimate is ...
... be 300 000 light years acrossNARRATOR: [Interrupting] May I remind the audience that a light year is a distance measure astronomers use, being the distance light travels in one year. One light year is ten trillion kilometres, making 300 000 light years an enormous distance! If Shapley's estimate is ...
Expanding Earth and Static Universe: Two Papers of 1935
... Remarkably, Edwin Hubble largely shared the cautious agnosticism expressed by Plaskett. In his influential The Realm of the Universe, Hubble (1936, p. 122) wrote, “judgement may be suspended until it is known from observations whether or not red-shifts do actually represent motion.” The first and mo ...
... Remarkably, Edwin Hubble largely shared the cautious agnosticism expressed by Plaskett. In his influential The Realm of the Universe, Hubble (1936, p. 122) wrote, “judgement may be suspended until it is known from observations whether or not red-shifts do actually represent motion.” The first and mo ...
Stars and Galaxies
... The Big Bang theory predicts that these light elements should have been fused from protons and neutrons in the first few minutes after the Big Bang. ...
... The Big Bang theory predicts that these light elements should have been fused from protons and neutrons in the first few minutes after the Big Bang. ...
Fulltext PDF
... Einstein was motivated by two seemingly simple observations. First, as Galileo demonstrated through his famous experiments at the leaning tower of Pisa, the effect of gravity is universal: all bodies fall the same way if the only force on them is gravitational. Second, gravity is always attractive. ...
... Einstein was motivated by two seemingly simple observations. First, as Galileo demonstrated through his famous experiments at the leaning tower of Pisa, the effect of gravity is universal: all bodies fall the same way if the only force on them is gravitational. Second, gravity is always attractive. ...
Integrative Studies 410 Our Place in the Universe
... • Edwin Hubble identified single stars in the Andromeda nebula (“turning” it into a galaxy) • Measured the distance to Andromeda to be 1 million Ly (modern value: 2.2 mill. Ly) • Conclusion: it is 20 times more distant than the milky way’s radius Extragalacticity! ...
... • Edwin Hubble identified single stars in the Andromeda nebula (“turning” it into a galaxy) • Measured the distance to Andromeda to be 1 million Ly (modern value: 2.2 mill. Ly) • Conclusion: it is 20 times more distant than the milky way’s radius Extragalacticity! ...
Andromeda Nebula Lies Outside Milky Way Galaxy
... In 1922, Soviet scientist Alexander Friedman developed his own solutions to the general relativity equations. He described two possibilities for the Universe: either it was expanding or contracting, but it was not staying the same. Abbe George Lemaître, a Catholic priest and astronomer released a pa ...
... In 1922, Soviet scientist Alexander Friedman developed his own solutions to the general relativity equations. He described two possibilities for the Universe: either it was expanding or contracting, but it was not staying the same. Abbe George Lemaître, a Catholic priest and astronomer released a pa ...
Lecture 7
... The arrangement of walls and voids on the largest scales is reminiscent of a bubble-like or “frothy” structure. The pattern of superclusters, walls, and voids is called large-scale structure (LSS). On still larger scales, the Universe seems to be uniform. The “end of greatness” has been reached. 4) ...
... The arrangement of walls and voids on the largest scales is reminiscent of a bubble-like or “frothy” structure. The pattern of superclusters, walls, and voids is called large-scale structure (LSS). On still larger scales, the Universe seems to be uniform. The “end of greatness” has been reached. 4) ...
Slide 1
... No. For K and M stars to account for the mass, they would have to be more common than we have seen with the HST. Brown dwarfs would have to be even more common. Interstellar dust and gas? No and no. While often difficult to detect in visible wavelengths, these are not hidden from resourceful astrono ...
... No. For K and M stars to account for the mass, they would have to be more common than we have seen with the HST. Brown dwarfs would have to be even more common. Interstellar dust and gas? No and no. While often difficult to detect in visible wavelengths, these are not hidden from resourceful astrono ...
ppt
... Tangential velocity profiles of spiral galaxies; G-E field vs CDM Comprehensive observations of spiral galaxies show that, after an initial rise, related roughly to the optical bulge, the tangential velocity commonly stays nearly constant out to well beyond the visible limit. A disk under Newtonian ...
... Tangential velocity profiles of spiral galaxies; G-E field vs CDM Comprehensive observations of spiral galaxies show that, after an initial rise, related roughly to the optical bulge, the tangential velocity commonly stays nearly constant out to well beyond the visible limit. A disk under Newtonian ...
Stars and Galaxies
... The Big Bang theory predicts that these light elements should have been fused from protons and neutrons in the first few minutes after the Big Bang. ...
... The Big Bang theory predicts that these light elements should have been fused from protons and neutrons in the first few minutes after the Big Bang. ...
Extension worksheet – Topic 6 - Cambridge Resources for the IB
... Spectroscopic parallax makes use of the formula so requires knowledge of luminosity and apparent brightness; apparent brightness can easily be measured with a CCD camera; the luminosity can be determined if we know the temperature of the star (obtained form its spectrum) and the stellar type so the ...
... Spectroscopic parallax makes use of the formula so requires knowledge of luminosity and apparent brightness; apparent brightness can easily be measured with a CCD camera; the luminosity can be determined if we know the temperature of the star (obtained form its spectrum) and the stellar type so the ...
Investigate Planets, Stars, Galaxies, and the Universe
... Activity: Planets, Stars, Galaxies, and the Universe To complete the jigsaw, have students return to their home groups to share their expert knowledge. Afterwards, you may wish to gather the class together and guide a class discussion, using questions such as: •W hat is a star? What are the charac ...
... Activity: Planets, Stars, Galaxies, and the Universe To complete the jigsaw, have students return to their home groups to share their expert knowledge. Afterwards, you may wish to gather the class together and guide a class discussion, using questions such as: •W hat is a star? What are the charac ...
Self-avoiding Random Walks and Olbers` Paradox - Serval
... length) then even if the Universe would have been infinite and would contain infinite number of stars the sky we see could look just as our night sky. The question arises if principles of self-avoiding walks that operate in case of polymer chains, for example, can be applied to “celestial mechanics”. ...
... length) then even if the Universe would have been infinite and would contain infinite number of stars the sky we see could look just as our night sky. The question arises if principles of self-avoiding walks that operate in case of polymer chains, for example, can be applied to “celestial mechanics”. ...
printer-friendly sample test questions
... 1st Item Specification: Recognize the red shift effect and know that the most distant objects have the greatest degree of red shift. Depth of Knowledge Level 1 1. The expansion of the universe was first deduced from A. Edwin Hubble showing that more distant galaxies are moving away more rapidly. B. ...
... 1st Item Specification: Recognize the red shift effect and know that the most distant objects have the greatest degree of red shift. Depth of Knowledge Level 1 1. The expansion of the universe was first deduced from A. Edwin Hubble showing that more distant galaxies are moving away more rapidly. B. ...
Think about the universe
... of gods, animals or familiar objects. The most wellknown constellations are the 12 groups we know as the signs of the zodiac. These constellations follow the ecliptic and their names include Taurus (the bull), Leo (the lion) and Sagittarius (the archer). You probably know the rest. If not, a discuss ...
... of gods, animals or familiar objects. The most wellknown constellations are the 12 groups we know as the signs of the zodiac. These constellations follow the ecliptic and their names include Taurus (the bull), Leo (the lion) and Sagittarius (the archer). You probably know the rest. If not, a discuss ...
Astronomy Talk July 2016 - Unitarian Universalist Church of
... Let this, then, be the ground of my faith: All that we know, now and forever, all scientific knowledge that we have of this world, or will ever have, is as an island in the sea [of mystery]…We live in our partial knowledge as the Dutch live on polders claimed from the sea. We dike and fill. We dredg ...
... Let this, then, be the ground of my faith: All that we know, now and forever, all scientific knowledge that we have of this world, or will ever have, is as an island in the sea [of mystery]…We live in our partial knowledge as the Dutch live on polders claimed from the sea. We dike and fill. We dredg ...
The First Stars in the Universe
... date from about a billion years after the big bang (assuming a present age for the universe of 13.7 billion years). Researchers will need better telescopes to see more distant objects dating from still earlier times. Cosmologists, however, can make deductions about the early universe based on the co ...
... date from about a billion years after the big bang (assuming a present age for the universe of 13.7 billion years). Researchers will need better telescopes to see more distant objects dating from still earlier times. Cosmologists, however, can make deductions about the early universe based on the co ...
Teaching Text Structure with Understanding the Scale of the Universe
... By 1920, many scientists began to think that some of the objects they were seeing must be other galaxies like the Milky Way but separate from the Milky Way. They spoke of these separate clusters of stars as island universes. ...
... By 1920, many scientists began to think that some of the objects they were seeing must be other galaxies like the Milky Way but separate from the Milky Way. They spoke of these separate clusters of stars as island universes. ...
After School Guide to Ology Astronomy
... astrophysics – The branch of astronomy that deals with the physics of astronomical objects and phenomena. Big Bang – An incredibly huge explosion that was the beginning of everything — time, space, and matter — and which occurred at some time between 13 and 14 billion years ago. According to current ...
... astrophysics – The branch of astronomy that deals with the physics of astronomical objects and phenomena. Big Bang – An incredibly huge explosion that was the beginning of everything — time, space, and matter — and which occurred at some time between 13 and 14 billion years ago. According to current ...
Galaxies
... • 1922-23. Observed Cepheid variable stars in a number of spiral “nebula” demonstrating they were far away and so galaxies • 1927-29 combined his distance measurements with redshift measurements of Slipher and Humason giving a measurement of the “Hubble Law” (though not the first…) PHYS 162 Lectur ...
... • 1922-23. Observed Cepheid variable stars in a number of spiral “nebula” demonstrating they were far away and so galaxies • 1927-29 combined his distance measurements with redshift measurements of Slipher and Humason giving a measurement of the “Hubble Law” (though not the first…) PHYS 162 Lectur ...
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.