Homework #3, AST 1002
... Which of the following is (are) correct? (a) Energy is transported from the Sun's core to its surface primarily by a process called convection. (b) It takes about five minutes for energy from the Sun's core to reach its surface. (c) The proton cycle describes the process of energy production in the ...
... Which of the following is (are) correct? (a) Energy is transported from the Sun's core to its surface primarily by a process called convection. (b) It takes about five minutes for energy from the Sun's core to reach its surface. (c) The proton cycle describes the process of energy production in the ...
File
... Pegasus the winged horse, is a constellation that appears in the south when its autumn for the northern latitudes. The geometrical figure is called “ The great square of Pegasus”. To the observers on earth, the winged horse Pegasus appears to be flying upside down. The vernal equinox, the sun’s loca ...
... Pegasus the winged horse, is a constellation that appears in the south when its autumn for the northern latitudes. The geometrical figure is called “ The great square of Pegasus”. To the observers on earth, the winged horse Pegasus appears to be flying upside down. The vernal equinox, the sun’s loca ...
Lecture 14
... • Most binaries are too far away to see both stars separately. • But, you can detect their orbital motions by the periodic Doppler shifts of their spectral lines. – Determine the orbital period & size from velocities. ...
... • Most binaries are too far away to see both stars separately. • But, you can detect their orbital motions by the periodic Doppler shifts of their spectral lines. – Determine the orbital period & size from velocities. ...
lecture course
... undergoing nuclear fusion and releasing energy in the form of (mostly visible) electromagnetic waves. They have masses typically 0.1 to 100 times the mass of the sun, and have a blackbody spectrum that peaks at longer wavelengths for lower mass stars (it peaks at about 500 nm for the Sun). The evolu ...
... undergoing nuclear fusion and releasing energy in the form of (mostly visible) electromagnetic waves. They have masses typically 0.1 to 100 times the mass of the sun, and have a blackbody spectrum that peaks at longer wavelengths for lower mass stars (it peaks at about 500 nm for the Sun). The evolu ...
Chapter 1 Telescopes 1.1 Lenses
... the diameter of the objective of a telescope, the greater the number of stars that can be seen. Planets and other astronomical objects in the solar system are magnified using a telescope (unlike stars which are point objects and are seen through telescopes as point images no matter how large the mag ...
... the diameter of the objective of a telescope, the greater the number of stars that can be seen. Planets and other astronomical objects in the solar system are magnified using a telescope (unlike stars which are point objects and are seen through telescopes as point images no matter how large the mag ...
Chapter 15 Stars, Galaxies, and Universe
... Structure of the Milky Way Our solar system is located in a spiral galaxy called the Milky Way. From the side, the Milky Way appears to be a narrow disk with a bulge in the middle. The galaxy’s spiral structure is visible only from above or below. Center is 25,000 light years away from Earth ...
... Structure of the Milky Way Our solar system is located in a spiral galaxy called the Milky Way. From the side, the Milky Way appears to be a narrow disk with a bulge in the middle. The galaxy’s spiral structure is visible only from above or below. Center is 25,000 light years away from Earth ...
Stars, Galaxies, Superuniverses and the Urantia Book, by Frederick
... "Your world, Urantia, is one of many similar inhabited planets which comprise the local universe of Nebadon. This universe, together with similar creations, makes up the superuniverse of Orvonton, from whose capital, Uversa, our commission hails. Orvonton is one of the seven evolutionary superuniver ...
... "Your world, Urantia, is one of many similar inhabited planets which comprise the local universe of Nebadon. This universe, together with similar creations, makes up the superuniverse of Orvonton, from whose capital, Uversa, our commission hails. Orvonton is one of the seven evolutionary superuniver ...
Nazwy gwiazd nieba północnego o etymologii arabskiej
... 2.12.1 ALPHEKKA (Alpha Coronae Borealis)..........................................................24 2.12.2 NUSAKAN (Beta Coronae Borealis)..............................................................24 2.13 CYGNUS..................................................................................... ...
... 2.12.1 ALPHEKKA (Alpha Coronae Borealis)..........................................................24 2.12.2 NUSAKAN (Beta Coronae Borealis)..............................................................24 2.13 CYGNUS..................................................................................... ...
Chapter 15 Normal and Active Galaxies
... e) they are dense concentrations of millions of stars. ...
... e) they are dense concentrations of millions of stars. ...
Super-solar Metal Abundances in Two Galaxies at ζ ∼ 3.57
... and effective Doppler parameter b > 30 km s−1 ; Spitzer 1978). For stronger lines, the COG gives reliable results if several lines with different oscillator strengths of the same ion are detected. This idea is supported, for instance, by the spectral analysis of the afterglow of GRB 081008 by D’Elia ...
... and effective Doppler parameter b > 30 km s−1 ; Spitzer 1978). For stronger lines, the COG gives reliable results if several lines with different oscillator strengths of the same ion are detected. This idea is supported, for instance, by the spectral analysis of the afterglow of GRB 081008 by D’Elia ...
Polaris
... our sun. A close companion, Polaris Ab, orbits 2 billion miles from Polaris. Much farther away, near the top of the illustration at right, is the third companion Polaris B. Polaris B is located approximately 240 billion miles from Polaris A. The two companion stars are the same temperature as Polari ...
... our sun. A close companion, Polaris Ab, orbits 2 billion miles from Polaris. Much farther away, near the top of the illustration at right, is the third companion Polaris B. Polaris B is located approximately 240 billion miles from Polaris A. The two companion stars are the same temperature as Polari ...
Chapter 26.2 notes
... Most stars are found along a diagonal band running from the bright hot stars on the upper left to the dim cool stars on the lower right. Astronomers call this diagonal band on the H-R diagram the main sequence. About 90% of all stars are found on the main sequence. The sun lies near the middle of th ...
... Most stars are found along a diagonal band running from the bright hot stars on the upper left to the dim cool stars on the lower right. Astronomers call this diagonal band on the H-R diagram the main sequence. About 90% of all stars are found on the main sequence. The sun lies near the middle of th ...
October 2016 BRAS Newsletter - The Baton Rouge Astronomical
... on telescopes both on the ground and in space. Exultant astronomers worldwide captured data at visible, X-ray, gamma-ray, and radio wavelengths from telescopes both on the ground and in space. Three independent RAPTOR (Rapid Telescopes for Optical Response) full-sky monitoring telescopes—two in New ...
... on telescopes both on the ground and in space. Exultant astronomers worldwide captured data at visible, X-ray, gamma-ray, and radio wavelengths from telescopes both on the ground and in space. Three independent RAPTOR (Rapid Telescopes for Optical Response) full-sky monitoring telescopes—two in New ...
26.2 Stars - Clinton Public Schools
... Most stars are found along a diagonal band running from the bright hot stars on the upper left to the dim cool stars on the lower right. Astronomers call this diagonal band on the H-R diagram the main sequence. About 90% of all stars are found on the main sequence. The sun lies near the middle of th ...
... Most stars are found along a diagonal band running from the bright hot stars on the upper left to the dim cool stars on the lower right. Astronomers call this diagonal band on the H-R diagram the main sequence. About 90% of all stars are found on the main sequence. The sun lies near the middle of th ...
Chapter 16--Properties of Stars
... century, humans classified stars primarily by their brightness and location in our sky. The names of the brightest stars within each constellation still bear Greek letters designating their order of brightness. For example, the brightest star in the constellation Centaurus is Alpha Centauri, the sec ...
... century, humans classified stars primarily by their brightness and location in our sky. The names of the brightest stars within each constellation still bear Greek letters designating their order of brightness. For example, the brightest star in the constellation Centaurus is Alpha Centauri, the sec ...
Collisions and Encounters of Stellar Systems
... processes of growing strength. These include steady tidal forces from the host galaxy, and rapidly varying forces as the smaller halo passes through the pericenter of its orbit. As stars are lost from the satellite, they spread out in long, thin tidal streamers that can provide vivid evidence of ong ...
... processes of growing strength. These include steady tidal forces from the host galaxy, and rapidly varying forces as the smaller halo passes through the pericenter of its orbit. As stars are lost from the satellite, they spread out in long, thin tidal streamers that can provide vivid evidence of ong ...
Jul y 9- 11,
... central supermassive black holes (SMBHs) will be more often present even in smaller galaxies when seeds are generated from the remnants of the first massive stars rather than via direct gas collapse. Consequently, measurement of the local occupation fraction provides an observational discriminator b ...
... central supermassive black holes (SMBHs) will be more often present even in smaller galaxies when seeds are generated from the remnants of the first massive stars rather than via direct gas collapse. Consequently, measurement of the local occupation fraction provides an observational discriminator b ...
Exploring the Universe
... • All stars are made up of hot, glowing gases • Stars can appear red, blue or yellow based on surface temperature – Hottest stars are blue, coolest are red – Hertzspurg-Russel diagram classifies stars • 90° of stars are called the main sequence • Other stars include red giants, supergiants, and dwar ...
... • All stars are made up of hot, glowing gases • Stars can appear red, blue or yellow based on surface temperature – Hottest stars are blue, coolest are red – Hertzspurg-Russel diagram classifies stars • 90° of stars are called the main sequence • Other stars include red giants, supergiants, and dwar ...
Article PDF - IOPscience
... Wide Field Planetary Camera 2 (WFPC2) archive observations. However, the number of phase points and the time window of these archive data were too sparse to allow the derivation of the variable stars’ periods. Thus, we do not know yet whether the M31 GCs show the Oosterhoff dichotomy, or whether ind ...
... Wide Field Planetary Camera 2 (WFPC2) archive observations. However, the number of phase points and the time window of these archive data were too sparse to allow the derivation of the variable stars’ periods. Thus, we do not know yet whether the M31 GCs show the Oosterhoff dichotomy, or whether ind ...
On the nature and detectability of Type Ib/c supernova progenitors
... have inflated envelopes for most of their lifetimes, the inflation disappears as they lose most of their helium envelopes and their cores become more compact during the late evolutionary stages. Gräfener & Hamann (2005) showed that these compact stars form hot WR-type winds driven by the radiative ...
... have inflated envelopes for most of their lifetimes, the inflation disappears as they lose most of their helium envelopes and their cores become more compact during the late evolutionary stages. Gräfener & Hamann (2005) showed that these compact stars form hot WR-type winds driven by the radiative ...
mg_colloq - University of Massachusetts Amherst
... Detection rate of individual sources is about 6% for both compact, 4% for non compact Consistent with the small incidence of AGN among LBG Absence of evidence is NOT evidence of absence, but presence of AGN does not seem obvious ...
... Detection rate of individual sources is about 6% for both compact, 4% for non compact Consistent with the small incidence of AGN among LBG Absence of evidence is NOT evidence of absence, but presence of AGN does not seem obvious ...
Ardua et Astra: On the Calculation of the Dates of the Rising and
... In what follows, I use the terminology in the first column of Table One: it has the significant advantage of being clear and practical, and also corresponds to the terms used by the Greeks themselves in the earliest extant handbooks.16 The terms ‘heliacal’, ‘acronychal’ and ‘cosmical’ are by contras ...
... In what follows, I use the terminology in the first column of Table One: it has the significant advantage of being clear and practical, and also corresponds to the terms used by the Greeks themselves in the earliest extant handbooks.16 The terms ‘heliacal’, ‘acronychal’ and ‘cosmical’ are by contras ...
Lec10_ch12_deathofstars
... • Will the Sun end its existence? If so, how? – The Sun will shed its outer layers as a planetary nebula in about 7 billions years. Its remnant white dwarf, with fusion ceased, will dim over the next several billion years ...
... • Will the Sun end its existence? If so, how? – The Sun will shed its outer layers as a planetary nebula in about 7 billions years. Its remnant white dwarf, with fusion ceased, will dim over the next several billion years ...
1: Properties of Pulsars
... The following animations demonstrate that pulsars concentrate so much mass that they are almost black holes. In fact, if a pulsar would have only twice as much mass, a collapse to a black hole could probably not be prevented. Both animations are based on correct calculations in the frame work of gen ...
... The following animations demonstrate that pulsars concentrate so much mass that they are almost black holes. In fact, if a pulsar would have only twice as much mass, a collapse to a black hole could probably not be prevented. Both animations are based on correct calculations in the frame work of gen ...
Serpens
Serpens (""the Serpent"", Greek Ὄφις) is a constellation of the northern hemisphere. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations defined by the International Astronomical Union. It is unique among the modern constellations in being split into two non-contiguous parts, Serpens Caput (Serpent's Head) to the west and Serpens Cauda (Serpent's Tail) to the east. Between these two halves lies the constellation of Ophiuchus, the ""Serpent-Bearer"". In figurative representations, the body of the serpent is represented as passing behind Ophiuchus between Mu Serpentis in Serpens Caput and Nu Serpentis in Serpens Cauda.The brightest star in Serpens is the red giant star Alpha Serpentis, or Unukalhai, in Serpens Caput, with an apparent magnitude of 2.63. Also located in Serpens Caput are the naked-eye globular cluster Messier 5 and the naked-eye variables R Serpentis and Tau4 Serpentis. Notable extragalactic objects include Seyfert's Sextet, one of the densest galaxy clusters known; Arp 220, the prototypical ultraluminous infrared galaxy; and Hoag's Object, the most famous of the very rare class of galaxies known as ring galaxies.Part of the Milky Way's galactic plane passes through Serpens Cauda, which is therefore rich in galactic deep-sky objects, such as the Eagle Nebula (IC 4703) and its associated star cluster Messier 16. The nebula measures 70 light-years by 50 light-years and contains the Pillars of Creation, three dust clouds that became famous for the image taken by the Hubble Space Telescope. Other striking objects include the Red Square Nebula, one of the few objects in astronomy to take on a square shape; and Westerhout 40, a massive nearby star-forming region consisting of a molecular cloud and an H II region.