The Life of a Star - Department of Physics and Astronomy
... of observation yet known to the astronomer to learn anything about the universe as a whole? It is possible only because the universe, vast though it is, shows certain characteristics of a unified and bounded whole. …science shows unity in the whole structure, and diversity only in details.” ...
... of observation yet known to the astronomer to learn anything about the universe as a whole? It is possible only because the universe, vast though it is, shows certain characteristics of a unified and bounded whole. …science shows unity in the whole structure, and diversity only in details.” ...
Star Constellations
... When you look at the sky on a clear night, you can see hundreds of stars. A star is a giant ball of glowing gas that is very, very hot. A star generates energy by nuclear fusion reactions. Most of these stars are like our Sun. However, some stars are smaller than our Sun, and some are larger. Except ...
... When you look at the sky on a clear night, you can see hundreds of stars. A star is a giant ball of glowing gas that is very, very hot. A star generates energy by nuclear fusion reactions. Most of these stars are like our Sun. However, some stars are smaller than our Sun, and some are larger. Except ...
Star Life Cycle Review 1. What is the first stage of star creation? A
... 12. What are the two variables that are incorporated in the Hertzsprung-Russell diagram? A. a star's luminosity (brightness) and its distance from earth B. a star's age and its distance from earth C. a star's age and its surface temperature D. a star's luminosity (brightness) and its surface temper ...
... 12. What are the two variables that are incorporated in the Hertzsprung-Russell diagram? A. a star's luminosity (brightness) and its distance from earth B. a star's age and its distance from earth C. a star's age and its surface temperature D. a star's luminosity (brightness) and its surface temper ...
Course Content Form - Pima Community College
... students many options in terms of lab experience. These options include self-initiated field trips, personal observational projects, in-class collaborative laboratory activities, and individualized laboratory exercises. All involve various aspects of mathematics, including, but not limited to, logar ...
... students many options in terms of lab experience. These options include self-initiated field trips, personal observational projects, in-class collaborative laboratory activities, and individualized laboratory exercises. All involve various aspects of mathematics, including, but not limited to, logar ...
Today`s Powerpoint
... fusion goes into re-expanding and cooling the core. Takes only a few seconds! This slows fusion, so star gets dimmer again. - Then stable He -> C burning. Still have H -> He shell burning ...
... fusion goes into re-expanding and cooling the core. Takes only a few seconds! This slows fusion, so star gets dimmer again. - Then stable He -> C burning. Still have H -> He shell burning ...
Masers and high mass star formation Claire Chandler
... Indeed, around the BN/KL region there is the well known outflow with an age of about 1000 years. It is possible that the outflow and the ejection of BN and I were result of the same ...
... Indeed, around the BN/KL region there is the well known outflow with an age of about 1000 years. It is possible that the outflow and the ejection of BN and I were result of the same ...
May 2013 - Otterbein
... Where does the Energy come from? • Anaxagoras (500-428 BC): Sun a large hot rock – No, it would cool down too fast • Combustion? – No, it could last a few thousand years ...
... Where does the Energy come from? • Anaxagoras (500-428 BC): Sun a large hot rock – No, it would cool down too fast • Combustion? – No, it could last a few thousand years ...
Problem Set #2
... where C is a constant. Compute the value of C in units of minutes. 2. Earth-orbiting communications and weather satellites are often put into geosynchronous orbits with a period of Porbit = 1 sidereal day. a. What is the semimajor axis, ags, of a geosynchronous orbit? b. What is the orbital velocity ...
... where C is a constant. Compute the value of C in units of minutes. 2. Earth-orbiting communications and weather satellites are often put into geosynchronous orbits with a period of Porbit = 1 sidereal day. a. What is the semimajor axis, ags, of a geosynchronous orbit? b. What is the orbital velocity ...
Galaxies
... central bulge • Forms spiral arms that contain a lot of gas and dust • Population I stars are found in the spiral arms – these are young O and B main-sequence stars – they are often found in open clusters ...
... central bulge • Forms spiral arms that contain a lot of gas and dust • Population I stars are found in the spiral arms – these are young O and B main-sequence stars – they are often found in open clusters ...
Answer ALL questions from SECTION A and TWO questions from
... Using the first two equations of stellar structure, derive the first two homology relations, giving the ratios of density and pressure at any point for two stars of mass M1 and M2 . ...
... Using the first two equations of stellar structure, derive the first two homology relations, giving the ratios of density and pressure at any point for two stars of mass M1 and M2 . ...
Geography
... find the Big Dipper. Draw a straight line between the two stars of the Big Dipper as shown, toward the Little Dipper. The North Star is located at the end of the handle of the Little Dipper. The Polestar is the brightest of the Little Dipper stars. ...
... find the Big Dipper. Draw a straight line between the two stars of the Big Dipper as shown, toward the Little Dipper. The North Star is located at the end of the handle of the Little Dipper. The Polestar is the brightest of the Little Dipper stars. ...
Wednesday, April 17 - Otterbein University
... – If a star is actually closer than 10pc, its absolute magnitude will be a bigger number, i.e. it is intrinsically dimmer than it appears – If a star is farther than 10pc, its absolute magnitude will be a smaller number, i.e. it is intrinsically brighter than it appears ...
... – If a star is actually closer than 10pc, its absolute magnitude will be a bigger number, i.e. it is intrinsically dimmer than it appears – If a star is farther than 10pc, its absolute magnitude will be a smaller number, i.e. it is intrinsically brighter than it appears ...
Star Evolution
... Red dwarfs: the small, faint, end of the main sequence stars White dwarfs: remnants of star with less than 8 solar masses Black dwarfs: White dwarfs that have cooled to invisibility Brown dwarfs: less than 0.08Msun=80 Jupiters; never burn Hydrogen Planets are less massive than 13 Jupiters & cannot b ...
... Red dwarfs: the small, faint, end of the main sequence stars White dwarfs: remnants of star with less than 8 solar masses Black dwarfs: White dwarfs that have cooled to invisibility Brown dwarfs: less than 0.08Msun=80 Jupiters; never burn Hydrogen Planets are less massive than 13 Jupiters & cannot b ...
3A8d
... 4. ESSAY EXAMPLE: THE GROWTH OF GALAXIES An underlying theme throughout the course was the comparison of observed properties of galaxies with expectations from the current ΛCDM hierarchical model, which integrates a picture for the growth of galaxies with the buildup of the large scale structure of ...
... 4. ESSAY EXAMPLE: THE GROWTH OF GALAXIES An underlying theme throughout the course was the comparison of observed properties of galaxies with expectations from the current ΛCDM hierarchical model, which integrates a picture for the growth of galaxies with the buildup of the large scale structure of ...
Chapter 19 Star Formation
... enough, there is no further fragmentation. Reason: the star has become opaque to its own radiation: It has a photosphere! After this, the ‘trapped radiation heats the interior of the object as it contracts. Stage 3: Object becomes opaque and heats. The interior of the fragment has begun heating and ...
... enough, there is no further fragmentation. Reason: the star has become opaque to its own radiation: It has a photosphere! After this, the ‘trapped radiation heats the interior of the object as it contracts. Stage 3: Object becomes opaque and heats. The interior of the fragment has begun heating and ...
Astronomy Worksheet
... *In general a hot star’s spectrum looks smoother than a cooler star’s spectrum. *In very hot stars (> 10,000 K) most of the Hydrogen gas in the star’s atmosphere will be ionized. Since an ionized Hydrogen atom has no electron it cannot produce any spectral lines, thus the Hydrogen lines are weak in ...
... *In general a hot star’s spectrum looks smoother than a cooler star’s spectrum. *In very hot stars (> 10,000 K) most of the Hydrogen gas in the star’s atmosphere will be ionized. Since an ionized Hydrogen atom has no electron it cannot produce any spectral lines, thus the Hydrogen lines are weak in ...
Hipparcos distance estimates of the Ophiuchus and the Lupus cloud
... Note that the reliability of the maximum-likelihood technique presented here was also checked with numerical simulations. It is well known that the maximum-likelihood method is, under certain circumstances (verified in our case), asymptotically unbiased; however, we decided to test its behaviour in ...
... Note that the reliability of the maximum-likelihood technique presented here was also checked with numerical simulations. It is well known that the maximum-likelihood method is, under certain circumstances (verified in our case), asymptotically unbiased; however, we decided to test its behaviour in ...
Lecture 10 - Concord University
... Fusing light elements together results in more nuclear binding energy and less mass per nucleon. When the mass disappears, it is converted to energy so light-element fusion produces energy. But, when fusing any element to Fe, you now need to PROVIDE some energy to be converted into mass and Natu ...
... Fusing light elements together results in more nuclear binding energy and less mass per nucleon. When the mass disappears, it is converted to energy so light-element fusion produces energy. But, when fusing any element to Fe, you now need to PROVIDE some energy to be converted into mass and Natu ...
PowerPoint Presentation - Research in observational
... On the (red) giant branch: the first dredge-up • The expanding envelope is cool enough for molecules to form so that the opacity goes up and envelope convection sets in. • As the convective layer grows and extends from H-burning shell to surface, it brings to the surface the by products of H burnin ...
... On the (red) giant branch: the first dredge-up • The expanding envelope is cool enough for molecules to form so that the opacity goes up and envelope convection sets in. • As the convective layer grows and extends from H-burning shell to surface, it brings to the surface the by products of H burnin ...
The Ancient Mystery of the Planets
... • Compiled the most accurate (one arcminute) naked eye measurements ever made of planetary positions. • Tycho’s observations of comet and a supernova challenged perfect universe idea. • Still could not detect stellar parallax, and thus still thought Earth must be at center of solar system (but recog ...
... • Compiled the most accurate (one arcminute) naked eye measurements ever made of planetary positions. • Tycho’s observations of comet and a supernova challenged perfect universe idea. • Still could not detect stellar parallax, and thus still thought Earth must be at center of solar system (but recog ...
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial-velocity measurements from spectroscopy, this pinpointed all six quantities needed to determine the motion of stars. The resulting Hipparcos Catalogue, a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. Hipparcos ' follow-up mission, Gaia, was launched in 2013.The word ""Hipparcos"" is an acronym for High precision parallax collecting satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes.