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... Light from stars can be analysed to find out if the star is moving towards us, away from us or is stationary relative to the Earth. Our Sun is stationary relative to the Earth. The spectral lines from our Sun and three other stars are shown below. ...
... Light from stars can be analysed to find out if the star is moving towards us, away from us or is stationary relative to the Earth. Our Sun is stationary relative to the Earth. The spectral lines from our Sun and three other stars are shown below. ...
The Universe
... occurred 13.7 billion years ago. First stars and galaxies formed 200 million years after big bang. Solar system formed 4.6 billion years ago. ...
... occurred 13.7 billion years ago. First stars and galaxies formed 200 million years after big bang. Solar system formed 4.6 billion years ago. ...
Slide 1
... Explanation: Analyses of a new high-resolution map of microwave light emitted only 380,000 years after the Big Bang appear to define our universe more precisely than ever before. The eagerly awaited results announced last year from the orbiting Wilkinson Microwave Anisotropy Probe resolve several lo ...
... Explanation: Analyses of a new high-resolution map of microwave light emitted only 380,000 years after the Big Bang appear to define our universe more precisely than ever before. The eagerly awaited results announced last year from the orbiting Wilkinson Microwave Anisotropy Probe resolve several lo ...
Excerpt from Aristotle`s “On the Heavens”
... some revolve fixedly with the whole heaven, always occupying the same positions. A belt is formed through their midst by the so-called Circle of the Zodiac, which passes crosswise through the tropics, being divided up into the twelve regions of the Signs of the Zodiac. Others, which are the planets, ...
... some revolve fixedly with the whole heaven, always occupying the same positions. A belt is formed through their midst by the so-called Circle of the Zodiac, which passes crosswise through the tropics, being divided up into the twelve regions of the Signs of the Zodiac. Others, which are the planets, ...
Page 25 - Types of Galaxies
... • Edwin Hubble classified galaxies into four major types: A) spiral B) barred spiral C) elliptical D) irregular • Most galaxies are spirals, barred spirals, or ellipticals. • Earth can be found in the Milky Way Galaxy, which is a spiral galaxy ...
... • Edwin Hubble classified galaxies into four major types: A) spiral B) barred spiral C) elliptical D) irregular • Most galaxies are spirals, barred spirals, or ellipticals. • Earth can be found in the Milky Way Galaxy, which is a spiral galaxy ...
Introduction to Galaxies and Cosmology Exercises 2
... b) What is the mass of the black hole if one assume it to radiate at 10% of its Eddinton luminosity? c) What is the Schwarzschild radius of the black hole? 9. (Challenging) A quasar emits two radiating clouds in our general direction at 13/14 the speed of light. They are first observed when they app ...
... b) What is the mass of the black hole if one assume it to radiate at 10% of its Eddinton luminosity? c) What is the Schwarzschild radius of the black hole? 9. (Challenging) A quasar emits two radiating clouds in our general direction at 13/14 the speed of light. They are first observed when they app ...
Physics - Content by Unit
... time less than an orbital period, most of the mass points would collapse to a bar-shaped, dense concentration close to the center of the galaxy with only a few mass points at larger radii. This looked nothing like the elegant spiral or elliptical shapes we are used to seeing. However, if they added ...
... time less than an orbital period, most of the mass points would collapse to a bar-shaped, dense concentration close to the center of the galaxy with only a few mass points at larger radii. This looked nothing like the elegant spiral or elliptical shapes we are used to seeing. However, if they added ...
lecture2_3
... •Study their motions, measure their speeds •Fundamental to understand the evolution of the sources and how their interact with each other (e.g. merging, collisions) •Measure their redshift, determine their distance from us •Fundamental to chart the large-scale structure of the Universe and to study ...
... •Study their motions, measure their speeds •Fundamental to understand the evolution of the sources and how their interact with each other (e.g. merging, collisions) •Measure their redshift, determine their distance from us •Fundamental to chart the large-scale structure of the Universe and to study ...
Unit 1
... • In the 1700’s, Charles Messier was observing comets, and kept finding objects that while fuzzy, were not comets – He made a list (or catalog) of these undesired ...
... • In the 1700’s, Charles Messier was observing comets, and kept finding objects that while fuzzy, were not comets – He made a list (or catalog) of these undesired ...
Exploring The Universe
... • Edwin Hubble divided all galaxies into three major types: spiral, elliptical, and irregular. • Most of the objects visible in the night sky are part of the Milky Way galaxy. • Scientists use astronomical data to piece together a picture of the Milky Way galaxy. ...
... • Edwin Hubble divided all galaxies into three major types: spiral, elliptical, and irregular. • Most of the objects visible in the night sky are part of the Milky Way galaxy. • Scientists use astronomical data to piece together a picture of the Milky Way galaxy. ...
Lesson Plan - eCUIP
... Introduction: Edwin Hubble made some of the most important discoveries in modern astronomy. In the 1920s, while working at the Mt. Wilson Observatory, he was able to show that some of the numerous distant, faint clouds of light in the universe were actually entire galaxies. This realization changed ...
... Introduction: Edwin Hubble made some of the most important discoveries in modern astronomy. In the 1920s, while working at the Mt. Wilson Observatory, he was able to show that some of the numerous distant, faint clouds of light in the universe were actually entire galaxies. This realization changed ...
Astronomical Distances
... or nearest galaxy, we always want to know how far away things are. But you may have noticed that there are several units of distance used at different times; this is usually related to how far away the object in question is. And if some of these distances don’t make your head hurt, then they should! ...
... or nearest galaxy, we always want to know how far away things are. But you may have noticed that there are several units of distance used at different times; this is usually related to how far away the object in question is. And if some of these distances don’t make your head hurt, then they should! ...
Document
... attract each other, gradually increasing in size. Eventually, the cluster begins to contract by virtue of its own gravity. The contraction continues till the core temperature has reached around 10 million degrees. when nuclear reaction can happen. The period up until this point is known as the "cont ...
... attract each other, gradually increasing in size. Eventually, the cluster begins to contract by virtue of its own gravity. The contraction continues till the core temperature has reached around 10 million degrees. when nuclear reaction can happen. The period up until this point is known as the "cont ...
astronomy webquest…… explore the universe
... A teaspoon of material from a neuron star can weigh about _____________________. Stars are made mainly from the gases _____________ and ______________. Describe the stages of a star’s life cycle in the correct order. ...
... A teaspoon of material from a neuron star can weigh about _____________________. Stars are made mainly from the gases _____________ and ______________. Describe the stages of a star’s life cycle in the correct order. ...
Return both exam and scantron sheet when you
... 11. Once the hydrogen in the Sun’s core is fused into helium, further fusion of hydrogen into helium will go on in (a) the photosphere. (b) a shell surrounding the helium core. (c) the convection zone. 12. Planetary nebula is (a) a supernova remnant. (b) a nebula in which planets form around a star. ...
... 11. Once the hydrogen in the Sun’s core is fused into helium, further fusion of hydrogen into helium will go on in (a) the photosphere. (b) a shell surrounding the helium core. (c) the convection zone. 12. Planetary nebula is (a) a supernova remnant. (b) a nebula in which planets form around a star. ...
Standard EPS Shell Presentation
... Identify the conditions necessary for fusion to occur inside a star. Describe the information that spectroscopy provides about stars. Relate the color of a star to its temperature. Explain the factors that determine the brightness of a star in the sky. Discuss the importance of the H-R diagram to as ...
... Identify the conditions necessary for fusion to occur inside a star. Describe the information that spectroscopy provides about stars. Relate the color of a star to its temperature. Explain the factors that determine the brightness of a star in the sky. Discuss the importance of the H-R diagram to as ...
Extragalactic AO Science
... Sensitivity increases rapidly with Strehl for point sources, but extended targets gain much less. AO systems produce additional background in Near-IR and reduce throughput further making it difficult to observe faint extended sources. Normal galaxy disks only achieve a maximum SB of K~16 mag/sq arcs ...
... Sensitivity increases rapidly with Strehl for point sources, but extended targets gain much less. AO systems produce additional background in Near-IR and reduce throughput further making it difficult to observe faint extended sources. Normal galaxy disks only achieve a maximum SB of K~16 mag/sq arcs ...
Lecture 7
... another important clue to Hubble types because galaxies collide in dense regions. 6) Computer simulations show what happens when disks collide. The collisions are “sticky,” and the galaxies merge unless they fly past one another very fast. The disks get completely disrupted, and the stars are thrown ...
... another important clue to Hubble types because galaxies collide in dense regions. 6) Computer simulations show what happens when disks collide. The collisions are “sticky,” and the galaxies merge unless they fly past one another very fast. The disks get completely disrupted, and the stars are thrown ...
12/08/14-- Student ID ______ TA Name
... 38. The astrophysicists in “The Runaway Universe” video had been granted observation time on some of the best telescopes in the world. What was the original goal of their research and what kind of surprise did they find? a. to view the cosmic microwave background radiation; it was primarily gamma r ...
... 38. The astrophysicists in “The Runaway Universe” video had been granted observation time on some of the best telescopes in the world. What was the original goal of their research and what kind of surprise did they find? a. to view the cosmic microwave background radiation; it was primarily gamma r ...
d Transparent Deception In yet Another Alleged Extra
... some 50 Light Years distant, (...right at our elbows in astronomy speak). So, now we determine the distance involved in 50 Light Years, i.e., 50 x 5,875,000,000,000 and find that it equals c. 293,750,000,000,000 miles. That is almost 300 trillion miles. One trillion is 1000 x 1,000,000,000. Since we ...
... some 50 Light Years distant, (...right at our elbows in astronomy speak). So, now we determine the distance involved in 50 Light Years, i.e., 50 x 5,875,000,000,000 and find that it equals c. 293,750,000,000,000 miles. That is almost 300 trillion miles. One trillion is 1000 x 1,000,000,000. Since we ...
hubble amazing universe worksheet
... green is ___________________. 8. This region is _____________ light years across! 9. Hubble even showed a star about to die! As a star runs out of ______________, it expands, and it is released into space. 10. Someday, our own star will expand and engulf the earth. Luckily, this will happen in _____ ...
... green is ___________________. 8. This region is _____________ light years across! 9. Hubble even showed a star about to die! As a star runs out of ______________, it expands, and it is released into space. 10. Someday, our own star will expand and engulf the earth. Luckily, this will happen in _____ ...
Press release - ASTRONOMY GROUP – University of St Andrews
... He explained, “These Cepheids stars which get brighter and fainter by some tens of percent every ten to a hundred days are mostly understood. But recently it has become clear that our theories of what happens in the outer layers of these stars which cause the variations in brightness do not totally ...
... He explained, “These Cepheids stars which get brighter and fainter by some tens of percent every ten to a hundred days are mostly understood. But recently it has become clear that our theories of what happens in the outer layers of these stars which cause the variations in brightness do not totally ...
Unit 2 - WordPress.com
... The Universe is about 14 billion years old. The Big Bang formed the universe. The Big Bang was a big explosion. We don’t know why it happened. The universe is very big and it is getting bigger every day, just like you. The universe is made up of everything – planets, solar systems, galaxies and blac ...
... The Universe is about 14 billion years old. The Big Bang formed the universe. The Big Bang was a big explosion. We don’t know why it happened. The universe is very big and it is getting bigger every day, just like you. The universe is made up of everything – planets, solar systems, galaxies and blac ...
Volume 2 (Issue 7), July 2013
... galaxies. Since we know very little about the evolutionary process of galaxies, it is possible that quasars, as old as they are, represent a very early stage in the formation of galaxies. The energy we see may be ejected from the cores of these very young and very active galaxies. Some scientists ev ...
... galaxies. Since we know very little about the evolutionary process of galaxies, it is possible that quasars, as old as they are, represent a very early stage in the formation of galaxies. The energy we see may be ejected from the cores of these very young and very active galaxies. Some scientists ev ...
Observable universe
![](https://commons.wikimedia.org/wiki/Special:FilePath/Observable_Universe_with_Measurements_01.png?width=300)
The observable universe consists of the galaxies and other matter that can, in principle, be observed from Earth at the present time because light and other signals from these objects has had time to reach the Earth since the beginning of the cosmological expansion. Assuming the universe is isotropic, the distance to the edge of the observable universe is roughly the same in every direction. That is, the observable universe is a spherical volume (a ball) centered on the observer. Every location in the Universe has its own observable universe, which may or may not overlap with the one centered on Earth.The word observable used in this sense does not depend on whether modern technology actually permits detection of radiation from an object in this region (or indeed on whether there is any radiation to detect). It simply indicates that it is possible in principle for light or other signals from the object to reach an observer on Earth. In practice, we can see light only from as far back as the time of photon decoupling in the recombination epoch. That is when particles were first able to emit photons that were not quickly re-absorbed by other particles. Before then, the Universe was filled with a plasma that was opaque to photons.The surface of last scattering is the collection of points in space at the exact distance that photons from the time of photon decoupling just reach us today. These are the photons we detect today as cosmic microwave background radiation (CMBR). However, with future technology, it may be possible to observe the still older relic neutrino background, or even more distant events via gravitational waves (which also should move at the speed of light). Sometimes astrophysicists distinguish between the visible universe, which includes only signals emitted since recombination—and the observable universe, which includes signals since the beginning of the cosmological expansion (the Big Bang in traditional cosmology, the end of the inflationary epoch in modern cosmology). According to calculations, the comoving distance (current proper distance) to particles from the CMBR, which represent the radius of the visible universe, is about 14.0 billion parsecs (about 45.7 billion light years), while the comoving distance to the edge of the observable universe is about 14.3 billion parsecs (about 46.6 billion light years), about 2% larger.The best estimate of the age of the universe as of 2015 is 7010137990000000000♠13.799±0.021 billion years but due to the expansion of space humans are observing objects that were originally much closer but are now considerably farther away (as defined in terms of cosmological proper distance, which is equal to the comoving distance at the present time) than a static 13.8 billion light-years distance. It is estimated that the diameter of the observable universe is about 28 gigaparsecs (91 billion light-years, 8.8×1026 metres or 5.5×1023 miles), putting the edge of the observable universe at about 46–47 billion light-years away.