Discovery of White Dwarfs—1 Oct • Adams’ discovery
... • How much smaller is Sirius B? • Apparent mag of Sirius A is −1.5 • Apparent mag of Sirius B is 8.7 ...
... • How much smaller is Sirius B? • Apparent mag of Sirius A is −1.5 • Apparent mag of Sirius B is 8.7 ...
Hertzsprung–Russell diagram - Wikipedia, the free encyclopedia
... The original diagram displayed the spectral type of stars on the horizontal axis and the absolute visual magnitude on the vertical axis. The spectral type is not a numerical quantity, but the sequence of spectral types is a monotonic series ordered by stellar surface temperature. Modern observationa ...
... The original diagram displayed the spectral type of stars on the horizontal axis and the absolute visual magnitude on the vertical axis. The spectral type is not a numerical quantity, but the sequence of spectral types is a monotonic series ordered by stellar surface temperature. Modern observationa ...
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 ...
2 The Concept of “Spectral Classes”
... All stars including the standards are peculiar at some level. Hence, the most complicated part of any classification system is the array of spectral peculiarities, usually designated by a single letter or character. The descriptions of these attributes, P1P2P3P4, each of which has a value in the ran ...
... All stars including the standards are peculiar at some level. Hence, the most complicated part of any classification system is the array of spectral peculiarities, usually designated by a single letter or character. The descriptions of these attributes, P1P2P3P4, each of which has a value in the ran ...
Stars - Emera Astronomy Center
... State of Maine Learning Results Guiding Principles The lessons in this guide, in combination with Stars, will help students to work towards some of the Guiding Principles set forth by the State of Maine Learning Results. By the simple act of visiting the planetarium, students of all ages open an ave ...
... State of Maine Learning Results Guiding Principles The lessons in this guide, in combination with Stars, will help students to work towards some of the Guiding Principles set forth by the State of Maine Learning Results. By the simple act of visiting the planetarium, students of all ages open an ave ...
identifying seasonal stars in kaurna astronomical traditions
... records. In western Victoria and southeast South Australia many astronomical traditions were recorded but, curiously, some of the brightest stars in the sky were omitted. Scholars claimed these stars did not feature in Aboriginal traditions. This continues to be repeated in the literature, but curre ...
... records. In western Victoria and southeast South Australia many astronomical traditions were recorded but, curiously, some of the brightest stars in the sky were omitted. Scholars claimed these stars did not feature in Aboriginal traditions. This continues to be repeated in the literature, but curre ...
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 ...
Absolute magnitudes and kinematics of barium
... (Jorissen & Boffin 1992) and that the orbital period is related to the orbital separation. It may be possible that mild barium stars have wider separations between components, making more difficult the detection of their binary nature. If we consider the stars with known orbits or with variable radi ...
... (Jorissen & Boffin 1992) and that the orbital period is related to the orbital separation. It may be possible that mild barium stars have wider separations between components, making more difficult the detection of their binary nature. If we consider the stars with known orbits or with variable radi ...
October 2016 BRAS Newsletter - The Baton Rouge Astronomical
... ‘The burst of the century’ “This was the burst of the century!” exclaimed James A. Wren, an engineer at Los Alamos National Laboratory and coauthor of one of the papers. Indeed, GRB 130427A (as it is now called) was the most powerful gamma-ray burst and the secondbrightest optical flash measured in ...
... ‘The burst of the century’ “This was the burst of the century!” exclaimed James A. Wren, an engineer at Los Alamos National Laboratory and coauthor of one of the papers. Indeed, GRB 130427A (as it is now called) was the most powerful gamma-ray burst and the secondbrightest optical flash measured in ...
The Pleiades in the Salle des Taureaux", Grotte de Lascaux
... number eighteen there can be seen a large dark dot with a half bow drawn across it, the eye with the brow (fig. 1). Around it are five spots of medium size and seven or more, smaller ones: a picture which reminds one very much of the distribution of the Hyades around the Aldebarán [87 • Tau (Aldebar ...
... number eighteen there can be seen a large dark dot with a half bow drawn across it, the eye with the brow (fig. 1). Around it are five spots of medium size and seven or more, smaller ones: a picture which reminds one very much of the distribution of the Hyades around the Aldebarán [87 • Tau (Aldebar ...
Chapter 26.2 notes
... Stars are so far away that astronomers cannot measure their distances directly. Astronomers are able to observe stars from two different positions–opposite sides of Earth’s orbit. Nearby stars appear to move against the moredistant background stars. ...
... Stars are so far away that astronomers cannot measure their distances directly. Astronomers are able to observe stars from two different positions–opposite sides of Earth’s orbit. Nearby stars appear to move against the moredistant background stars. ...
Archaeoastronomical Study of the Main Pyramids of Giza
... 2. Comparison between the Positions of the Giza Pyramids and Those of Orion Belt Stars A very famous archaeological site where the astronomical knowledge of the Egyptians, joint to their religious credence, could have played a relevant role in the monument building is the pyramid complex located in ...
... 2. Comparison between the Positions of the Giza Pyramids and Those of Orion Belt Stars A very famous archaeological site where the astronomical knowledge of the Egyptians, joint to their religious credence, could have played a relevant role in the monument building is the pyramid complex located in ...
Andromeda *ruler of men*
... Andromeda is an autumn constellation that is V shaped the best time of year to view Andromeda is during the month of November with the suggested time being 9pm. It occupies 722 square degrees and is located close to the North Pole in the first quadrant of the Northern Hemisphere. Andromeda can be s ...
... Andromeda is an autumn constellation that is V shaped the best time of year to view Andromeda is during the month of November with the suggested time being 9pm. It occupies 722 square degrees and is located close to the North Pole in the first quadrant of the Northern Hemisphere. Andromeda can be s ...
HET603-M05A01: Colours and Spectral Types: Learning about stars
... which allow light to be emitted also vary: some processes get stronger and others get weaker. Different line strengths can also be due to changes in the relative chemical abundance between two stars. The chemical composition of the star and relative elemental abundances can also affect the line stre ...
... which allow light to be emitted also vary: some processes get stronger and others get weaker. Different line strengths can also be due to changes in the relative chemical abundance between two stars. The chemical composition of the star and relative elemental abundances can also affect the line stre ...
26.2 Stars - Clinton Public Schools
... Stars are so far away that astronomers cannot measure their distances directly. Astronomers are able to observe stars from two different positions–opposite sides of Earth’s orbit. Nearby stars appear to move against the moredistant background stars. ...
... Stars are so far away that astronomers cannot measure their distances directly. Astronomers are able to observe stars from two different positions–opposite sides of Earth’s orbit. Nearby stars appear to move against the moredistant background stars. ...
The Hipparcos Star Globe Booklet - Cosmos
... On the Hipparcos Star Globe, the Hipparcos map appears as the clouds of the Milky Way and the brighter point-like stars. Exceptionally bright stars are picked out for a more ‘star chart’-like feature, and the 20 brightest have been labelled. The Hipparcos Star Globe depicts the celestial sphere that ...
... On the Hipparcos Star Globe, the Hipparcos map appears as the clouds of the Milky Way and the brighter point-like stars. Exceptionally bright stars are picked out for a more ‘star chart’-like feature, and the 20 brightest have been labelled. The Hipparcos Star Globe depicts the celestial sphere that ...
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 ...
5 - White Dwarfs - University of Texas Astronomy
... dwarf leading to an increase in the frictional heating and the light output in the process. Detailed studies suggest that the disk-heating instability described in Chapter 4 (see Figure 4.5) is the primary cause of dwarf novae. Matter piles up in the disk in a cool, dim storage phase until the disk ...
... dwarf leading to an increase in the frictional heating and the light output in the process. Detailed studies suggest that the disk-heating instability described in Chapter 4 (see Figure 4.5) is the primary cause of dwarf novae. Matter piles up in the disk in a cool, dim storage phase until the disk ...
Orion the Hunter
... the most casual astronomers. The appearance of a hunter is unmistakable: a group of stars forming a head, four bright quadrilateral stars marking shoulders and knees, three aligned stars constructing his belt, a fainter line of stars (and a bright nebula) outlining a sword, an extended collection of ...
... the most casual astronomers. The appearance of a hunter is unmistakable: a group of stars forming a head, four bright quadrilateral stars marking shoulders and knees, three aligned stars constructing his belt, a fainter line of stars (and a bright nebula) outlining a sword, an extended collection of ...
Ch 11a (Measuring Stars 10-28-10)
... Distance: If you know the parallax “p” (in arcseconds) you can calculate the distance “d” (in parsecs) d=1/p (1parsec= 3.26 lightyears) Apparent brightness: how bright a star looks in the sky The inverse-square Law: light from stars gets fainter as the inverse square of the distance (apparent bri ...
... Distance: If you know the parallax “p” (in arcseconds) you can calculate the distance “d” (in parsecs) d=1/p (1parsec= 3.26 lightyears) Apparent brightness: how bright a star looks in the sky The inverse-square Law: light from stars gets fainter as the inverse square of the distance (apparent bri ...
CONSTELLATION PERSEUS The constellation
... magnitude 1.79. It and many of the surrounding stars are members of an open cluster known as the Alpha Persei Cluster. The best-known star, however, is Algol (Beta Persei), linked with ominous legends because of its variability, which is noticeable to the naked eye. Rather than being an intrinsicall ...
... magnitude 1.79. It and many of the surrounding stars are members of an open cluster known as the Alpha Persei Cluster. The best-known star, however, is Algol (Beta Persei), linked with ominous legends because of its variability, which is noticeable to the naked eye. Rather than being an intrinsicall ...
Science performance of Gaia, ESA`s space
... • Gaia will detect tens of thousands of brown dwarfs, both drifting through space in isolation and in orbit around other stars (Haywood and Jordi 2002). This data is vital for investigating the physics of star formation since brown dwarfs represent stars that “just did not make it” to core hydrogen ...
... • Gaia will detect tens of thousands of brown dwarfs, both drifting through space in isolation and in orbit around other stars (Haywood and Jordi 2002). This data is vital for investigating the physics of star formation since brown dwarfs represent stars that “just did not make it” to core hydrogen ...
1 Introduction - University of Amsterdam
... star phase in which they expel the main part of their outer envelopes. Once the compact helium core is revealed it is identified as a Wolf-Rayet star. The supernova progenitor state (at the top of the diagram) determines the characteristics of the final explosion and therefore also the nature of the ...
... star phase in which they expel the main part of their outer envelopes. Once the compact helium core is revealed it is identified as a Wolf-Rayet star. The supernova progenitor state (at the top of the diagram) determines the characteristics of the final explosion and therefore also the nature of the ...
Harappan Astronomy
... had population densities >3 per m (Kenoyer, 1998, Possehl, 2002, Agarwal, 2007, Wright 2010). Harappan culture evolved and merged and transformed over this period (Gangal et al., 2011), and it also went through a complex evolutionary pattern (Vahia and Yadav, 2011a). It was the most advanced preiron ...
... had population densities >3 per m (Kenoyer, 1998, Possehl, 2002, Agarwal, 2007, Wright 2010). Harappan culture evolved and merged and transformed over this period (Gangal et al., 2011), and it also went through a complex evolutionary pattern (Vahia and Yadav, 2011a). It was the most advanced preiron ...
Canis Minor
Canis Minor /ˌkeɪnɨs ˈmaɪnər/ is a small constellation in the northern celestial hemisphere. In the second century, it was included as an asterism, or pattern, of two stars in Ptolemy's 48 constellations, and it is counted among the 88 modern constellations. Its name is Latin for ""lesser dog"", in contrast to Canis Major, the ""greater dog""; both figures are commonly represented as following the constellation of Orion the hunter.Canis Minor contains only two stars brighter than the fourth magnitude, Procyon (Alpha Canis Minoris), with a magnitude of 0.34, and Gomeisa (Beta Canis Minoris), with a magnitude of 2.9. The constellation's dimmer stars were noted by Johann Bayer, who named eight stars including Alpha and Beta, and John Flamsteed, who numbered fourteen. Procyon is the seventh-brightest star in the night sky, as well as one of the closest. A yellow-white main sequence star, it has a white dwarf companion. Gomeisa is a blue-white main sequence star. Luyten's Star is a ninth-magnitude red dwarf and the Solar System's next closest stellar neighbour in the constellation after Procyon. The fourth-magnitude HD 66141, which has evolved into an orange giant towards the end of its life cycle, was discovered to have a planet in 2012. There are two faint deep sky objects within the constellation's borders. The 11 Canis-Minorids are a meteor shower that can be seen in early December.