Lecture Nine (Powerpoint format) - Flash
... The majority of stars (unlike our sun) exist in bound systems of two stars orbiting about one another. Artist’s Conception of a Red Giant Orbiting a Black Hole ...
... The majority of stars (unlike our sun) exist in bound systems of two stars orbiting about one another. Artist’s Conception of a Red Giant Orbiting a Black Hole ...
The Birth of Stars Guiding Questions • Because stars shine by
... 6. What do star clusters tell us about the formation of stars? 7. Where in the Galaxy does star formation take place? 8. How can the death of one star trigger the birth of many other stars? ...
... 6. What do star clusters tell us about the formation of stars? 7. Where in the Galaxy does star formation take place? 8. How can the death of one star trigger the birth of many other stars? ...
Life cycle of low mass stars
... 5 Types of galaxies 1. Spiral = galaxy with tightly wound spiral arms; gas, dust, hot bright stars, arms (new stars - metals) and obvious disk (old stars) 2. Elliptical = slightly elliptical to nearly circular; light gas & dust, no disk or arms, few hot bright stars. Old stars 3. Barred Spiral = sp ...
... 5 Types of galaxies 1. Spiral = galaxy with tightly wound spiral arms; gas, dust, hot bright stars, arms (new stars - metals) and obvious disk (old stars) 2. Elliptical = slightly elliptical to nearly circular; light gas & dust, no disk or arms, few hot bright stars. Old stars 3. Barred Spiral = sp ...
Characterizing Stars - Department of Physics and Astronomy
... • Parallax measurements made from orbit, above the blurring effects of the atmosphere, are much more accurate than those made with Earth-based telescopes • Stellar parallaxes can only be measured for stars within a few hundred parsecs ...
... • Parallax measurements made from orbit, above the blurring effects of the atmosphere, are much more accurate than those made with Earth-based telescopes • Stellar parallaxes can only be measured for stars within a few hundred parsecs ...
60AZ-AR - OPT Telescopes
... Moon is so bright that it makes other objects in the sky difficult to see. These are nights that are excellent for lunar observation. Observe the Solar System: After observing the Moon, you are ready to step up to the next level of observation, the planets. There are four planets that you can easily ...
... Moon is so bright that it makes other objects in the sky difficult to see. These are nights that are excellent for lunar observation. Observe the Solar System: After observing the Moon, you are ready to step up to the next level of observation, the planets. There are four planets that you can easily ...
RR animation
... RR Lyrae stars pulse in a manner similar to Cepheid variables, so the mechanism for the pulsation is thought to be similar, but the nature and histories of these stars is thought to be rather different. (The average absolute magnitude of an RR Lyrae is 0.75, only 40 or 50 times brighter than our Sun ...
... RR Lyrae stars pulse in a manner similar to Cepheid variables, so the mechanism for the pulsation is thought to be similar, but the nature and histories of these stars is thought to be rather different. (The average absolute magnitude of an RR Lyrae is 0.75, only 40 or 50 times brighter than our Sun ...
Stars III The Hertzsprung
... in a stellar atmosphere become more and more excited due to more frequent collisions, so the lines in the star’s absorption spectrum change Eventually, if the temperature is high enough, some atoms are ionized and their lines disappear By knowing the energies of excitation and ionization of the vari ...
... in a stellar atmosphere become more and more excited due to more frequent collisions, so the lines in the star’s absorption spectrum change Eventually, if the temperature is high enough, some atoms are ionized and their lines disappear By knowing the energies of excitation and ionization of the vari ...
Measuring Astronomical Distances
... Hubble’s Law - http://www.pnas.org/content/101/1/8.full.pdf?sid=eebffd1c-a66e-4687-be33-9b34e767cf4b Spectroscopic Redshift - http://skyserver.sdss.org/dr1/en/proj/basic/universe/redshifts.asp ...
... Hubble’s Law - http://www.pnas.org/content/101/1/8.full.pdf?sid=eebffd1c-a66e-4687-be33-9b34e767cf4b Spectroscopic Redshift - http://skyserver.sdss.org/dr1/en/proj/basic/universe/redshifts.asp ...
Topic 1 notes - WordPress.com
... Over 1000 years later, the Polish astronomer Nicolaus Copernicus suggested a different model in which the Sun is at the centre of the Solar System, and the Earth and other planets orbit around it – the heliocentric model (note that the model also shows that the moon orbits round the Earth) The teles ...
... Over 1000 years later, the Polish astronomer Nicolaus Copernicus suggested a different model in which the Sun is at the centre of the Solar System, and the Earth and other planets orbit around it – the heliocentric model (note that the model also shows that the moon orbits round the Earth) The teles ...
1 Marsbugs: The Electronic Astrobiology Newsletter, Volume 12
... be common, the kinds of systems that could support life, which, like our solar system, presumably must remain stable over very long time scales, may not be so common." The computer simulations are reported in the April 14 issue of the journal Nature by Ford, Rasio and Verene Lystad, an undergraduate ...
... be common, the kinds of systems that could support life, which, like our solar system, presumably must remain stable over very long time scales, may not be so common." The computer simulations are reported in the April 14 issue of the journal Nature by Ford, Rasio and Verene Lystad, an undergraduate ...
Observing with the DIMMWIT at MRO
... There are four types of measurement that can be made: focal length, 2D r0 (as in a conventional DIMM), 1D t0, and 2D t0. Estimates of Fried’s parameter, as well as the seeing timescale, can be obtained from data taken in the t0 modes. If you don’t have more up-to-date advice, measure the focal lengt ...
... There are four types of measurement that can be made: focal length, 2D r0 (as in a conventional DIMM), 1D t0, and 2D t0. Estimates of Fried’s parameter, as well as the seeing timescale, can be obtained from data taken in the t0 modes. If you don’t have more up-to-date advice, measure the focal lengt ...
Winter 2014
... appear white primarily because our eyes are poor at detecting color in low-light conditions, Sirius is actually white in color. To the upper left of Orion, we find the brightest object (besides the Moon) in our 2014 winter sky, the planet Jupiter. While the various stars and constellations discussed ...
... appear white primarily because our eyes are poor at detecting color in low-light conditions, Sirius is actually white in color. To the upper left of Orion, we find the brightest object (besides the Moon) in our 2014 winter sky, the planet Jupiter. While the various stars and constellations discussed ...
Li-cai Deng
... Many surveys currently in progress will provide multi-color imaging of the sky. However, there is a great need for spectroscopic surveys of millions of stars. Twenty years ago, when the idea for the SDSS was born, large scale structures of galaxies had just been discovered. But there was structure o ...
... Many surveys currently in progress will provide multi-color imaging of the sky. However, there is a great need for spectroscopic surveys of millions of stars. Twenty years ago, when the idea for the SDSS was born, large scale structures of galaxies had just been discovered. But there was structure o ...
Document
... Note: Numerical modeling is often used in the study of stellar structure and evolution - the timescale over which a star is evolves is too long for us to follow the evolution of any one star. Also, numerical modeling allows us to build up a picture of things that we cannot see (such as the core of a ...
... Note: Numerical modeling is often used in the study of stellar structure and evolution - the timescale over which a star is evolves is too long for us to follow the evolution of any one star. Also, numerical modeling allows us to build up a picture of things that we cannot see (such as the core of a ...
Galaxies – Island universes
... • 1 light day! That’s the size of the solar system. How can you possibly get 1000 galaxies worth of luminosity out of something only as big as our solar system? • Only one mechanism can do it – a massive black hole with an accretion disk of infalling matter being heated to millions of degrees and gi ...
... • 1 light day! That’s the size of the solar system. How can you possibly get 1000 galaxies worth of luminosity out of something only as big as our solar system? • Only one mechanism can do it – a massive black hole with an accretion disk of infalling matter being heated to millions of degrees and gi ...
Astr604-Ch1
... the mass of star that is member of a binary system can calculate based on spectral line shifts. The radii of a number of stars have been found directly from measurement of their angular radii by means of an interferometer. Very seldom, in eclipsing binary systems, may the radius of a star be directl ...
... the mass of star that is member of a binary system can calculate based on spectral line shifts. The radii of a number of stars have been found directly from measurement of their angular radii by means of an interferometer. Very seldom, in eclipsing binary systems, may the radius of a star be directl ...
Lab 1 - PARI
... light), ultraviolet rays (light that gives us tans), visible light (light we can see with our eyes), infrared light (light that we sense as heat), microwaves (light we use in our microwaves), and finally radio waves (light we listen to on the radio and on our cellphones). Almost everything emits, re ...
... light), ultraviolet rays (light that gives us tans), visible light (light we can see with our eyes), infrared light (light that we sense as heat), microwaves (light we use in our microwaves), and finally radio waves (light we listen to on the radio and on our cellphones). Almost everything emits, re ...
MEADE INSTRUCTION MANUAL
... beginning observer is to “overpower” a telescope by using high magnifications which the telescope’s aperture and atmospheric conditions cannot reasonably support. Keep in mind that a smaller, but bright and well-resolved image is far superior to one that is larger, but dim and poorly resolved. Power ...
... beginning observer is to “overpower” a telescope by using high magnifications which the telescope’s aperture and atmospheric conditions cannot reasonably support. Keep in mind that a smaller, but bright and well-resolved image is far superior to one that is larger, but dim and poorly resolved. Power ...
Integrative Studies 410 Our Place in the Universe
... Mira Stars • Mira (=wonderful, lat.) [o Ceti]: sometimes visible with bare eye, sometimes faint • Long period variable star: 332 days period • Cool red giants • Sometimes periodic, sometimes irregular • some eject gas into space ...
... Mira Stars • Mira (=wonderful, lat.) [o Ceti]: sometimes visible with bare eye, sometimes faint • Long period variable star: 332 days period • Cool red giants • Sometimes periodic, sometimes irregular • some eject gas into space ...
astro-ph/0504597 PDF
... Supernova is one of the most violent phenomena that occur in the universe. Supernovae are really bright – about 10 billion times as luminous as the Sun. They tend to fade over months or years. The energy output of a supernova surpasses that of the galaxy as a whole! When one such occurs in our own G ...
... Supernova is one of the most violent phenomena that occur in the universe. Supernovae are really bright – about 10 billion times as luminous as the Sun. They tend to fade over months or years. The energy output of a supernova surpasses that of the galaxy as a whole! When one such occurs in our own G ...
Search For Trans-Neptunian Objects Using COROT
... Trans-Neptunian Objects (TNOs) are the witnesses of the early Solar System and can provide astronomers much valuable knowledge about their formation and dynamical evolution. The current understanding of their properties, however, such as the total mass, orbital parameters and the size distribution, ...
... Trans-Neptunian Objects (TNOs) are the witnesses of the early Solar System and can provide astronomers much valuable knowledge about their formation and dynamical evolution. The current understanding of their properties, however, such as the total mass, orbital parameters and the size distribution, ...
Powerpoint Presentation (large file)
... By carefully examining a star’s spectral lines, astronomers can determine whether that star is a main-sequence star, giant, supergiant, or white dwarf ...
... By carefully examining a star’s spectral lines, astronomers can determine whether that star is a main-sequence star, giant, supergiant, or white dwarf ...
Document
... four building block molecules known as base pairs. Different patterns of these pairs along the DNA strand constitute different genes. During methylation a molecule with a methyl group attaches itself to one of these base pairs (usually cytosine). This doesn’t damage or alter the DNA itself but it do ...
... four building block molecules known as base pairs. Different patterns of these pairs along the DNA strand constitute different genes. During methylation a molecule with a methyl group attaches itself to one of these base pairs (usually cytosine). This doesn’t damage or alter the DNA itself but it do ...
The Later Evolution of Low Mass Stars (< 8 solar masses)
... The C-O core is degenerate and transports its radiation by conduction. ...
... The C-O core is degenerate and transports its radiation by conduction. ...
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.