The Milky Way
... 4) the large orbital eccentricities of disk objects 5) the lack of heavy elements in globular cluster ...
... 4) the large orbital eccentricities of disk objects 5) the lack of heavy elements in globular cluster ...
megascope - Marcia Bartusiak
... tops of the American Southwest. With the cost of optical telescopes plummeting, it is conceivable that multi telescope arrangements will become more common at optical observatories. "It's an idea that people have had in the back of their minds for a very long time," says University of Minnesota ast ...
... tops of the American Southwest. With the cost of optical telescopes plummeting, it is conceivable that multi telescope arrangements will become more common at optical observatories. "It's an idea that people have had in the back of their minds for a very long time," says University of Minnesota ast ...
M13 – The Great Hercules Cluster
... for our ears while the stars of summer provide a symphony for our eyes. Go outside on a warm June night and look up at the stars. Everything you see is just a small part of the much larger collection of stars called the Milky Way Galaxy. Our star, the Sun, is only one of more than a hundred billion ...
... for our ears while the stars of summer provide a symphony for our eyes. Go outside on a warm June night and look up at the stars. Everything you see is just a small part of the much larger collection of stars called the Milky Way Galaxy. Our star, the Sun, is only one of more than a hundred billion ...
A Journey Through The Solar System - International Dark
... The Kuiper belt is located outside the orbit of Neptune. It consists of many small icy bodies and is a source of asteroids, comets, and meteors found in our solar system. © International Dark-Sky Association Images courtesy of NASA/PL-Caltech ...
... The Kuiper belt is located outside the orbit of Neptune. It consists of many small icy bodies and is a source of asteroids, comets, and meteors found in our solar system. © International Dark-Sky Association Images courtesy of NASA/PL-Caltech ...
a MS Word version.
... 6. How are the colors of stars related to their surface temperatures? What is the color index of a star and how does it measure the color (and therefore the temperature) of a star? Who developed the spectral classification system for stars? What are the spectral classes of stars and how are they re ...
... 6. How are the colors of stars related to their surface temperatures? What is the color index of a star and how does it measure the color (and therefore the temperature) of a star? Who developed the spectral classification system for stars? What are the spectral classes of stars and how are they re ...
Lecture 13 Local group chapter 4 of S+G
... irregulars with low mass; most are satellites of MW, M31 or M33 The gravitational interaction between these systems is complex but the local group is apparently bound. Major advantages – close and bright- all nearby enough that individual stars can be well measured as well as HI, H2, IR, x-ray sourc ...
... irregulars with low mass; most are satellites of MW, M31 or M33 The gravitational interaction between these systems is complex but the local group is apparently bound. Major advantages – close and bright- all nearby enough that individual stars can be well measured as well as HI, H2, IR, x-ray sourc ...
Chapter 7
... formed Sun (protosun) will prevent the condensation of more volatile elements. Planets forming there will thus be made of nonvolatile, dense material. 4. Farther out, the eddies are larger and the temperatures cooler so large planets can form that are composed of volatile elements (light gases). 5. ...
... formed Sun (protosun) will prevent the condensation of more volatile elements. Planets forming there will thus be made of nonvolatile, dense material. 4. Farther out, the eddies are larger and the temperatures cooler so large planets can form that are composed of volatile elements (light gases). 5. ...
Lecture 20: Formation of Planets, Exoplanets 3/30
... observed and now about 3700 confirmed. Many systems with 2 or more observed planets • difficult to observe directly • mostly look for impact on Star: wobbles due to gravity of planets or reduction of light due to “eclipse” • If multiple planets, will have to add effects of planets (our solar system: ...
... observed and now about 3700 confirmed. Many systems with 2 or more observed planets • difficult to observe directly • mostly look for impact on Star: wobbles due to gravity of planets or reduction of light due to “eclipse” • If multiple planets, will have to add effects of planets (our solar system: ...
An extrasolar planetary system with three
... known at present and often reveals the presence of other bodies in the systems. The 17 multi-planet systems detected to date have been the subject of numerous researches studying their formation, dynamical evolution and long-term stability. They show an impressive diversity in planetary masses, orbi ...
... known at present and often reveals the presence of other bodies in the systems. The 17 multi-planet systems detected to date have been the subject of numerous researches studying their formation, dynamical evolution and long-term stability. They show an impressive diversity in planetary masses, orbi ...
A Universe of Galaxies - Pennsylvania State University
... What can outshine ~1000 supernovae for millions of years, and be just slightly larger than our Solar System? Theoretically, not much – only a very, very big black hole. • Start with a black hole with a mass of 10,000,000,000 Mʘ • Have a star come close enough to be tidally disrupted • Have the mater ...
... What can outshine ~1000 supernovae for millions of years, and be just slightly larger than our Solar System? Theoretically, not much – only a very, very big black hole. • Start with a black hole with a mass of 10,000,000,000 Mʘ • Have a star come close enough to be tidally disrupted • Have the mater ...
Nebula Beginnings - University of Dayton
... titanic supernova explosions scatter this material back into space where it is used to create new generations of stars. This is the mechanism by which the gas and dust that formed our solar system became enriched with the elements that sustain life on this planet. Hubble spectroscopic observations w ...
... titanic supernova explosions scatter this material back into space where it is used to create new generations of stars. This is the mechanism by which the gas and dust that formed our solar system became enriched with the elements that sustain life on this planet. Hubble spectroscopic observations w ...
Characteristics of Stars
... Key Concept: The brightness of a star depends upon both its size and temperature. • Stars differ in how bright they are. A hot star shines brighter than a cool star. A large star shines brighter than a small star. • A star’s apparent brightness is the brightness you see from Earth. A hot, large star ...
... Key Concept: The brightness of a star depends upon both its size and temperature. • Stars differ in how bright they are. A hot star shines brighter than a cool star. A large star shines brighter than a small star. • A star’s apparent brightness is the brightness you see from Earth. A hot, large star ...
TAP 704- 8: The ladder of astronomical distances
... often welcome doing work such as making calculations for their male colleagues. The American Henrietta Leavitt found herself such a role at Harvard. In 1912, photography was beginning to be used not just to make pictures through telescopes, but to make careful measurements. Over time, Miss Leavitt b ...
... often welcome doing work such as making calculations for their male colleagues. The American Henrietta Leavitt found herself such a role at Harvard. In 1912, photography was beginning to be used not just to make pictures through telescopes, but to make careful measurements. Over time, Miss Leavitt b ...
V - ESO
... This is generally assumed to be the reason why, though star formation proceeds on a typical scale comparable to the size of a giant molecular cloud (~80 pc, Efremov 1995, AJ 100, 2757), Milky Way massive clusters tend to be much smaller. Image taken from class by James Schombert, University of Oreg ...
... This is generally assumed to be the reason why, though star formation proceeds on a typical scale comparable to the size of a giant molecular cloud (~80 pc, Efremov 1995, AJ 100, 2757), Milky Way massive clusters tend to be much smaller. Image taken from class by James Schombert, University of Oreg ...
astrocoursespring2012lec5-1-1
... Then… as the telescope looks outward the realm of the superclusters stretches into unmapped deserts of time…As a telescope looks backward into time (or out into space) the galaxies appear smaller and fainter. When a telescope probes about 5 billion light years into look-back time, it can detect only ...
... Then… as the telescope looks outward the realm of the superclusters stretches into unmapped deserts of time…As a telescope looks backward into time (or out into space) the galaxies appear smaller and fainter. When a telescope probes about 5 billion light years into look-back time, it can detect only ...
Galaxies
... into the sky. Using computers, we are able to build up a model demonstrating the collision between galaxies. We will begin with a brief introduction of colliding galaxies and then show how we have been able to simulate them using computer programs and compare them with real examples. ...
... into the sky. Using computers, we are able to build up a model demonstrating the collision between galaxies. We will begin with a brief introduction of colliding galaxies and then show how we have been able to simulate them using computer programs and compare them with real examples. ...
Word
... into the sky. Using computers, we are able to build up a model demonstrating the collision between galaxies. We will begin with a brief introduction of colliding galaxies and then show how we have been able to simulate them using computer programs and compare them with real examples. ...
... into the sky. Using computers, we are able to build up a model demonstrating the collision between galaxies. We will begin with a brief introduction of colliding galaxies and then show how we have been able to simulate them using computer programs and compare them with real examples. ...
Microlensing Studies in Crowded Fields
... Sensitivity to Earth and Moon mass objects! • OGLE-2005-BLG-390 was a star ~9.6 Rsun and planet of ~5Mearth. • An Earth mass planet at the same location around that giant star would have given a ~3% deviation. • A Moon mass object around a Sun like star would have given ~1% deviation lasting over o ...
... Sensitivity to Earth and Moon mass objects! • OGLE-2005-BLG-390 was a star ~9.6 Rsun and planet of ~5Mearth. • An Earth mass planet at the same location around that giant star would have given a ~3% deviation. • A Moon mass object around a Sun like star would have given ~1% deviation lasting over o ...
The Solar System Interplanetary Matter and the Birth of the Planets
... Nebular Theory for Solar System formation Our Sun and the planets originated from the collapse of an interstellar cloud of dust and gas (nebula) • Normally the gas and dust does not collapse by itself. But a pressure wave generated from a supernova explosion or a density wave in the galaxy may comp ...
... Nebular Theory for Solar System formation Our Sun and the planets originated from the collapse of an interstellar cloud of dust and gas (nebula) • Normally the gas and dust does not collapse by itself. But a pressure wave generated from a supernova explosion or a density wave in the galaxy may comp ...
BV Color Index and Temperature - The University of Texas at Dallas
... • give a factor of 1.4 to 1.8 × variation in the resultant distance. • increases as the stellar distance increases only accurate enough to measure stellar distances of up to about 10 Mpc. • star has to be sufficiently bright to be able to measure the spectrum • can be obscured by matter between the ...
... • give a factor of 1.4 to 1.8 × variation in the resultant distance. • increases as the stellar distance increases only accurate enough to measure stellar distances of up to about 10 Mpc. • star has to be sufficiently bright to be able to measure the spectrum • can be obscured by matter between the ...
Section 4
... Since then, astronomers have discovered more than 100 planets around other stars, and new ones are being discovered all of the time. Most of these new planets are very large, with at least half of the mass of Jupiter. A small planet would be hard to detect because it would have little gravitational ...
... Since then, astronomers have discovered more than 100 planets around other stars, and new ones are being discovered all of the time. Most of these new planets are very large, with at least half of the mass of Jupiter. A small planet would be hard to detect because it would have little gravitational ...
What theory best explains the features of our
... 1. Orbits in habitable zone (liquid water exists) 2. Has a large, fairly close moon 3. Orbits right type star @ right time 4. Solar system is in right region of the galaxy 5. Planet is right size, not too big or too small 6. Has plate tectonics ...
... 1. Orbits in habitable zone (liquid water exists) 2. Has a large, fairly close moon 3. Orbits right type star @ right time 4. Solar system is in right region of the galaxy 5. Planet is right size, not too big or too small 6. Has plate tectonics ...
Chapter 15: The Milky Way Galaxy
... Where is our solar system located in the Milky Way Galaxy? The solar system is between the Sagittarius and Perseus spiral arms about 26,000 ly from the center of the Galaxy. Is the Sun moving through the Milky Way Galaxy and, if so, how fast? The Sun orbits the center of the Milky Way Galaxy at a sp ...
... Where is our solar system located in the Milky Way Galaxy? The solar system is between the Sagittarius and Perseus spiral arms about 26,000 ly from the center of the Galaxy. Is the Sun moving through the Milky Way Galaxy and, if so, how fast? The Sun orbits the center of the Milky Way Galaxy at a sp ...
Ch 28 Class Notes
... Because Earth orbits the sun, astronomers experience parallax when they observe the stars. Astronomers can _____________ ______________________________________________________________________________, by knowing the angle between two observed positions and the distance between the observation point ...
... Because Earth orbits the sun, astronomers experience parallax when they observe the stars. Astronomers can _____________ ______________________________________________________________________________, by knowing the angle between two observed positions and the distance between the observation point ...
Poster - University of North Dakota
... Motivation: The motivation for finding new asteroids is to increase the database of known asteroids and therefore increase the knowledge about the structure of our solar system. In addition, observations of known asteroids are used to update orbital data. Asteroids play an important role in understa ...
... Motivation: The motivation for finding new asteroids is to increase the database of known asteroids and therefore increase the knowledge about the structure of our solar system. In addition, observations of known asteroids are used to update orbital data. Asteroids play an important role in understa ...
Space Interferometry Mission
The Space Interferometry Mission, or SIM, also known as SIM Lite (formerly known as SIM PlanetQuest), was a planned space telescope developed by the U.S. National Aeronautics and Space Administration (NASA), in conjunction with contractor Northrop Grumman. One of the main goals of the mission was the hunt for Earth-sized planets orbiting in the habitable zones of nearby stars other than the Sun. SIM was postponed several times and finally cancelled in 2010.In addition to hunting for extrasolar planets, SIM would have helped astronomers construct a map of the Milky Way galaxy. Other important tasks would have included collecting data to help pinpoint stellar masses for specific types of stars, assisting in the determination of the spatial distribution of dark matter in the Milky Way and in the Local Group of galaxies and using the gravitational microlensing effect to measure the mass of stars.The spacecraft would have used optical interferometry to accomplish these and other scientific goals. This technique collects light with multiple mirrors (in SIM's case, two) which is combined to make an interference pattern which can be very precisely measured.The initial contracts for SIM Lite were awarded in 1998, totaling US$200 million. Work on the SIM project required scientists and engineers to move through eight specific new technology milestones, and by November 2006, all eight had been completed.SIM Lite was originally scheduled for a 2005 launch, aboard an Evolved Expendable Launch Vehicle (EELV). As a result of continued budget cuts, the launch date has been pushed back at least five times. NASA has set a preliminary launch date for 2015 and U.S. federal budget documents confirm that a launch date is expected ""no earlier"" than 2015. The budget cuts to SIM Lite are expected to continue through FY 2010. As of February 2007, many of the engineers working on the SIM program had moved on to other areas and projects, and NASA directed the project to allocate its resources toward engineering risk reduction. However, the preliminary budget for NASA for 2008 included zero dollars for SIM.In December 2007, the Congress restored funding for fiscal year 2008 as part of an omnibus appropriations bill which the President later signed. At the same time the Congress directed NASA to move the mission forward to the development phase. In 2009 the project continued its risk reduction work while waiting for the findings and recommendations of the Astronomy and Astrophysics Decadal Survey, Astro2010, performed by the National Academy of Sciences, which would determine the project's future.On 13 August 2010, the Astro2010 Decadal Report was released and did not recommend that NASA continue the development of the SIM Lite Astrometric Observatory. This prompted NASA Astronomy and Physics Director, Jon Morse, to issue a letter on 24 September 2010 to the SIM Lite project manager, informing him that NASA was discontinuing its sponsorship of the SIM Lite mission and directing the project to discontinue Phase B activities immediately or as soon as practical. Accordingly, all SIM Lite activities were closed down by the end of calendar year 2010.