Stars A globular cluster is a tightly grouped swarm of stars held
... The second brightest star in a constellation is usually designated beta, the second letter of the Greek alphabet, the third brightest is gamma, and so on. The assignment of Greek letters to stars continues until all the Greek letters are used. Numerical designations follow. But the number of known s ...
... The second brightest star in a constellation is usually designated beta, the second letter of the Greek alphabet, the third brightest is gamma, and so on. The assignment of Greek letters to stars continues until all the Greek letters are used. Numerical designations follow. But the number of known s ...
Procedurally Generating an Artificial Galaxy
... These two statistics can be put into an equation to determine the comparative density of stars in a given square in Figure 1. Imagine a slice of the spiral and make a graph out of it. Put distance to the core on the horizontal axis and density of stars on the vertical axis. The shape of the graph wi ...
... These two statistics can be put into an equation to determine the comparative density of stars in a given square in Figure 1. Imagine a slice of the spiral and make a graph out of it. Put distance to the core on the horizontal axis and density of stars on the vertical axis. The shape of the graph wi ...
ASTRO-114--Lecture 40-
... almost as if they were living beings. Now we don’t really think that stars are living beings, but we still use those kinds of terms. And that’s because stars do not stay the same all the time. They start out looking one way. As they get older they change. And as they continue to get very old they ch ...
... almost as if they were living beings. Now we don’t really think that stars are living beings, but we still use those kinds of terms. And that’s because stars do not stay the same all the time. They start out looking one way. As they get older they change. And as they continue to get very old they ch ...
Cepheid Calibration
... and pushes galaxies apart at an accelerating rate. Two separate teams of astronomers discovered dark energy in 1998, using Hubble and ground-based observatories to make careful measurements of the brightness of distant exploding stars. This was one of the most surprising and profound discoveries of ...
... and pushes galaxies apart at an accelerating rate. Two separate teams of astronomers discovered dark energy in 1998, using Hubble and ground-based observatories to make careful measurements of the brightness of distant exploding stars. This was one of the most surprising and profound discoveries of ...
the magellanic clouds newsletter - Keele University Astrophysics
... We present the Planck catalogue of Galactic Cold Clumps (PGCC), an all-sky catalogue of Galactic cold clump candidates detected by Planck. This catalogue is the full version of the Early Cold Core (ECC) catalogue, which was made available in 2011 with the Early Release Compact Source Catalogue (ERCS ...
... We present the Planck catalogue of Galactic Cold Clumps (PGCC), an all-sky catalogue of Galactic cold clump candidates detected by Planck. This catalogue is the full version of the Early Cold Core (ECC) catalogue, which was made available in 2011 with the Early Release Compact Source Catalogue (ERCS ...
Star Magnitude - ScienceEducationatNewPaltz
... the scale has been extended in both directions. Dimmer stars are assigned magnitudes larger than 6 ( 6, 7, 8, 9, ... 30th ... etc.) The Hubble Space Telescope Deep Field image contains some galaxies as faint as 30th magnitude. First magnitude stars are corrected across the scale of 1, 0, -1 with the ...
... the scale has been extended in both directions. Dimmer stars are assigned magnitudes larger than 6 ( 6, 7, 8, 9, ... 30th ... etc.) The Hubble Space Telescope Deep Field image contains some galaxies as faint as 30th magnitude. First magnitude stars are corrected across the scale of 1, 0, -1 with the ...
The Sculptor dwarf irregular galaxy SDIG: present and past
... October 2 with intermittent cloud cover and seeing of 0.9 arcsec. The log of the observations is given in Table 2. Throughout the night of September 30, we regularly observed photometric standard stars listed in the IRIS User's Guide (Allen 1993). The images of SDIG were taken in sets of four, with ...
... October 2 with intermittent cloud cover and seeing of 0.9 arcsec. The log of the observations is given in Table 2. Throughout the night of September 30, we regularly observed photometric standard stars listed in the IRIS User's Guide (Allen 1993). The images of SDIG were taken in sets of four, with ...
Dancing with Stars 3 Dancing with Stars Binary Stellar Evolution 1
... each star, accounting for the complexities of the fact that each star is moving in orbit, you find that the boundary of the two regions, seen in cross section, resembles a figure eight turned on its side. The two halves of the figure are called Roche lobes after the German scientist who first worked ...
... each star, accounting for the complexities of the fact that each star is moving in orbit, you find that the boundary of the two regions, seen in cross section, resembles a figure eight turned on its side. The two halves of the figure are called Roche lobes after the German scientist who first worked ...
The Origin, Structure, and Evolution of the Stars
... large only three thousand are visible at any one time but with the aid of even small telescopes it is possible to observe a million stars and we are able to photograph well over a hundred million stars with a 200 inch telescope at mount palomar all these stars belong to a unit in space that we commo ...
... large only three thousand are visible at any one time but with the aid of even small telescopes it is possible to observe a million stars and we are able to photograph well over a hundred million stars with a 200 inch telescope at mount palomar all these stars belong to a unit in space that we commo ...
AAVSO: Mu Cephei, October 2002 Variable Star Of The Month
... The pulsations in Mu Cep, although relatively small, have driven off the outer parts of the star, producing a shell of dust and gas around this variable. One interesting observation is that there are water vapor bands found in emission in the spectrum of Mu Cep. Although the presence of water has be ...
... The pulsations in Mu Cep, although relatively small, have driven off the outer parts of the star, producing a shell of dust and gas around this variable. One interesting observation is that there are water vapor bands found in emission in the spectrum of Mu Cep. Although the presence of water has be ...
Understanding the H-R Diagram
... formed and by its evolutionary stage (its "growth" stage). In general, the more massive a star is, the hottest its surface." 1 In other words, how hot, how luminous and which stages a star will go through and eventually become (its life span) is dependent upon the star's original mass at the time of ...
... formed and by its evolutionary stage (its "growth" stage). In general, the more massive a star is, the hottest its surface." 1 In other words, how hot, how luminous and which stages a star will go through and eventually become (its life span) is dependent upon the star's original mass at the time of ...
ASTRO-114--Lecture 37-
... sky than those that were visible to the naked eye. In order to be listed as a Greek letter or a number, the star pretty well had to be visible to the naked eye. But when we started having larger and larger telescopes, astronomers wanted to name many stars that were not visible to the naked eye. And ...
... sky than those that were visible to the naked eye. In order to be listed as a Greek letter or a number, the star pretty well had to be visible to the naked eye. But when we started having larger and larger telescopes, astronomers wanted to name many stars that were not visible to the naked eye. And ...
Ptolemy: on trial for fraud
... 22⁄3 centuries between 129 BC and AD 137, forever depriving science of fundamental inforin a manner that resulted in too small a solar the epoch for which Ptolemy’s catalogue was mation about an important area of astronomy longitude by about 1°, Dreyer showed, all of prepared. The actual amount of p ...
... 22⁄3 centuries between 129 BC and AD 137, forever depriving science of fundamental inforin a manner that resulted in too small a solar the epoch for which Ptolemy’s catalogue was mation about an important area of astronomy longitude by about 1°, Dreyer showed, all of prepared. The actual amount of p ...
Asteroseismology of Solar-Like Stars
... made about temperature, pressure, mass, age, rotation and internal structre of the star. The understanding behind oscillations within stars has increased dramatically over the past two decades due to extensive research of the excellent data provided by recent space-based missions. The most recent of ...
... made about temperature, pressure, mass, age, rotation and internal structre of the star. The understanding behind oscillations within stars has increased dramatically over the past two decades due to extensive research of the excellent data provided by recent space-based missions. The most recent of ...
KINEMATIC DISCOVERY OF A STELLAR STREAM LOCATED IN
... (0 < log g < 4.0) from the Sloan Digital Sky Survey Data Release 8 (SDSS DR8) spectroscopic data in the south Galactic hemisphere. The Cetus stream was clearly present in velocity versus Galactic latitude plots of these stars, along with an additional feature consisting of a few stars clumped at vgs ...
... (0 < log g < 4.0) from the Sloan Digital Sky Survey Data Release 8 (SDSS DR8) spectroscopic data in the south Galactic hemisphere. The Cetus stream was clearly present in velocity versus Galactic latitude plots of these stars, along with an additional feature consisting of a few stars clumped at vgs ...
The Significance of Mega Stars
... expansion of consciousness to include the whole of the Milky Way galaxy, not just the Orion Arm. The famous Bayer catalog of stars compiled in 1603 by Johann Bayer assigns Greek letters to the brightest stars visible in each constellation, usually in descending order of apparent brightness (but Bay ...
... expansion of consciousness to include the whole of the Milky Way galaxy, not just the Orion Arm. The famous Bayer catalog of stars compiled in 1603 by Johann Bayer assigns Greek letters to the brightest stars visible in each constellation, usually in descending order of apparent brightness (but Bay ...
Stories in the Stars
... I’d also like to thank Sherwood Harrington, coordinator of the astronomy program at DeAnza College, Cupertino, California, for his generous assistance with the astronomy portions of both the series itself and the teaching guide, and Brian Fies, who also helped troubleshoot the astronomy sections. ...
... I’d also like to thank Sherwood Harrington, coordinator of the astronomy program at DeAnza College, Cupertino, California, for his generous assistance with the astronomy portions of both the series itself and the teaching guide, and Brian Fies, who also helped troubleshoot the astronomy sections. ...
Abundances of RGB stars in NGC 6752 Grundahl
... which correlate with c1 ? We note that for other clusters the available spectroscopic material for Mg, Na, O and Al in stars fainter than the RGB bump is still very limited. Briley et al. (1996) found significant Na variations, correlated with CN-band strength in 47 Tuc ([Fe/H] = –0.8) turn-off star ...
... which correlate with c1 ? We note that for other clusters the available spectroscopic material for Mg, Na, O and Al in stars fainter than the RGB bump is still very limited. Briley et al. (1996) found significant Na variations, correlated with CN-band strength in 47 Tuc ([Fe/H] = –0.8) turn-off star ...
Precision age indicators that exploit chemically peculiar stars
... Tracing stellar population age by integrated light is a mainstay of galaxy evolution interpretation. Somewhat ambiguously, yet still of great value, blue photometric colors generally indicate galaxies with ongoing star formation, while red colors indicate galaxies that have not formed significant nu ...
... Tracing stellar population age by integrated light is a mainstay of galaxy evolution interpretation. Somewhat ambiguously, yet still of great value, blue photometric colors generally indicate galaxies with ongoing star formation, while red colors indicate galaxies that have not formed significant nu ...
Stellar Properties
... How can we study the “Life Cycles” of stars? • Key: All stars were NOT born at the same time. • stars we see today are at different stages in their lives • we observe only a brief moment in any one star’s life • by studying large numbers of stars, we get a “snapshot” of one moment in the history of ...
... How can we study the “Life Cycles” of stars? • Key: All stars were NOT born at the same time. • stars we see today are at different stages in their lives • we observe only a brief moment in any one star’s life • by studying large numbers of stars, we get a “snapshot” of one moment in the history of ...
The Star Finder Book - Starpath School of Navigation
... After teaching celestial navigation to over 3,000 students during the past 6 years, we have well learned the recurring questions. We especially appreciate questions and comments of former students after they navigate their first ocean crossing. Comments from new navigators are invaluable to the deve ...
... After teaching celestial navigation to over 3,000 students during the past 6 years, we have well learned the recurring questions. We especially appreciate questions and comments of former students after they navigate their first ocean crossing. Comments from new navigators are invaluable to the deve ...
The First Stars in the Universe
... date from about a billion years after the big bang (assuming a present age for the universe of 13.7 billion years). Researchers will need better telescopes to see more distant objects dating from still earlier times. Cosmologists, however, can make deductions about the early universe based on the co ...
... date from about a billion years after the big bang (assuming a present age for the universe of 13.7 billion years). Researchers will need better telescopes to see more distant objects dating from still earlier times. Cosmologists, however, can make deductions about the early universe based on the co ...
Star formation PowerPoint
... until it is in equilibrium. This is stage 7: The star has reached the main sequence and will remain there as long as it has hydrogen to fuse. ...
... until it is in equilibrium. This is stage 7: The star has reached the main sequence and will remain there as long as it has hydrogen to fuse. ...
Star catalogue
A star catalogue, or star catalog, is an astronomical catalogue that lists stars. In astronomy, many stars are referred to simply by catalogue numbers. There are a great many different star catalogues which have been produced for different purposes over the years, and this article covers only some of the more frequently quoted ones. Star catalogues were compiled by many different ancient peoples, including the Babylonians, Greeks, Chinese, Persians, and Arabs. Most modern catalogues are available in electronic format and can be freely downloaded from NASA's Astronomical Data Center.Completeness and accuracy is described by the weakest apparent magnitude V (largest number) and the accuracy of the positions.