Spectroscopy – the study of the colors of light (the spectrum) given
... The abundance of Hydrogen is actually similar for all stars, the different intensities of H-lines from one star to another is due to differences in temperature causing different levels of ionization. ...
... The abundance of Hydrogen is actually similar for all stars, the different intensities of H-lines from one star to another is due to differences in temperature causing different levels of ionization. ...
Powerpoint Presentation (large file)
... observed in a supernova • Explosive helium fusion may occur in the surface layer of a companion neutron star • This produces a sudden increase in X-ray radiation, which we call a burster ...
... observed in a supernova • Explosive helium fusion may occur in the surface layer of a companion neutron star • This produces a sudden increase in X-ray radiation, which we call a burster ...
Document
... Absorption and Scattering • Q: Why are sunsets red? • Light is absorbed or scattered by objects the same size or smaller than its wavelength. • Dust grains = wavelength of blue light • Dust clouds: – Opaque to blue light, UV, X-rays – Transparent to red light, IR, radio ...
... Absorption and Scattering • Q: Why are sunsets red? • Light is absorbed or scattered by objects the same size or smaller than its wavelength. • Dust grains = wavelength of blue light • Dust clouds: – Opaque to blue light, UV, X-rays – Transparent to red light, IR, radio ...
presentation source
... “[Owing to nuclear physicists good proposal of a ‘big bang’ origin of the Universe some 3 million years ago…] We are indeed forced to conclude that the present variety of stars in the sky is the result of the original method of star formation rather than of any evolutionary process.” --Lyman Sptitze ...
... “[Owing to nuclear physicists good proposal of a ‘big bang’ origin of the Universe some 3 million years ago…] We are indeed forced to conclude that the present variety of stars in the sky is the result of the original method of star formation rather than of any evolutionary process.” --Lyman Sptitze ...
Star Formation
... • Without CO molecules to provide cooling, the clouds that formed the first stars had to be considerably warmer than today’s molecular clouds • The first stars must therefore have been more massive than most of today’s stars, for gravity to overcome pressure ...
... • Without CO molecules to provide cooling, the clouds that formed the first stars had to be considerably warmer than today’s molecular clouds • The first stars must therefore have been more massive than most of today’s stars, for gravity to overcome pressure ...
Chapter 14 Stellar Corpses Stellar Corpses White Dwarfs White
... • Massive stars greater than 10 M upon collapse compress their cores so much that no pressure is capable of supporting it – a black hole results • A black hole is an “object” (region of space) that has an escape velocity that exceeds the speed of light – hence the name – Using the equation for the ...
... • Massive stars greater than 10 M upon collapse compress their cores so much that no pressure is capable of supporting it – a black hole results • A black hole is an “object” (region of space) that has an escape velocity that exceeds the speed of light – hence the name – Using the equation for the ...
Basic Properties of Stars
... Note: T increases to left and bright stars at the top. Band upper left to lower right is called the Main Sequence. It contains 8090% of all stars. White dwarfs at lower left. ...
... Note: T increases to left and bright stars at the top. Band upper left to lower right is called the Main Sequence. It contains 8090% of all stars. White dwarfs at lower left. ...
Publisher: Emily Barrosse Acquisitions Editor: Kelley Tyner
... Though the details can differ, all stars containing less than about ten times the Sun’s mass will have the same fate. As fusion exhausts the hydrogen in their centers, their internal pressure will diminish. Gravity will pull the core in, and the core will heat up again. Hydrogen will begin “burning” ...
... Though the details can differ, all stars containing less than about ten times the Sun’s mass will have the same fate. As fusion exhausts the hydrogen in their centers, their internal pressure will diminish. Gravity will pull the core in, and the core will heat up again. Hydrogen will begin “burning” ...
Perseid Watch at Weiser State Forest August 12
... chemical elements in stars in the Milky Way. The light chemical element lithium is one of the few elements that is predicted to have been created by the Big Bang, 13.8 billion years ago. But understanding the amounts of lithium observed in stars around us today in the Universe has given astronomers ...
... chemical elements in stars in the Milky Way. The light chemical element lithium is one of the few elements that is predicted to have been created by the Big Bang, 13.8 billion years ago. But understanding the amounts of lithium observed in stars around us today in the Universe has given astronomers ...
Luminosity Classes
... They get noticeably dimmer, then brighter, then dimmer again. These are called Variable Stars. The change in luminosity is due to a change in size. (Though temperature changes too.) ...
... They get noticeably dimmer, then brighter, then dimmer again. These are called Variable Stars. The change in luminosity is due to a change in size. (Though temperature changes too.) ...
Theme 7.2 -- The Complete Solar System
... So, we've discovered planetary systems around many stars but we should be aware of very strong ‘selection effects’ -- that is to say certain biases that are going to influence the kinds of planets we can detect and constrain our ability to draw general conclusions. For example, planets that are big ...
... So, we've discovered planetary systems around many stars but we should be aware of very strong ‘selection effects’ -- that is to say certain biases that are going to influence the kinds of planets we can detect and constrain our ability to draw general conclusions. For example, planets that are big ...
Astronomy (stars, galaxies and the Universe)
... Stars are spread unevenly Typically smaller than other types of galaxies Generally have many bright young stars and lots of gas and dust to form new stars ...
... Stars are spread unevenly Typically smaller than other types of galaxies Generally have many bright young stars and lots of gas and dust to form new stars ...
The Ionization Structure of the Irregular Galaxy NGC 4449
... Galaxies are gravitationally bound aggregations of stars, gas and dust. In the 1920's, Edwin Hubble classified galaxies by their shape into three major types, spiral, elliptical and irregular. Examples are shown in Figures 1a, b and c. More details about galaxies can be found in the article from thi ...
... Galaxies are gravitationally bound aggregations of stars, gas and dust. In the 1920's, Edwin Hubble classified galaxies by their shape into three major types, spiral, elliptical and irregular. Examples are shown in Figures 1a, b and c. More details about galaxies can be found in the article from thi ...
Neutron Star
... In the last two chapters you have traced the story of stars from birth to death. By now you are asking a simple question, “What’s left?” The answer depends on the mass of the star. You already know that stars like the sun produce white dwarf corpses, but more massive stars leave behind the strangest ...
... In the last two chapters you have traced the story of stars from birth to death. By now you are asking a simple question, “What’s left?” The answer depends on the mass of the star. You already know that stars like the sun produce white dwarf corpses, but more massive stars leave behind the strangest ...
The Milky Way - Houston Community College System
... In the previous two chapters you have traced the story of stars from birth to death. By now you are asking a simple question, “What’s left?” The answer depends on the mass of the star. You already know that stars like the sun produce white dwarf, but more massive stars leave behind the strangest bea ...
... In the previous two chapters you have traced the story of stars from birth to death. By now you are asking a simple question, “What’s left?” The answer depends on the mass of the star. You already know that stars like the sun produce white dwarf, but more massive stars leave behind the strangest bea ...
Death of Stars • Models of Star behavior can give estimates of how
... • SN1987A in the Large Magellanic Cloud. The neutrino flux from this event was seen before the visible light was observed. The star was known as Sanduleak 69-202, a blue supergiant 25 times more massive than the Sun. ...
... • SN1987A in the Large Magellanic Cloud. The neutrino flux from this event was seen before the visible light was observed. The star was known as Sanduleak 69-202, a blue supergiant 25 times more massive than the Sun. ...
Cygnus (constellation)
Cygnus /ˈsɪɡnəs/ is a northern constellation lying on the plane of the Milky Way, deriving its name from the Latinized Greek word for swan. The swan is one of the most recognizable constellations of the northern summer and autumn, it features a prominent asterism known as the Northern Cross (in contrast to the Southern Cross). Cygnus was among the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations.Cygnus contains Deneb, one of the brightest stars in the night sky and one corner of the Summer Triangle, as well as some notable X-ray sources and the giant stellar association of Cygnus OB2. One of the stars of this association, NML Cygni, is one of the largest stars currently known. The constellation is also home to Cygnus X-1, a distant X-ray binary containing a supergiant and unseen massive companion that was the first object widely held to be a black hole. Many star systems in Cygnus have known planets as a result of the Kepler Mission observing one patch of the sky, the patch is the area around Cygnus. In addition, most of the eastern part of Cygnus is dominated by the Hercules–Corona Borealis Great Wall, a giant galaxy filament that is the largest known structure in the observable universe; covering most of the northern sky.