Review Sheet and Study Hints - Tufts Institute of Cosmology
... draw the position of main sequence stars, white dwarfs, giants and supergiants, horizontal branch stars, variable stars, protostars draw evolutionary tracks in the HRD for stars of different masses comment on relative evolutionary time-scales globular cluster HRD’s main sequence turnoff and ...
... draw the position of main sequence stars, white dwarfs, giants and supergiants, horizontal branch stars, variable stars, protostars draw evolutionary tracks in the HRD for stars of different masses comment on relative evolutionary time-scales globular cluster HRD’s main sequence turnoff and ...
Stars change over their life cycles.
... Unlike our Sun, most stars do not exist alone. Instead, they are grouped with one or more companion stars. The stars are held together by the force of gravity between them. A binary star system consists of two stars that orbit each other. A multiple star system consists of more than two stars. In ma ...
... Unlike our Sun, most stars do not exist alone. Instead, they are grouped with one or more companion stars. The stars are held together by the force of gravity between them. A binary star system consists of two stars that orbit each other. A multiple star system consists of more than two stars. In ma ...
the stars - Uni Heidelberg
... milestone in the history of our understanding of how stars work and evolve. If used in the classroom, the meaning of temperature, color and luminosity should be explained before performing the use case. It is required to draw coordinate points on a diagram. The level of the UC is intermediate. 1 Int ...
... milestone in the history of our understanding of how stars work and evolve. If used in the classroom, the meaning of temperature, color and luminosity should be explained before performing the use case. It is required to draw coordinate points on a diagram. The level of the UC is intermediate. 1 Int ...
Our Place in Space
... This activity consists of a series of 15 cards that include images of astronomical objects on the front and information about these objects on the reverse. The card backs include information on the location of the object, its size, and its distance from Earth. Teachers should print out the card ...
... This activity consists of a series of 15 cards that include images of astronomical objects on the front and information about these objects on the reverse. The card backs include information on the location of the object, its size, and its distance from Earth. Teachers should print out the card ...
THE STARS G. Iafrate(a), M. Ramella(a) and V. Bologna(b) (a) INAF
... by hydrogen. The fusion of four atoms of hydrogen into one of helium is the main process. The net energy of an helium atom is lower than the sum of the energies of 4 atoms of hydrogen, the excess energy is radiated as radiation. A star spends most of its life in a steady phase, corresponding to the ...
... by hydrogen. The fusion of four atoms of hydrogen into one of helium is the main process. The net energy of an helium atom is lower than the sum of the energies of 4 atoms of hydrogen, the excess energy is radiated as radiation. A star spends most of its life in a steady phase, corresponding to the ...
Observing the Night Sky - Constellations
... be the belt of the hunter. To the north and a little east of Orion's right shoulder, is the bright star Betelguese, which is distinctly red in color. Below the belt and to the west is another very bright star, Rigel, which is almost blue in color. The Orion nebula, a giant gas cloud within which hun ...
... be the belt of the hunter. To the north and a little east of Orion's right shoulder, is the bright star Betelguese, which is distinctly red in color. Below the belt and to the west is another very bright star, Rigel, which is almost blue in color. The Orion nebula, a giant gas cloud within which hun ...
Compact stars
... In certain binary stars containing a white dwarf, mass is transferred from the companion star onto the white dwarf, eventually pushing it over the Chandrasekhar limit. Electrons react with protons to form neutrons and thus no longer supply the necessary pressure to resist gravity, causing the star t ...
... In certain binary stars containing a white dwarf, mass is transferred from the companion star onto the white dwarf, eventually pushing it over the Chandrasekhar limit. Electrons react with protons to form neutrons and thus no longer supply the necessary pressure to resist gravity, causing the star t ...
Today: Magnitude Terminology Photometry Applications Reading
... Calibrated Magnitude: physically meaningful brightness of a star calibrated relative to the known flux standard (e.g. Vega); typically obtained by calculating differential magnitude w.r.t. a known standard star. ...
... Calibrated Magnitude: physically meaningful brightness of a star calibrated relative to the known flux standard (e.g. Vega); typically obtained by calculating differential magnitude w.r.t. a known standard star. ...
Searching for Dwarf Galaxies and Population III Star
... chemically enriched by earlier supernovae. However, the easiest regions to characterize at early times are volumes that have been ionized by flux from nearby, bright galaxies or proto-clusters of galaxies. This project is a search for tiny, star-forming dwarf galaxies in regions around very luminous ...
... chemically enriched by earlier supernovae. However, the easiest regions to characterize at early times are volumes that have been ionized by flux from nearby, bright galaxies or proto-clusters of galaxies. This project is a search for tiny, star-forming dwarf galaxies in regions around very luminous ...
AST4930 Star and Planet Formation
... enough that these objects are already on the main sequence as soon as the stellar system is non embedded. ...
... enough that these objects are already on the main sequence as soon as the stellar system is non embedded. ...
Chapter 16 Star Birth Where do stars form? Star
... • Elements like carbon and oxygen had not yet been made when the first stars formed • Without CO molecules to provide cooling, the clouds that formed the first stars had to be considerably warmer than today’s molecular clouds • The first stars must therefore have been more massive than most of today ...
... • Elements like carbon and oxygen had not yet been made when the first stars formed • Without CO molecules to provide cooling, the clouds that formed the first stars had to be considerably warmer than today’s molecular clouds • The first stars must therefore have been more massive than most of today ...
June 2015 - Bristol Astronomical Society
... arabic name, is one of the largest stars known, with a diameter of around 500 times that of our Sun. In common with most giant stars it varies its size, changing in brightness as it does so from 3rd to 4th magnitude (see p 25). The Globular Cluster M13 is easily found on the western side of the Herc ...
... arabic name, is one of the largest stars known, with a diameter of around 500 times that of our Sun. In common with most giant stars it varies its size, changing in brightness as it does so from 3rd to 4th magnitude (see p 25). The Globular Cluster M13 is easily found on the western side of the Herc ...
Chapter 16 Star Birth
... • Without CO molecules to provide cooling, the clouds that formed the first stars had to be considerably warmer than today’s molecular clouds • The first stars must therefore have been more massive than most of today’s stars, for gravity to overcome pressure ...
... • Without CO molecules to provide cooling, the clouds that formed the first stars had to be considerably warmer than today’s molecular clouds • The first stars must therefore have been more massive than most of today’s stars, for gravity to overcome pressure ...
The H-R Diagram
... other lines. Called them “F stars” • Yellow stars, with prominent double line in the yellow part of spectrum. Called them “G stars”. • Orange stars, with very weak H lines and tons of other lines. Skip some more letters and call them “K stars”. • Red stars, with no H lines, tons of lines, even big t ...
... other lines. Called them “F stars” • Yellow stars, with prominent double line in the yellow part of spectrum. Called them “G stars”. • Orange stars, with very weak H lines and tons of other lines. Skip some more letters and call them “K stars”. • Red stars, with no H lines, tons of lines, even big t ...
h-r_diagram_online_lab
... “Type” column for “Table 2: Nearby Stars” are set as your X values, and cells within the “log (L/Lsun)” column for “Table 2: Nearby Stars” are set as your Y values. (Define the x values by clicking on the little red, white and blue box. Now highlight the “Type” values only on the original sheet unde ...
... “Type” column for “Table 2: Nearby Stars” are set as your X values, and cells within the “log (L/Lsun)” column for “Table 2: Nearby Stars” are set as your Y values. (Define the x values by clicking on the little red, white and blue box. Now highlight the “Type” values only on the original sheet unde ...
Comet Lulin - indstate.edu
... Since Comet Lulin will be moving opposite the motion of the Earth, it will appear to approach us and move away especially fast. Beginning in February 2009, Comet Lulin will rise at about midnight local time, and will be about 6th or 7th magnitude. This won't be bright enough to go out and look at ...
... Since Comet Lulin will be moving opposite the motion of the Earth, it will appear to approach us and move away especially fast. Beginning in February 2009, Comet Lulin will rise at about midnight local time, and will be about 6th or 7th magnitude. This won't be bright enough to go out and look at ...
Active Galactic Nuclei
... • Early radio telescopes found radio emission from stars, nebulae, and some galaxies. • There were also point-like, or star-like, radio sources which varied rapidly these are the `quasi-stellar’ radio sources or quasars. • In visible light quasars appear as points, like stars. ...
... • Early radio telescopes found radio emission from stars, nebulae, and some galaxies. • There were also point-like, or star-like, radio sources which varied rapidly these are the `quasi-stellar’ radio sources or quasars. • In visible light quasars appear as points, like stars. ...
Lec8_2D
... spectroscopic binary. If one star is much fainter than the other, you may not see its lines. The object is then a singleline spectroscopic binary. If both sets of lines are seen, then it’s called a double-line spectroscopic binary. ...
... spectroscopic binary. If one star is much fainter than the other, you may not see its lines. The object is then a singleline spectroscopic binary. If both sets of lines are seen, then it’s called a double-line spectroscopic binary. ...
document
... Andromeda’s disk is now believed to span as much as 228,000 light years in width. Andromeda’s disk is also about twice as large as the Milky Way’s. The brightest star cloud in Andromeda is NGC 206. There are two “dust rings” in Andromeda’s disk caused by a head on collision with a neighboring dwarf ...
... Andromeda’s disk is now believed to span as much as 228,000 light years in width. Andromeda’s disk is also about twice as large as the Milky Way’s. The brightest star cloud in Andromeda is NGC 206. There are two “dust rings” in Andromeda’s disk caused by a head on collision with a neighboring dwarf ...
April - Magic Valley Astronomical Society
... Azores, the northern Caribbean, southern Canada, the contiguous United States, northern Mexico, and Hawaii, at 22:00 4/11 Venus is at its greatest heliocentric latitude south at 18:00 4/12 The Moon is 6.0 degrees south of the bright open cluster M35 in Gemini at 12:00; the periodic comet 9P/Tempel 1 ...
... Azores, the northern Caribbean, southern Canada, the contiguous United States, northern Mexico, and Hawaii, at 22:00 4/11 Venus is at its greatest heliocentric latitude south at 18:00 4/12 The Moon is 6.0 degrees south of the bright open cluster M35 in Gemini at 12:00; the periodic comet 9P/Tempel 1 ...
Document
... • Bright (V ~ 21 at 110 kpc) • Variable stars (P ~ 0.6 day) with distinct light curves ( ~1 mag amplitude) → easily identifiable ...
... • Bright (V ~ 21 at 110 kpc) • Variable stars (P ~ 0.6 day) with distinct light curves ( ~1 mag amplitude) → easily identifiable ...
Properties of Stars - Indiana State University
... Temperature’s Effect on Spectra • Consequently, absorption lines will be present or absent depending on the presence or absence of an electron at the right energy level and this is very much dependent on temperature • Adjusting for temperature, a star’s composition can be found – interestingly, vir ...
... Temperature’s Effect on Spectra • Consequently, absorption lines will be present or absent depending on the presence or absence of an electron at the right energy level and this is very much dependent on temperature • Adjusting for temperature, a star’s composition can be found – interestingly, vir ...
Spiral structure of the Third Galactic Quadrant and the solution to the
... caught in the process of merging with the Milky Way, the hunt for other such accretion events has become a very active field of astrophysical research. The identification of a stellar ring-like structure in Monoceros, spanning more than 100 degrees (Newberg et al. 2002), and the detection of an over ...
... caught in the process of merging with the Milky Way, the hunt for other such accretion events has become a very active field of astrophysical research. The identification of a stellar ring-like structure in Monoceros, spanning more than 100 degrees (Newberg et al. 2002), and the detection of an over ...
Distant Stars - How far away is it
... RR Lyrae – 854 light years RR Lyrae is a variable star like Delta Cephei. As the brightest star in its class, it became the namesake for the RR Lyrae variable class of stars. The relationship between pulsation period and absolute magnitude of RR Lyraes makes them good standard candles. They are not ...
... RR Lyrae – 854 light years RR Lyrae is a variable star like Delta Cephei. As the brightest star in its class, it became the namesake for the RR Lyrae variable class of stars. The relationship between pulsation period and absolute magnitude of RR Lyraes makes them good standard candles. They are not ...
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.