Class notes 2 - University of Texas Astronomy
... Nearest star (at ~ 1.3 pc): Proxima Centauri, currently the nearest member of the triple system α Centauri. Other stars: ⎯ well spaced out; interstellar space is very empty. Mean distance between stars ~ 1 pc ~ 4 × 107 their radius (⇒ don't collide within lifetime of Galaxy, ~ 1010 years); ⎯ major ...
... Nearest star (at ~ 1.3 pc): Proxima Centauri, currently the nearest member of the triple system α Centauri. Other stars: ⎯ well spaced out; interstellar space is very empty. Mean distance between stars ~ 1 pc ~ 4 × 107 their radius (⇒ don't collide within lifetime of Galaxy, ~ 1010 years); ⎯ major ...
Teacher`s Guide Understanding: The Universe
... 1. Discuss why some scientists were uneasy about the idea of an expanding universe. 2. Astronomer Wendy Freedman's observations of Cepheid variable stars in another galaxy indicated that the age of the universe is about eight to twelve billion years. Why did her discovery cause such a debate among a ...
... 1. Discuss why some scientists were uneasy about the idea of an expanding universe. 2. Astronomer Wendy Freedman's observations of Cepheid variable stars in another galaxy indicated that the age of the universe is about eight to twelve billion years. Why did her discovery cause such a debate among a ...
Big bang galaxies stars Name: Date: 1. The diagram below
... on the passage below and on your knowledge of Earth science. Cosmic Microwave Background Radiation In the 1920s, Edwin Hubble's discovery of a pattern in the red shift of light from galaxies moving away from Earth led to the theory of an expanding universe. This expansion implies that the universe w ...
... on the passage below and on your knowledge of Earth science. Cosmic Microwave Background Radiation In the 1920s, Edwin Hubble's discovery of a pattern in the red shift of light from galaxies moving away from Earth led to the theory of an expanding universe. This expansion implies that the universe w ...
Earth apart.
... density could change over time or from one place to another in the universe. Vacuum energy gets its name from its role as the energy of "empty" space. Space is filled with a smooth energy density of virtual particles (particle-antiparticle pairs) that pop in and out of existence. Vacuum energy can b ...
... density could change over time or from one place to another in the universe. Vacuum energy gets its name from its role as the energy of "empty" space. Space is filled with a smooth energy density of virtual particles (particle-antiparticle pairs) that pop in and out of existence. Vacuum energy can b ...
PowerPoint Presentation - Super Massive Black Holes
... Later, it was found these sources could not be stars in our galaxy, but must be very far away --- as far as any of the distant galaxies seen. We now think these objects are the very bright centers of some distant galaxies, where some sort of energetic action is occurring. ...
... Later, it was found these sources could not be stars in our galaxy, but must be very far away --- as far as any of the distant galaxies seen. We now think these objects are the very bright centers of some distant galaxies, where some sort of energetic action is occurring. ...
Will Dark Energy Tear the Universe Apart?
... density could change over time or from one place to another in the universe. Vacuum energy gets its name from its role as the energy of "empty" space. Space is filled with a smooth energy density of virtual particles (particle-antiparticle pairs) that pop in and out of existence. Vacuum energy can b ...
... density could change over time or from one place to another in the universe. Vacuum energy gets its name from its role as the energy of "empty" space. Space is filled with a smooth energy density of virtual particles (particle-antiparticle pairs) that pop in and out of existence. Vacuum energy can b ...
PDF format
... fundamental forces are aspects of a more general force that became separate ("froze out") during the big bang? a) It can't be tested. b) They study far-away objects to see how forces behave at times early in the universe. c) Particle accelerators like Fermilab and the Large Hadron Collider have t ...
... fundamental forces are aspects of a more general force that became separate ("froze out") during the big bang? a) It can't be tested. b) They study far-away objects to see how forces behave at times early in the universe. c) Particle accelerators like Fermilab and the Large Hadron Collider have t ...
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. ...
Lesson Plan - eCUIP
... way astronomers viewed our place in the Universe, because it was then understood that our Milky Way Galaxy was but one of countless other galaxies. Then, in 1929, Hubble determined what is called “Hubble’s Law”, which proposes that the farther a galaxy is from Earth, the faster it appears to move aw ...
... way astronomers viewed our place in the Universe, because it was then understood that our Milky Way Galaxy was but one of countless other galaxies. Then, in 1929, Hubble determined what is called “Hubble’s Law”, which proposes that the farther a galaxy is from Earth, the faster it appears to move aw ...
Astronomy Notes: Deep Space
... http://planck.cf.ac.uk/files/images/PLANCK_FSM_03_Black_Regions_v02_B.preview.j pg ...
... http://planck.cf.ac.uk/files/images/PLANCK_FSM_03_Black_Regions_v02_B.preview.j pg ...
Slide 1
... “There are two ways of looking at the world – through faith and superstition or through the rigours of logic, observation and evidence – in other words, through reason. Reason and a respect for evidence are precious commodities, the source of human progress and our safeguard against fundamentalists ...
... “There are two ways of looking at the world – through faith and superstition or through the rigours of logic, observation and evidence – in other words, through reason. Reason and a respect for evidence are precious commodities, the source of human progress and our safeguard against fundamentalists ...
Unit 6: Space - Galena Park ISD
... The student is expected to model and describe how light years are used to measure distances and sizes in the universe. (8.8D) Light travels at 300,000 kilometers per second. This is known as the speed of light. It takes a ray of light about 8 minutes to go from the Sun to Earth. Because of the vast ...
... The student is expected to model and describe how light years are used to measure distances and sizes in the universe. (8.8D) Light travels at 300,000 kilometers per second. This is known as the speed of light. It takes a ray of light about 8 minutes to go from the Sun to Earth. Because of the vast ...
Physics - Content by Unit
... would explain the Big Bang and supernovae. Since galaxies are complex, distant objects, it is not surprising that astronomers did not immediately begin to worry about "the dark matter problem." By the early 1970s, technology, astronomy, and particle physics had advanced enough that the dark matter p ...
... would explain the Big Bang and supernovae. Since galaxies are complex, distant objects, it is not surprising that astronomers did not immediately begin to worry about "the dark matter problem." By the early 1970s, technology, astronomy, and particle physics had advanced enough that the dark matter p ...
Expanding Universe Lab
... The Hubble Law tells us that our Universe is expanding. We observe galaxies, find their distances and their velocities, and find that they are all moving away from us. The more distant the galaxy, the faster it is moving away. From this information, we can estimate the age of our Universe. We assume ...
... The Hubble Law tells us that our Universe is expanding. We observe galaxies, find their distances and their velocities, and find that they are all moving away from us. The more distant the galaxy, the faster it is moving away. From this information, we can estimate the age of our Universe. We assume ...
PDF version - Caltech Astronomy
... page 53.) It now appears that about 70% of the mass– energy of the Universe is accounted for by some unexplained “dark energy” that works against gravity on large scales, very much like L. An alternative view of this mysterious dark energy that calls it “quintessence,” presumes a temporal variabilit ...
... page 53.) It now appears that about 70% of the mass– energy of the Universe is accounted for by some unexplained “dark energy” that works against gravity on large scales, very much like L. An alternative view of this mysterious dark energy that calls it “quintessence,” presumes a temporal variabilit ...
BIO 10 Lecture 2
... explains the most facts and has the best predictive power) is that the Universe began with a Big Bang explosion ~ 13.7 billion years ago. •Time, space, and matter came into existence with this event •Since an act of creation implies space and time, most scientists do not believe it is even meaningfu ...
... explains the most facts and has the best predictive power) is that the Universe began with a Big Bang explosion ~ 13.7 billion years ago. •Time, space, and matter came into existence with this event •Since an act of creation implies space and time, most scientists do not believe it is even meaningfu ...
Grade 9 Unit 4: Space
... b. Describe the formation and life cycle of stars. (447-450) c. Compare some well known stars relative to our solar system. (Vega, Canopus, Sun, Arcturus, Betelgeuse, Rigel, and Delta Orionis) (450) ...
... b. Describe the formation and life cycle of stars. (447-450) c. Compare some well known stars relative to our solar system. (Vega, Canopus, Sun, Arcturus, Betelgeuse, Rigel, and Delta Orionis) (450) ...
ch16 b - Manasquan Public Schools
... premise that nothing but an “atom” existed before the Big Bang. ...
... premise that nothing but an “atom” existed before the Big Bang. ...
Lecture 5: Matter Dominated Universe: CMB Anisotropies and Large
... and Sunyaev-Zeldovich (Re-ionisation) effects. • From the CMB Power Spectrum, most cosmological parameters are determined to a few percent. This determines the redshifttime relationship, R( t ) = 1 + z( t ) . • Supercomputer simulations, with initial conditions from the CMB, tracking dark matter m ...
... and Sunyaev-Zeldovich (Re-ionisation) effects. • From the CMB Power Spectrum, most cosmological parameters are determined to a few percent. This determines the redshifttime relationship, R( t ) = 1 + z( t ) . • Supercomputer simulations, with initial conditions from the CMB, tracking dark matter m ...
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.