Quasars
... • Quasars give off more energy than 100 normal galaxies combined. • Quasars give off such enormous amounts of energy that they can be a trillion times brighter than the Sun. • Quasars are so bright that they drown out the light from all the other stars in the same galaxy. • Most quasars are larger t ...
... • Quasars give off more energy than 100 normal galaxies combined. • Quasars give off such enormous amounts of energy that they can be a trillion times brighter than the Sun. • Quasars are so bright that they drown out the light from all the other stars in the same galaxy. • Most quasars are larger t ...
Lecture 2: A Modern View of the Universe
... Our Sun moves randomly relative to the other stars in the local Solar neighborhood… ...
... Our Sun moves randomly relative to the other stars in the local Solar neighborhood… ...
Lecture2.2014_v4 - UCO/Lick Observatory
... Our Sun moves randomly relative to the other stars in the local Solar neighborhood… ...
... Our Sun moves randomly relative to the other stars in the local Solar neighborhood… ...
CHAPTER 30: STARS, GALAXIES AND THE UNIVERSE Analyzing
... Nuclear fusion = combination of light atomic nuclei to form heavier atomic nuclei Astronomers learn about stars primarily by analyzing light that stars emit. Starlight passing through a spectrograph produces a display of colors and lines called a spectrum. Analyzing Starlight, continued All stars ha ...
... Nuclear fusion = combination of light atomic nuclei to form heavier atomic nuclei Astronomers learn about stars primarily by analyzing light that stars emit. Starlight passing through a spectrograph produces a display of colors and lines called a spectrum. Analyzing Starlight, continued All stars ha ...
The Milky Way: Home to Star Clusters
... was the original extent of the galaxy, and that this was created first, from the primordial gas that eventually collapsed in on itself, also demonstrated by the old stars contained within the globular clusters. This matter condensed to create the central bulge, which ultimately began to rotate, crea ...
... was the original extent of the galaxy, and that this was created first, from the primordial gas that eventually collapsed in on itself, also demonstrated by the old stars contained within the globular clusters. This matter condensed to create the central bulge, which ultimately began to rotate, crea ...
SUMSS - 京都大学
... suggest, and may account for up to 40% of the local star-formation density. • Dust obscuration in star-forming regions could lead to under-estimate of Ha line strength. • Deep VLA studies of clusters at z~0.4 (Smail et al. 1999) and local (z <0.5) “post-starburst” galaxies (Miller & Owen 2001) also ...
... suggest, and may account for up to 40% of the local star-formation density. • Dust obscuration in star-forming regions could lead to under-estimate of Ha line strength. • Deep VLA studies of clusters at z~0.4 (Smail et al. 1999) and local (z <0.5) “post-starburst” galaxies (Miller & Owen 2001) also ...
Lecture notes 18: Galaxies and galaxy clusters
... In contradiction to the spiral galaxies, the Hubble type does not correlate well with any of the physical properties of elliptical galaxies. These galaxies were until recently to be among the simplest galaxies but are now considered to be the most complex and diverse group. There are a number of typ ...
... In contradiction to the spiral galaxies, the Hubble type does not correlate well with any of the physical properties of elliptical galaxies. These galaxies were until recently to be among the simplest galaxies but are now considered to be the most complex and diverse group. There are a number of typ ...
Chapter 27 Quasars, Active Galaxies, and Gamma
... If we could see the last few seconds of the collapse of a star to form a black hole, we would see the star grow steadily redder. Why? 1. The star moves away from us at an increasing speed. 2. The star grows steadily cooler. 3. The star's gravitational redshift increases. 4. The star becomes obscure ...
... If we could see the last few seconds of the collapse of a star to form a black hole, we would see the star grow steadily redder. Why? 1. The star moves away from us at an increasing speed. 2. The star grows steadily cooler. 3. The star's gravitational redshift increases. 4. The star becomes obscure ...
Ch 3 PPT - Blountstown Middle School
... • For the most massive stars, atomic forces holding neutrons together are not strong enough to overcome so much mass in such a small volume. Gravity is too strong, and the matter crushes into a black hole. • A black hole is an object whose gravity is so great that no light can escape. ...
... • For the most massive stars, atomic forces holding neutrons together are not strong enough to overcome so much mass in such a small volume. Gravity is too strong, and the matter crushes into a black hole. • A black hole is an object whose gravity is so great that no light can escape. ...
Ch17_Galaxies
... • Only a dozen or so member galaxies • Ragged, irregular look • High proportion of spirals and irregulars ...
... • Only a dozen or so member galaxies • Ragged, irregular look • High proportion of spirals and irregulars ...
Where Does Helium Come from?
... radio waves are low energy photons. Immediately after the Big Bang, only highenergy gamma rays existed which, when the Universe cooled, began to lose energy and fall into other portions of the electromagnetic spectrum (Fig. 2.1). All of the matter that was created during the Big Bang was formed from ...
... radio waves are low energy photons. Immediately after the Big Bang, only highenergy gamma rays existed which, when the Universe cooled, began to lose energy and fall into other portions of the electromagnetic spectrum (Fig. 2.1). All of the matter that was created during the Big Bang was formed from ...
–1– 2. Milky Way We know a great deal, perhaps more than any
... Kapteyn was aware of extinction problems. He searched for these, but did not find any significant effect. However, the mistake he made was at that time he was only aware of scattering by dust particles, but he did not consider absorption, which turns out to have a much more important effect. • Shapl ...
... Kapteyn was aware of extinction problems. He searched for these, but did not find any significant effect. However, the mistake he made was at that time he was only aware of scattering by dust particles, but he did not consider absorption, which turns out to have a much more important effect. • Shapl ...
Astrophysics
... that is 108 times larger than the forces between atoms (this is about the ratio of the weight of a jumbo jet to a mosquito). This means that the energy involved in nuclear reactions will also be around 100 million times as great as in chemical reactions. Thus the Sun has enough fuel to last many bil ...
... that is 108 times larger than the forces between atoms (this is about the ratio of the weight of a jumbo jet to a mosquito). This means that the energy involved in nuclear reactions will also be around 100 million times as great as in chemical reactions. Thus the Sun has enough fuel to last many bil ...
2.3 Peculiar galaxies
... just disappear down the black hole. However, if, as is very likely, the gas is rotating around the black hole, it will actually spiral in slowly. This is called an accretion disc. The energy is gained more gradually. As each layer of the disc slips downwards, half of the gained gravitational energy ...
... just disappear down the black hole. However, if, as is very likely, the gas is rotating around the black hole, it will actually spiral in slowly. This is called an accretion disc. The energy is gained more gradually. As each layer of the disc slips downwards, half of the gained gravitational energy ...
Lecture 22 - Cosmic distance scale
... as 1000 pc. • How to find distance to objects farther than 1000 pc? ...
... as 1000 pc. • How to find distance to objects farther than 1000 pc? ...
Internal heat production in hot Jupiter exo
... nature. Figure 2 is a Hubble Space Telescope image of a 10,000 light year long galactic jet. One such jet was observed to have a length of 865,000 light years. Consider a more or less spherical, gravitationally bound assemblage of dark (Population III) stars, a not yet ignited dark galaxy. Now consi ...
... nature. Figure 2 is a Hubble Space Telescope image of a 10,000 light year long galactic jet. One such jet was observed to have a length of 865,000 light years. Consider a more or less spherical, gravitationally bound assemblage of dark (Population III) stars, a not yet ignited dark galaxy. Now consi ...
Spiral galaxies: Spiral galaxies: Inclination Spiral galaxies: Internal
... • In denser regions of the ISM, collisions between atoms become frequent enough to form molecules. • The most common molecule is H2, but since H2 is a symmetric molecule, it has no rotational quantum transitions. It is therefore extremely difficult to detect. • As a tracer of H2, astronomers usually ...
... • In denser regions of the ISM, collisions between atoms become frequent enough to form molecules. • The most common molecule is H2, but since H2 is a symmetric molecule, it has no rotational quantum transitions. It is therefore extremely difficult to detect. • As a tracer of H2, astronomers usually ...
Exploring Space—The Universe: The Vast
... occur? (12 to 13 billion years ago.) How has the Hubble telescope been able to prove this theory? Explain how the Hubble telescope has been able to detect that galaxies are gradually moving away from each other. What does it mean when scientists say they have detected a redshift in the color of the ...
... occur? (12 to 13 billion years ago.) How has the Hubble telescope been able to prove this theory? Explain how the Hubble telescope has been able to detect that galaxies are gradually moving away from each other. What does it mean when scientists say they have detected a redshift in the color of the ...
exam 3 review lecture
... come from matter falling into big black hole (millions of solar masses) at the galaxies centers • Was our galaxy an AGN once? ...
... come from matter falling into big black hole (millions of solar masses) at the galaxies centers • Was our galaxy an AGN once? ...
15-3 Notes: Galaxies
... Irregular galaxies are galaxies that have no definite shape. The smallest irregular galaxies have only about 10 million stars. The largest irregular galaxies can contain several billion stars. Galaxies contain not only stars and planetary systems. Large features, such as gas clouds and star clusters ...
... Irregular galaxies are galaxies that have no definite shape. The smallest irregular galaxies have only about 10 million stars. The largest irregular galaxies can contain several billion stars. Galaxies contain not only stars and planetary systems. Large features, such as gas clouds and star clusters ...
Archaeology of the Milky Way - Max-Planck
... The dark-matter particles, in contrast, don’t exert any electric forces and clustered together to form huge clouds and long filaments. Their gravitational force attracted normal gas particles. These collected in a well like marbles, and the gas compacted to form the first stars and galaxies. Without ...
... The dark-matter particles, in contrast, don’t exert any electric forces and clustered together to form huge clouds and long filaments. Their gravitational force attracted normal gas particles. These collected in a well like marbles, and the gas compacted to form the first stars and galaxies. Without ...
Our Local Group of Galaxies
... • These results raise all sorts of questions: - is the ~constant (dark matter) mass a characteristic of galaxy formation, or does it say something about dark matter physics? (standard ΛCDM theory has no preferred mass scale) - see Strigari et al. 2008, Nature, 454, 1096 - how do you get the well d ...
... • These results raise all sorts of questions: - is the ~constant (dark matter) mass a characteristic of galaxy formation, or does it say something about dark matter physics? (standard ΛCDM theory has no preferred mass scale) - see Strigari et al. 2008, Nature, 454, 1096 - how do you get the well d ...
Stars
... A star is stable when its size remains constant over time. All stars have a stable period in their lives, the length of which is determined by their mass. The Sun is halfway though its nine billion year stable phase. ...
... A star is stable when its size remains constant over time. All stars have a stable period in their lives, the length of which is determined by their mass. The Sun is halfway though its nine billion year stable phase. ...