PHYS3380_110415_bw - The University of Texas at Dallas
... Important - When we observe a cluster, we are seeing a “freeze-frame” picture at a particular age. We see how stars of different masses have evolved up to that fixed age (this is not equivalent to an evolutionary track). ...
... Important - When we observe a cluster, we are seeing a “freeze-frame” picture at a particular age. We see how stars of different masses have evolved up to that fixed age (this is not equivalent to an evolutionary track). ...
Stellar Evolution : The Life and Death of Our Luminous Neighbors
... hydrostatic equilibrium - The balance between the weight of a layer in a star and the pressure that supports it luminosity - The rate at which electromagnetic radiation is emitted from a star or other object main sequence star - A star whose luminosity and surface temperature place it on the main se ...
... hydrostatic equilibrium - The balance between the weight of a layer in a star and the pressure that supports it luminosity - The rate at which electromagnetic radiation is emitted from a star or other object main sequence star - A star whose luminosity and surface temperature place it on the main se ...
Dancing with Stars 3 Dancing with Stars Binary Stellar Evolution 1
... evolution of single stars. More massive stars have more fuel to burn, but they burn the fuel at a profligate rate. As a result, massive stars live a much shorter time than smaller-mass stars that hoard their meager allotment of hydrogen fuel. Given this most important lesson, how are we to understan ...
... evolution of single stars. More massive stars have more fuel to burn, but they burn the fuel at a profligate rate. As a result, massive stars live a much shorter time than smaller-mass stars that hoard their meager allotment of hydrogen fuel. Given this most important lesson, how are we to understan ...
November Celestial Calendar by Dave Mitsky All times are UT
... and November 12 respectively. These streams form part of the complex associated with Comet 2P/Encke. The Full Moon severely compromises the peak of the Leonid meteor shower on the morning of November 17. Leonid meteors are debris from the periodic comet 55P/TempelTuttle. Because of their high speed ...
... and November 12 respectively. These streams form part of the complex associated with Comet 2P/Encke. The Full Moon severely compromises the peak of the Leonid meteor shower on the morning of November 17. Leonid meteors are debris from the periodic comet 55P/TempelTuttle. Because of their high speed ...
ph507weeks1
... Hipparchus of Nicea and refined by Ptolemy almost 2000 years ago. In this qualitative scheme, naked-eye stars fall into six categories: the brightest are of first magnitude, and the faintest of sixth magnitude. Note that the brighter the star, the smaller the value of the magnitude. In 1856, N. R. P ...
... Hipparchus of Nicea and refined by Ptolemy almost 2000 years ago. In this qualitative scheme, naked-eye stars fall into six categories: the brightest are of first magnitude, and the faintest of sixth magnitude. Note that the brighter the star, the smaller the value of the magnitude. In 1856, N. R. P ...
Anatomy of a Supernova - hrsbstaff.ednet.ns.ca
... cal combustion theory and terrestrial experiments show that In the late 1980s a new picture combined the strengths of there are two basic types of explosion. The first is called deflaboth models. Today scientists believe tbat a Type Ia supernova gration. Deflagration waves are subsonic and act like ...
... cal combustion theory and terrestrial experiments show that In the late 1980s a new picture combined the strengths of there are two basic types of explosion. The first is called deflaboth models. Today scientists believe tbat a Type Ia supernova gration. Deflagration waves are subsonic and act like ...
Stars
... • Luminosity is measured in units of energy emitted per second, or watts. The Sun’s luminosity is about 3.85 × 1026 W. The values for other stars vary widely, from about 0.0001 to more than 1 million times the Sun’s luminosity. No other stellar property varies as much. ...
... • Luminosity is measured in units of energy emitted per second, or watts. The Sun’s luminosity is about 3.85 × 1026 W. The values for other stars vary widely, from about 0.0001 to more than 1 million times the Sun’s luminosity. No other stellar property varies as much. ...
The Milky Way Model - University of Chicago
... observation wavelength, galactic coordinates and distance, to place them appropriately in your model. Only two angular coordinates are needed to specify the location of any object on the sky, for instance common coordinates used in astronomy are: 1. Azimuth (az) - the angle the object can be found a ...
... observation wavelength, galactic coordinates and distance, to place them appropriately in your model. Only two angular coordinates are needed to specify the location of any object on the sky, for instance common coordinates used in astronomy are: 1. Azimuth (az) - the angle the object can be found a ...
Precision age indicators that exploit chemically peculiar stars
... still of great value, blue photometric colors generally indicate galaxies with ongoing star formation, while red colors indicate galaxies that have not formed significant numbers of stars in the last few hundred million years. A technique that often gives higher precision is using Balmer feature str ...
... still of great value, blue photometric colors generally indicate galaxies with ongoing star formation, while red colors indicate galaxies that have not formed significant numbers of stars in the last few hundred million years. A technique that often gives higher precision is using Balmer feature str ...
13.1 Introduction 13.2 The Red Giant Branch
... An important process experienced by stars while they are in the red giant phase is mass loss. As the stellar luminosity and radius increase while a star evolves along the giant branch, the envelope becomes loosely bound and it is relatively easy for the large photon flux to remove mass from the stel ...
... An important process experienced by stars while they are in the red giant phase is mass loss. As the stellar luminosity and radius increase while a star evolves along the giant branch, the envelope becomes loosely bound and it is relatively easy for the large photon flux to remove mass from the stel ...
PH607lec10-4gal2
... up their gas, have older/redder stars) Late type spirals have substantial on-going star-formation, didn’t form as many stars early-on (and thus lots of gas left) ...
... up their gas, have older/redder stars) Late type spirals have substantial on-going star-formation, didn’t form as many stars early-on (and thus lots of gas left) ...
A Collection of Curricula for the STARLAB Polynesian Voyaging
... For many generations this information was handed down by word of mouth, just as the Hawaiians told their stories and passed along their knowledge. Then, about 130 C.E. (Common Era or A.D.) in Egypt, a writer of scientific information named Ptolemy collected the stories and made a catalog of star gro ...
... For many generations this information was handed down by word of mouth, just as the Hawaiians told their stories and passed along their knowledge. Then, about 130 C.E. (Common Era or A.D.) in Egypt, a writer of scientific information named Ptolemy collected the stories and made a catalog of star gro ...
Facilitator`s Guide
... Introduction: People young and old have always been fascinated and awed by imagining how large and how old the Universe is and how far away the stars and the galaxies are from us. Today, many simply accept these huge numbers they hear as fact, without wondering how they are ascertained. In a typical ...
... Introduction: People young and old have always been fascinated and awed by imagining how large and how old the Universe is and how far away the stars and the galaxies are from us. Today, many simply accept these huge numbers they hear as fact, without wondering how they are ascertained. In a typical ...
ASTRO-114--Lecture 40-
... It’s the size of the distances between the stars. And this cloud has stars forming in it. And in the upper right drawing — or picture; it’s actually a photograph — you see an arrow pointing at a couple of very bright stars that have just recently formed in this cloud. Now, here are a couple of color ...
... It’s the size of the distances between the stars. And this cloud has stars forming in it. And in the upper right drawing — or picture; it’s actually a photograph — you see an arrow pointing at a couple of very bright stars that have just recently formed in this cloud. Now, here are a couple of color ...
The Hipparcos Star Globe Booklet - Cosmos
... gathered data for four years. The satellite span slowly, controlled in such a way as to gradually shift the axis of rotation so that over time the telescope could repeatedly scan the entire celestial sphere. A simultaneous onboard experiment named Tycho was also to provide astrometric and two-colour ...
... gathered data for four years. The satellite span slowly, controlled in such a way as to gradually shift the axis of rotation so that over time the telescope could repeatedly scan the entire celestial sphere. A simultaneous onboard experiment named Tycho was also to provide astrometric and two-colour ...
Planetary Nebula
... Like many other planetary nebulae, IC 4406 exhibits a high degree of symmetry; the left and right halves are nearly mirror images of the other. If we could fly around IC 4406 in a starship, we would see that the gas and dust form a vast donut of material streaming outward from the dying star. This H ...
... Like many other planetary nebulae, IC 4406 exhibits a high degree of symmetry; the left and right halves are nearly mirror images of the other. If we could fly around IC 4406 in a starship, we would see that the gas and dust form a vast donut of material streaming outward from the dying star. This H ...
Is the central binary system of the planetary nebula Henize 2
... weak emission feature in the center of the wide absorption line. This forms a spectral structure similar to that of Henize 2–428. The most noticeable examples of this are the PNe He 2–105, He 2–434, and to some degree SP 3 and PC 12. All these central stars are O stars. To these we add the PN Pa 5, ...
... weak emission feature in the center of the wide absorption line. This forms a spectral structure similar to that of Henize 2–428. The most noticeable examples of this are the PNe He 2–105, He 2–434, and to some degree SP 3 and PC 12. All these central stars are O stars. To these we add the PN Pa 5, ...
night watch - Warren Astronomical Society
... -2The best method for determining the radius of Pluto, as it is for Neptune, is to observe a stellar occultation. It was predicted that Pluto would pass near a 15th magnitude star in 1965, and so the passage was observed very closely by several observatories to see if the star would be occulted. We ...
... -2The best method for determining the radius of Pluto, as it is for Neptune, is to observe a stellar occultation. It was predicted that Pluto would pass near a 15th magnitude star in 1965, and so the passage was observed very closely by several observatories to see if the star would be occulted. We ...
Chapter 26.2 notes
... • A light-year is the distance that light travels in a vacuum in a year, which is about 9.5 trillion kilometers. • Proxima Centauri, the closest star to the sun, is about 4.3 light-years away. ...
... • A light-year is the distance that light travels in a vacuum in a year, which is about 9.5 trillion kilometers. • Proxima Centauri, the closest star to the sun, is about 4.3 light-years away. ...
Corona Australis
Corona Australis /kɵˈroʊnə ɒˈstreɪlɨs/ or Corona Austrina /kɵˈroʊnə ɒˈstraɪnə/ is a constellation in the Southern Celestial Hemisphere. Its Latin name means ""southern crown"", and it is the southern counterpart of Corona Borealis, the northern crown. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The Ancient Greeks saw Corona Australis as a wreath rather than a crown and associated it with Sagittarius or Centaurus. Other cultures have likened the pattern to a turtle, ostrich nest, a tent, or even a hut belonging to a rock hyrax.Although fainter than its namesake, the oval- or horseshoe-shaped pattern of its brighter stars renders it distinctive. Alpha and Beta Coronae Australis are the two brightest stars with an apparent magnitude of around 4.1. Epsilon Coronae Australis is the brightest example of a W Ursae Majoris variable in the southern sky. Lying alongside the Milky Way, Corona Australis contains one of the closest star-forming regions to our Solar System—a dusty dark nebula known as the Corona Australis Molecular Cloud, lying about 430 light years away. Within it are stars at the earliest stages of their lifespan. The variable stars R and TY Coronae Australis light up parts of the nebula, which varies in brightness accordingly.