The Adventures of π-Man: Measuring the Universe
... expansion of the universe will slow down and eventually reverse. If the curvature of space is negative, then the universe is infinite and its expansion will continue unimpeded forever. If the universe is Euclidean (curvature = 0), then the universe will also continue to expand, but at an ever-slowin ...
... expansion of the universe will slow down and eventually reverse. If the curvature of space is negative, then the universe is infinite and its expansion will continue unimpeded forever. If the universe is Euclidean (curvature = 0), then the universe will also continue to expand, but at an ever-slowin ...
Our Universe - E Natural Health Center
... predicts that the present universe should also be filled with neutrinos 微中子, fundamental particles with no mass or electric charge. The possibility exists that other relics from the early universe may eventually be discovered. ...
... predicts that the present universe should also be filled with neutrinos 微中子, fundamental particles with no mass or electric charge. The possibility exists that other relics from the early universe may eventually be discovered. ...
ppt
... • Protons and electrons have mass, charge • Also have angular momentum (spin) which creates tiny magnetic field • So energy of H atom is different depending on orientation of spins (if same ↓, if opposite directions ↑, but energy difference = 10-6 x electron orbits) • photon emitted in a spin-flip t ...
... • Protons and electrons have mass, charge • Also have angular momentum (spin) which creates tiny magnetic field • So energy of H atom is different depending on orientation of spins (if same ↓, if opposite directions ↑, but energy difference = 10-6 x electron orbits) • photon emitted in a spin-flip t ...
Hubble`s Law
... If the universe is indeed infinite, then there should be at least one star at every visible point in the sky lighting it up in all directions. Imagine standing at the center of a very thick forest: there is always a tree in your line of sight, regardless of what direction you are facing. If the univ ...
... If the universe is indeed infinite, then there should be at least one star at every visible point in the sky lighting it up in all directions. Imagine standing at the center of a very thick forest: there is always a tree in your line of sight, regardless of what direction you are facing. If the univ ...
Cosmic Objects – Cosmology – Study Guide
... 3. Quasar quasi-stellar radio source; very far, very bright, and strong radio source a. Blazar Galaxy energetic jets are aimed right at us 4. Brown Dwarf failed star; not large enough to generate nuclear fusion in core 5. Dark Energy repulsive force that is causing the universe to expand 6. Pulsar r ...
... 3. Quasar quasi-stellar radio source; very far, very bright, and strong radio source a. Blazar Galaxy energetic jets are aimed right at us 4. Brown Dwarf failed star; not large enough to generate nuclear fusion in core 5. Dark Energy repulsive force that is causing the universe to expand 6. Pulsar r ...
update : Feb.27,2014
... who did not want a non-eternal universe. Hoyle and others developed a Steady State Universe model to allow for expansion and still keep the universe eternal. ...
... who did not want a non-eternal universe. Hoyle and others developed a Steady State Universe model to allow for expansion and still keep the universe eternal. ...
There are billions of galaxies, many containing
... still do not know all the answers, evidence is beginning to accumulate and some of the possibilities, at least, can be eliminated. Some broad outlines become apparent from the dynamics of stars. Each galaxy must have started by the condensation of huge clouds of hydrogen, with particularly dense reg ...
... still do not know all the answers, evidence is beginning to accumulate and some of the possibilities, at least, can be eliminated. Some broad outlines become apparent from the dynamics of stars. Each galaxy must have started by the condensation of huge clouds of hydrogen, with particularly dense reg ...
Notes - SFA Physics and Astronomy
... Other forces can affect the size and exact timing of the tides. Most notable here are friction of the water with the ocean bottom and the shape of the continents. Since ocean tides are obviously present, Earth must also experience atmospheric and crustal tides. The tides of the atmosphere are larger ...
... Other forces can affect the size and exact timing of the tides. Most notable here are friction of the water with the ocean bottom and the shape of the continents. Since ocean tides are obviously present, Earth must also experience atmospheric and crustal tides. The tides of the atmosphere are larger ...
The Universe and Galaxies - West Jefferson Local Schools
... undetectable mass that adds to the gravity of a galaxy - Dark energy – theoretical energy that might be causing accelerated expansion of the universe ...
... undetectable mass that adds to the gravity of a galaxy - Dark energy – theoretical energy that might be causing accelerated expansion of the universe ...
Chapter 8, Lesson 5, pdf
... • Explain the big bang and the way in which Earth and its atmosphere were formed. ...
... • Explain the big bang and the way in which Earth and its atmosphere were formed. ...
Study Guide Astronomy
... 18. What stage of a low-mass or medium-mass star’s life is when it has no fuel left but it glows faintly? ...
... 18. What stage of a low-mass or medium-mass star’s life is when it has no fuel left but it glows faintly? ...
Galaxies
... Maybe there's matter out there that's blocking the energy from reaching us? Possibly, but in the end, that matter would heat up, and then it would radiate out energy, as per thermal radiation of a black body. The heat would reach us anyway. ...
... Maybe there's matter out there that's blocking the energy from reaching us? Possibly, but in the end, that matter would heat up, and then it would radiate out energy, as per thermal radiation of a black body. The heat would reach us anyway. ...
Formation of the Solar System
... also incorporates interstellar dust as an essential ingredient in the formation of the planets. This theory claims that the dust grains of the interstellar medium helped cool the nebular cloud by radiating heat away, and also acted as a foundation upon which atoms could attach. These properties of t ...
... also incorporates interstellar dust as an essential ingredient in the formation of the planets. This theory claims that the dust grains of the interstellar medium helped cool the nebular cloud by radiating heat away, and also acted as a foundation upon which atoms could attach. These properties of t ...
Astronomy 10B List of Concepts– by Chapter
... • Definitions (Cosmological principle, isotropic) • Giant elliptical galaxies and clusters • Distributions of galaxies, groups and clusters in space • Galactic evolution & collisions • How has star formation changed compared with 8 Byrs ago? ...
... • Definitions (Cosmological principle, isotropic) • Giant elliptical galaxies and clusters • Distributions of galaxies, groups and clusters in space • Galactic evolution & collisions • How has star formation changed compared with 8 Byrs ago? ...
Super Giant
... Because of the hugeness of space, it takes millions of years for the light given- off by the changes of stars and galaxies to reach us, therefore, these star may have burnt-out or exploded but we will not see if for millions of years. ...
... Because of the hugeness of space, it takes millions of years for the light given- off by the changes of stars and galaxies to reach us, therefore, these star may have burnt-out or exploded but we will not see if for millions of years. ...
The IR Universe
... Spitzer has found optically invisible galaxies so distant that we see them as they were only 3 billion years after the Big Bang. These galaxies are obscured by silicate dust, suggesting that planets could have formed even at this early time in the history of the Universe. ...
... Spitzer has found optically invisible galaxies so distant that we see them as they were only 3 billion years after the Big Bang. These galaxies are obscured by silicate dust, suggesting that planets could have formed even at this early time in the history of the Universe. ...
Watching Galaxies Form Near the Beginning of Time
... Distance and time are always mixed in astronomical observations. ...
... Distance and time are always mixed in astronomical observations. ...
Activity 1 - Galaxies
... The Big Bang Theory To explain Hubble’s extraordinary discoveries about our expanding universe, astronomers came up with the Big Bang Theory. The Big Bang theory states that the whole universe started from a single tiny point that expanded rapidly in an explosion about 13 Billion years ago and is s ...
... The Big Bang Theory To explain Hubble’s extraordinary discoveries about our expanding universe, astronomers came up with the Big Bang Theory. The Big Bang theory states that the whole universe started from a single tiny point that expanded rapidly in an explosion about 13 Billion years ago and is s ...
ASTR 100 - College of San Mateo
... lecture in the planetarium. These lectures are in Powerpoint format and uploaded to the instructor's website, for easy access by the student. CSM 's GOTO HYBRID star projector is used extensively and enables students to see the effects of precession, diurnal motion, lunar phases and the effect of on ...
... lecture in the planetarium. These lectures are in Powerpoint format and uploaded to the instructor's website, for easy access by the student. CSM 's GOTO HYBRID star projector is used extensively and enables students to see the effects of precession, diurnal motion, lunar phases and the effect of on ...
To Infinity….and Beyond!!!
... students are allowed to work in groups, in some cases as a class, to solve the problems. Part3: Students can be assigned an object in space to carry outside. Students should note the size of each object before being distributed to the students. Some type of marker (example: orange cones) should be p ...
... students are allowed to work in groups, in some cases as a class, to solve the problems. Part3: Students can be assigned an object in space to carry outside. Students should note the size of each object before being distributed to the students. Some type of marker (example: orange cones) should be p ...
Final Exam Practice Part I
... 7. What is Nuclear Fusion? 8. How does nuclear fusion produce energy? 9. Nuclear fusion can only occur in the center of the solar system. Why is that? 10. What would happen to the orbit of a planet if it suddenly started orbiting faster? 11. As a new star is born, what type of atoms first begin to f ...
... 7. What is Nuclear Fusion? 8. How does nuclear fusion produce energy? 9. Nuclear fusion can only occur in the center of the solar system. Why is that? 10. What would happen to the orbit of a planet if it suddenly started orbiting faster? 11. As a new star is born, what type of atoms first begin to f ...
cos1+2+3
... – the Milky Way and Andromeda are moving toward each other, – the Local Group is falling into the middle of the Virgo cluster, and ...
... – the Milky Way and Andromeda are moving toward each other, – the Local Group is falling into the middle of the Virgo cluster, and ...
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.