Quasars: Back to the Infant Universe
... a spectrum is taken, a quasar looks nothing like a star ...
... a spectrum is taken, a quasar looks nothing like a star ...
LESSON 8: STARS
... that they do not release energy in nuclear reactions and produce no heat. With the end of energy production in the core, it no longer produces enough heat to generate adequate inner pressure to match the enormous gravitational pull. At this stage the core is so incredibly dense that it cannot collap ...
... that they do not release energy in nuclear reactions and produce no heat. With the end of energy production in the core, it no longer produces enough heat to generate adequate inner pressure to match the enormous gravitational pull. At this stage the core is so incredibly dense that it cannot collap ...
January 2014 Astronomy Calendar by Dave Mitsky Some
... of the month. It is at both aphelion (249.3 million kilometers or 154.9 million miles from the Sun) and western quadrature on January 2nd. Mars can be found 1.4 degrees southeast of the thirdmagnitude binary star Porrima (Gamma Virginis) on the morning of January 1st and four degrees north of the Mo ...
... of the month. It is at both aphelion (249.3 million kilometers or 154.9 million miles from the Sun) and western quadrature on January 2nd. Mars can be found 1.4 degrees southeast of the thirdmagnitude binary star Porrima (Gamma Virginis) on the morning of January 1st and four degrees north of the Mo ...
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. ...
The old globular cluster system of the dIrr galaxy NGC 1427A in the
... (Bureau et al. 1996), which is ∼ 600 km/s higher than that of the cD elliptical NGC 1399 (1430±9 km/s), located at the cluster center, and twice larger than the cluster velocity dispersion (σv = 325 km/s, Ferguson & Sandage 1990). Such a large peculiar velocity is shared also by other cluster member ...
... (Bureau et al. 1996), which is ∼ 600 km/s higher than that of the cD elliptical NGC 1399 (1430±9 km/s), located at the cluster center, and twice larger than the cluster velocity dispersion (σv = 325 km/s, Ferguson & Sandage 1990). Such a large peculiar velocity is shared also by other cluster member ...
here - Diana`s Fixed Stars
... things. This is just one component describing some challenges in these areas. DKR: Well, if we just focus on the Fixed Star Baiten Kaitos at his Midheaven, we would say there is some point where he is abandoned on a desert island, so to speak, and has some puzzlement as to how to handle his life fro ...
... things. This is just one component describing some challenges in these areas. DKR: Well, if we just focus on the Fixed Star Baiten Kaitos at his Midheaven, we would say there is some point where he is abandoned on a desert island, so to speak, and has some puzzlement as to how to handle his life fro ...
Magnitude Scales and Photometric Systems
... they are more sensitive to blue light or to red light than is the eye. The advent of photography in the late 19th century revolutionized astronomy, as did the introduction of photomultiplier tubes with their lightsensitive photocathodes in the mid-20th century and sensors such as silicon charge-coup ...
... they are more sensitive to blue light or to red light than is the eye. The advent of photography in the late 19th century revolutionized astronomy, as did the introduction of photomultiplier tubes with their lightsensitive photocathodes in the mid-20th century and sensors such as silicon charge-coup ...
presentation (PPT format)
... the Hubble speed is much greater than any intrinsic motions that the galaxies might have • The value of H0? Depends on the determination of the distance (vary depending on the technique between 40100km/s/Mpc) • Because the value of H0 is somewhat uncertain usually • We express the distance in terms ...
... the Hubble speed is much greater than any intrinsic motions that the galaxies might have • The value of H0? Depends on the determination of the distance (vary depending on the technique between 40100km/s/Mpc) • Because the value of H0 is somewhat uncertain usually • We express the distance in terms ...
Sample pages 1 PDF
... At about 3◦ in angular width, you need a very wide field of view if you want to see the whole thing in its entirety. In practice very few telescopes other than short focal length refractors or Newtonian reflectors provide anything like the necessary fields of view, and certainly not the popular SCT ...
... At about 3◦ in angular width, you need a very wide field of view if you want to see the whole thing in its entirety. In practice very few telescopes other than short focal length refractors or Newtonian reflectors provide anything like the necessary fields of view, and certainly not the popular SCT ...
Nazwy gwiazd nieba północnego o etymologii arabskiej
... Nazwy gwiazd nieba północnego o etymologii arabskiej została wykonana samodzielnie i nie zawiera treści uzyskanych w sposób niezgodny z obowiązującymi przepisami Oświadczam również, że przedstawiona praca nie była wcześniej przedmiotem procedur związanych z uzyskaniem tytułu zawodowego w uczelni. Oś ...
... Nazwy gwiazd nieba północnego o etymologii arabskiej została wykonana samodzielnie i nie zawiera treści uzyskanych w sposób niezgodny z obowiązującymi przepisami Oświadczam również, że przedstawiona praca nie była wcześniej przedmiotem procedur związanych z uzyskaniem tytułu zawodowego w uczelni. Oś ...
ppt document - FacStaff Home Page for CBU
... Do galaxies cluster together like stars do? When we look around, we do indeed see that galaxies appear in clusters, and appear to orbit one another by their mutual gravity. The Milky Way is one of about 40 or so galaxies that form the Local Group. Andromeda (another spiralB galaxy about 2 million li ...
... Do galaxies cluster together like stars do? When we look around, we do indeed see that galaxies appear in clusters, and appear to orbit one another by their mutual gravity. The Milky Way is one of about 40 or so galaxies that form the Local Group. Andromeda (another spiralB galaxy about 2 million li ...
Open access - ORBi
... have a rather large χ2r of about 2.6. We will therefore not consider these two detections as significant, all the more that the most significantly negative excess in our sample (ι Vir) is precisely at the −3σ level. We are therefore left with 12 significant detections of K-band circumstellar excess aro ...
... have a rather large χ2r of about 2.6. We will therefore not consider these two detections as significant, all the more that the most significantly negative excess in our sample (ι Vir) is precisely at the −3σ level. We are therefore left with 12 significant detections of K-band circumstellar excess aro ...
Introduction to Galaxies - West Jefferson Local Schools
... The further away the galaxy, the faster it is receding from us. (more on this later…) ...
... The further away the galaxy, the faster it is receding from us. (more on this later…) ...
star - Cloudfront.net
... The star continues to collapse inward until it cannot be pressed down any further. b. What is left is an extremely dense core of matter known as a white dwarf. c. A white dwarf is about the size of Earth and still shines for billions of years before it cools completely. d. As it cools, a white dwarf ...
... The star continues to collapse inward until it cannot be pressed down any further. b. What is left is an extremely dense core of matter known as a white dwarf. c. A white dwarf is about the size of Earth and still shines for billions of years before it cools completely. d. As it cools, a white dwarf ...
Lab PDF - NMSU Astronomy
... to get these lines back. The Sun appears on the line labeled 1.0 R" . All stars of this size, regardless of their luminosity or surface temperature, will lie along this line. In which corner of the diagram (upper right, upper left, lower right, or lower left) would stars with radii 1000 times large ...
... to get these lines back. The Sun appears on the line labeled 1.0 R" . All stars of this size, regardless of their luminosity or surface temperature, will lie along this line. In which corner of the diagram (upper right, upper left, lower right, or lower left) would stars with radii 1000 times large ...
Presentation - Relativity Group
... • The key is that all stars were not born at the same time. • the stars which 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 stellar community • ...
... • The key is that all stars were not born at the same time. • the stars which 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 stellar community • ...
Chapter 1: Introduction to Galaxies File - QMplus
... with the result that elliptical galaxies contain almost only old stars. Their colours are therefore red. K-type giant stars dominate the visible light, and their optical spectra are broadly similar to K-type stars, with no emission lines from an interstellar medium: the spectra have absorption lines ...
... with the result that elliptical galaxies contain almost only old stars. Their colours are therefore red. K-type giant stars dominate the visible light, and their optical spectra are broadly similar to K-type stars, with no emission lines from an interstellar medium: the spectra have absorption lines ...
A-level Physics (Specification A) Teacher guide Teacher guide
... In the first chapter, students see how some of the optics topics they have studied earlier in the specification are applied to the design of telescopes. The relative merits of the two basic methods – reflecting and refracting – are discussed as well as the influence the design of the telescopes has ...
... In the first chapter, students see how some of the optics topics they have studied earlier in the specification are applied to the design of telescopes. The relative merits of the two basic methods – reflecting and refracting – are discussed as well as the influence the design of the telescopes has ...
134-Notes-a
... retina is deficient in rods, so your low-light sensitivity is actually off-center (i.e., looking slightly away from an object makes it appear brighter). Figure 2 shows the relative responses of the rods and cones to light of various optical wavelengths. Aside from these limitations of your eyes, the ...
... retina is deficient in rods, so your low-light sensitivity is actually off-center (i.e., looking slightly away from an object makes it appear brighter). Figure 2 shows the relative responses of the rods and cones to light of various optical wavelengths. Aside from these limitations of your eyes, the ...
Astro 6590: Galaxies and the Universe Astro
... Properties of galaxies and clusters of galaxies which must be explained. 4. The luminosity function (LF) of galaxies is distinctly nonGaussian with a long tail extending to low luminosities. LF: Number density of galaxies per unit L φ(L)dL ~ Lα eL/L* dL φ(M)dM ~ 10-0.4(α+1)M exp(-100.4(M*-M)) dL Pre ...
... Properties of galaxies and clusters of galaxies which must be explained. 4. The luminosity function (LF) of galaxies is distinctly nonGaussian with a long tail extending to low luminosities. LF: Number density of galaxies per unit L φ(L)dL ~ Lα eL/L* dL φ(M)dM ~ 10-0.4(α+1)M exp(-100.4(M*-M)) dL Pre ...
HR Diagram Explorer
... An actual HR Diagram is provided in the upper right panel with an active location indicated by a red x. This active location can be dragged around the diagram. The options panel allows you control the variables plotted on the x-axis: (temperature, B-V, or spectral type) and those plotted on the y-ax ...
... An actual HR Diagram is provided in the upper right panel with an active location indicated by a red x. This active location can be dragged around the diagram. The options panel allows you control the variables plotted on the x-axis: (temperature, B-V, or spectral type) and those plotted on the y-ax ...
Chapter 26: Stars, Galaxies, and the Universe Stars
... Stars are made mostly of hydrogen and helium. These are both very lightweight gases. However, there is so much hydrogen and helium in a star that the weight of these gases is enormous. In the center of a star, the pressure is great enough to heat the gases and cause nuclear fusion reactions. In a nu ...
... Stars are made mostly of hydrogen and helium. These are both very lightweight gases. However, there is so much hydrogen and helium in a star that the weight of these gases is enormous. In the center of a star, the pressure is great enough to heat the gases and cause nuclear fusion reactions. In a nu ...
Star formation in galaxies over the last 10 billion
... structure (galaxies) from the early homogeneous Universe, we need to simulate Dark Matter. Outcome depends strongly on the structure/geometry of the Universe and the content of Dark Matter ...
... structure (galaxies) from the early homogeneous Universe, we need to simulate Dark Matter. Outcome depends strongly on the structure/geometry of the Universe and the content of Dark Matter ...
CELESTIAL MANUAL:CELESTIAL MANUAL
... Wipe any dirt or moisture such as perspiration from the case and crystal with a soft cloth. Remove any dirt from a leather band with a dry cloth. For a metallic, plastic or rubber watchband wipe with a damp cloth. Remove the small amounts of dirt trapped between the crevices of the metallic band wit ...
... Wipe any dirt or moisture such as perspiration from the case and crystal with a soft cloth. Remove any dirt from a leather band with a dry cloth. For a metallic, plastic or rubber watchband wipe with a damp cloth. Remove the small amounts of dirt trapped between the crevices of the metallic band wit ...
Aries (constellation)
Aries is one of the constellations of the zodiac. It is located in the northern celestial hemisphere between Pisces to the west and Taurus to the east. The name Aries is Latin for ram, and its symbol is 20px (Unicode ♈), representing a ram's horns. It is one of the 48 constellations described by the 2nd century astronomer Ptolemy, and remains one of the 88 modern constellations. It is a mid-sized constellation, ranking 39th overall size, with an area of 441 square degrees (1.1% of the celestial sphere).Although Aries came to represent specifically the ram whose fleece became the Golden Fleece of Ancient Greek mythology, it has represented a ram since late Babylonian times. Before that, the stars of Aries formed a farmhand. Different cultures have incorporated the stars of Aries into different constellations including twin inspectors in China and a porpoise in the Marshall Islands. Aries is a relatively dim constellation, possessing only four bright stars: Hamal (Alpha Arietis, second magnitude), Sheratan (Beta Arietis, third magnitude), Mesarthim (Gamma Arietis, fourth magnitude), and 41 Arietis (also fourth magnitude). The few deep-sky objects within the constellation are quite faint and include several pairs of interacting galaxies. Several meteor showers appear to radiate from Aries, including the Daytime Arietids and the Epsilon Arietids.