Chapter 28 Stars and Their Characteristics
... • The smaller a star is the longer it will live. – Larger stars have more fuel, but they have to burn (fuse) it faster in order to maintain equilibrium. – Because fusion occurs at a faster rate in massive stars, large stars use all their fuel in a shorter length of time. – So…A smaller star has less ...
... • The smaller a star is the longer it will live. – Larger stars have more fuel, but they have to burn (fuse) it faster in order to maintain equilibrium. – Because fusion occurs at a faster rate in massive stars, large stars use all their fuel in a shorter length of time. – So…A smaller star has less ...
White Dwarfs and Neutron Stars
... • Neutron stars can form powerful jets of matter and energy • Previously only thought possible with black holes • Binary system with neutron star gaining matter from white dwarf companion’s atmosphere in an accretion disk • Neutron star is tiny compared to white dwarf but is very dense and about 14 ...
... • Neutron stars can form powerful jets of matter and energy • Previously only thought possible with black holes • Binary system with neutron star gaining matter from white dwarf companion’s atmosphere in an accretion disk • Neutron star is tiny compared to white dwarf but is very dense and about 14 ...
Controlling a Three Meter Mirror Array Reflector to Track Stars
... relative to our standard time. As opposed to basing a day on the time it takes for the Earth to make a revolution relative to the sun, it bases it on the time it takes for the Earth to make a revolution relative to the distant stars on the celestial sphere. Since sidereal time is required to make th ...
... relative to our standard time. As opposed to basing a day on the time it takes for the Earth to make a revolution relative to the sun, it bases it on the time it takes for the Earth to make a revolution relative to the distant stars on the celestial sphere. Since sidereal time is required to make th ...
How are stars and planets alike and different?
... • Planets are closer to us than stars and the planets are in constant motion as they orbit the sun; therefore, they can be seen in different locations in the night sky in relation to the ...
... • Planets are closer to us than stars and the planets are in constant motion as they orbit the sun; therefore, they can be seen in different locations in the night sky in relation to the ...
4-6 Script
... become the standard for Astronomers to use all over the world. In Science, constellations can be used as maps. Constellations divide the sky up into familiar boundaries, just as the United States is divided into familiar boundaries called states. Every major star in the sky is part of a constellatio ...
... become the standard for Astronomers to use all over the world. In Science, constellations can be used as maps. Constellations divide the sky up into familiar boundaries, just as the United States is divided into familiar boundaries called states. Every major star in the sky is part of a constellatio ...
Our Place in Universe
... The stars in a constellation are physically close to one another T F The star Polaris always lies precisely at the north celestial pole T F Constellations are no longer used by astronomers T F The solar day is longer than the sidereal day T F The constellations lying along the ecliptic are collectiv ...
... The stars in a constellation are physically close to one another T F The star Polaris always lies precisely at the north celestial pole T F Constellations are no longer used by astronomers T F The solar day is longer than the sidereal day T F The constellations lying along the ecliptic are collectiv ...
Chpt12a
... Most stars spend a majority of their lives (~90%) on the main sequence (about 10 billion years for our Sun) Virtually all the low mass stars ever formed still exist. None of them have left the main sequence. ...
... Most stars spend a majority of their lives (~90%) on the main sequence (about 10 billion years for our Sun) Virtually all the low mass stars ever formed still exist. None of them have left the main sequence. ...
12.425 Lecture 15 Tuesday November 20, 2007
... a slight emission possibility at a few points below 10 microns again. The polarity of models raises the question, students noted, that there might be other models to fit this data as well. The final example of the theoretical spectra shows that the temperature of the atmosphere is not constant as r ...
... a slight emission possibility at a few points below 10 microns again. The polarity of models raises the question, students noted, that there might be other models to fit this data as well. The final example of the theoretical spectra shows that the temperature of the atmosphere is not constant as r ...
constellations
... The Sun rises in the east, follows a curved path through the sky, and sets in the west. The stars then become visible. Like the Sun, these also follow circular arcs from east to west. The apparent movement of objects through the sky over the course of a day is caused by the rotation of the Earth on ...
... The Sun rises in the east, follows a curved path through the sky, and sets in the west. The stars then become visible. Like the Sun, these also follow circular arcs from east to west. The apparent movement of objects through the sky over the course of a day is caused by the rotation of the Earth on ...
File - greenscapes4you
... detector, such as a CCD, that records how much energy strikes its light-sensitive surface each second. Total luminosity and total apparent brightness take into account all photons across the entire electromagnetic spectrum. Once a star’s apparent brightness has been measured, the next step in determ ...
... detector, such as a CCD, that records how much energy strikes its light-sensitive surface each second. Total luminosity and total apparent brightness take into account all photons across the entire electromagnetic spectrum. Once a star’s apparent brightness has been measured, the next step in determ ...
Stellar Evolution
... neighborhood of our Sun, within our Milky Way. No, not in other galaxies, but throughout our Milky Way. Yes, but only nearby galaxies in our Local Group. Yes, out to about half the distance through the visible Universe. Yes essentially throughout the entire visible ...
... neighborhood of our Sun, within our Milky Way. No, not in other galaxies, but throughout our Milky Way. Yes, but only nearby galaxies in our Local Group. Yes, out to about half the distance through the visible Universe. Yes essentially throughout the entire visible ...
Earth Science Notes
... Circumpolar constellations appear to rotate around Polaris (north star) Some constellations are only visible during certain times of the year ...
... Circumpolar constellations appear to rotate around Polaris (north star) Some constellations are only visible during certain times of the year ...
IBT Poster -- TAO - Roane State Community College
... chemistry for understanding our place in the universe. Unfortunately, because of illumination from street lamps, car headlights and lighted signs, the night skies are becoming less accessible. Only when we find an isolated mountain, such as the one on which the Tamke-Allan Observatory (TAO) is locat ...
... chemistry for understanding our place in the universe. Unfortunately, because of illumination from street lamps, car headlights and lighted signs, the night skies are becoming less accessible. Only when we find an isolated mountain, such as the one on which the Tamke-Allan Observatory (TAO) is locat ...
The Exploration of the Unknown
... Mercury around the sun, there are three full rotations about its axis, and thus for every other perihelion passage the same face is visible from the Earth and for more than a hundred years astronomers had apparently ignored half of their admittedly difficult observations of the sparse surface markin ...
... Mercury around the sun, there are three full rotations about its axis, and thus for every other perihelion passage the same face is visible from the Earth and for more than a hundred years astronomers had apparently ignored half of their admittedly difficult observations of the sparse surface markin ...
The Family of Stars
... If an accreting white dwarf exceeds the Chandrasekhar mass limit, it collapses, triggering a type Ia supernova. ...
... If an accreting white dwarf exceeds the Chandrasekhar mass limit, it collapses, triggering a type Ia supernova. ...
Recap: High Mass Stars
... • The outer layers of the sun will expand, consuming the inner planets • Sun will become a Red Giant ...
... • The outer layers of the sun will expand, consuming the inner planets • Sun will become a Red Giant ...
Stars and Galaxies
... How far is the nearest star? If the earth was a dot 1 cm away from the sun then using the same scale the next star would be 2.5 km away (Alpha Centauri) In km Alpha Centauri is 40 trillion km away. Using km is not practical in astronomy because the scale is too small. ...
... How far is the nearest star? If the earth was a dot 1 cm away from the sun then using the same scale the next star would be 2.5 km away (Alpha Centauri) In km Alpha Centauri is 40 trillion km away. Using km is not practical in astronomy because the scale is too small. ...
Summary of the Presentation
... to assume that the distribution of exoEarth orbits will be similar to the sample of exoplanet orbits. Thus, the fraction of exoEarths that would have equatorial liquid water throughout their orbits (a reasonable requirement for habitability) can be estimated by using the star luminosity and orbit of ...
... to assume that the distribution of exoEarth orbits will be similar to the sample of exoplanet orbits. Thus, the fraction of exoEarths that would have equatorial liquid water throughout their orbits (a reasonable requirement for habitability) can be estimated by using the star luminosity and orbit of ...
THE DOPPLER EFFECT
... temperature and density. Beyond a temperature of about 109 K, the random thermal motion of subatomic particles becomes so rapid that its velocity is comparable to the speed of light. Early enough in the history of the universe, when these temperatures existed, Newtonian physics becomes less accurate ...
... temperature and density. Beyond a temperature of about 109 K, the random thermal motion of subatomic particles becomes so rapid that its velocity is comparable to the speed of light. Early enough in the history of the universe, when these temperatures existed, Newtonian physics becomes less accurate ...
The Hertzsprung-Russell Diagram
... About the Groups Most stars lie in the main sequence because if a star is hotter it is brighter. Thus you would expect stars of the same size but different temperatures to form a diagonal line since “hotter means brighter” That Main-Sequence is steeper than a ‘same-size diagonal” shows that larger ...
... About the Groups Most stars lie in the main sequence because if a star is hotter it is brighter. Thus you would expect stars of the same size but different temperatures to form a diagonal line since “hotter means brighter” That Main-Sequence is steeper than a ‘same-size diagonal” shows that larger ...
draft of Chicago poster paper - Astronomy Outreach at UT Austin
... students from several classes about their understanding of and interest in topics related to galaxy research. Their responses, and later pilot tests with secondary teachers and students, informed the development team's efforts. Among the topics are the electromagnetic spectrum, false-color imaging, ...
... students from several classes about their understanding of and interest in topics related to galaxy research. Their responses, and later pilot tests with secondary teachers and students, informed the development team's efforts. Among the topics are the electromagnetic spectrum, false-color imaging, ...
HR Diagram
... 8. If Rigel and Betelgeuse were the same size, explain why Rigel would appear brighter. __________________________________________________________________________________________ __________________________________________________________________________________________ 9. If star Large and star Smal ...
... 8. If Rigel and Betelgeuse were the same size, explain why Rigel would appear brighter. __________________________________________________________________________________________ __________________________________________________________________________________________ 9. If star Large and star Smal ...
Higher Hubble`s Law and the Big Bang Answers
... It is assumed that there was a beginning as time started with the Big Bang. When the universe cooled sufficiently to form atoms, photons of radiation were able to travel distances which propagated the entire universe. Red shift which shows stars and galaxies are moving away from us in the continual ...
... It is assumed that there was a beginning as time started with the Big Bang. When the universe cooled sufficiently to form atoms, photons of radiation were able to travel distances which propagated the entire universe. Red shift which shows stars and galaxies are moving away from us in the continual ...
William Borucki
... hours to over 1000 days and orbital distances range from 0.01 AU to many AU. Several planets have been discovered orbiting binary stars and one in a triple-star system. Preliminary estimates of the size distribution suggest two populations; one for large planets formed when gas and dust were abundan ...
... hours to over 1000 days and orbital distances range from 0.01 AU to many AU. Several planets have been discovered orbiting binary stars and one in a triple-star system. Preliminary estimates of the size distribution suggest two populations; one for large planets formed when gas and dust were abundan ...
The Hertzsprung-Russell Diagram
... The Hertzsprung-Russell Diagram Hertzsprung and Russell had the idea of plotting the luminosity of a star against its spectral type. This works best for a cluster, where you know the stars are all at the same distance. Then apparent brightness vs spectral type is basically the same as luminosity vs ...
... The Hertzsprung-Russell Diagram Hertzsprung and Russell had the idea of plotting the luminosity of a star against its spectral type. This works best for a cluster, where you know the stars are all at the same distance. Then apparent brightness vs spectral type is basically the same as luminosity vs ...
International Ultraviolet Explorer
The International Ultraviolet Explorer (IUE) was an astronomical observatory satellite primarily designed to take ultraviolet spectra. The satellite was a collaborative project between NASA, the UK Science Research Council and the European Space Agency (ESA). The mission was first proposed in early 1964, by a group of scientists in the United Kingdom, and was launched on January 26, 1978 aboard a NASA Delta rocket. The mission lifetime was initially set for 3 years, but in the end it lasted almost 18 years, with the satellite being shut down in 1996. The switch-off occurred for financial reasons, while the telescope was still functioning at near original efficiency.It was the first space observatory to be operated in real time by astronomers who visited the groundstations in the United States and Europe. Astronomers made over 104,000 observations using the IUE, of objects ranging from solar system bodies to distant quasars. Among the significant scientific results from IUE data were the first large scale studies of stellar winds, accurate measurements of the way interstellar dust absorbs light, and measurements of the supernova SN1987A which showed that it defied stellar evolution theories as they then stood. When the mission ended, it was considered the most successful astronomical satellite ever.