Systematics of Galaxy Properties and Scaling Relations Ay 127
... (not separated in the traditional Hubble sequence) ...
... (not separated in the traditional Hubble sequence) ...
Why Study Binary Stars?
... The amount of light lost depends on eclipsed area & temperature The area covered at each minimum is the same Depth of the minimum depends on eclipsed star’s temperature Primary eclipse is always when the hotter star is behind the cooler star ...
... The amount of light lost depends on eclipsed area & temperature The area covered at each minimum is the same Depth of the minimum depends on eclipsed star’s temperature Primary eclipse is always when the hotter star is behind the cooler star ...
here in Powerpoint format
... bA is the apparent brightness of star A bB is the apparent brightness of star B mA is the apparent magnitude of star A mB is the apparent magnitude of star B ...
... bA is the apparent brightness of star A bB is the apparent brightness of star B mA is the apparent magnitude of star A mB is the apparent magnitude of star B ...
The correct answers are written in bold, italic and underlined. The
... • At the very bottom of the main sequence, massive stars being cool because of their great mass • At the very top of the main sequence, massive stars being very hot and active • In the middle of the main sequence, with very hot but less massive stars positioned higher and massive red giant stars pos ...
... • At the very bottom of the main sequence, massive stars being cool because of their great mass • At the very top of the main sequence, massive stars being very hot and active • In the middle of the main sequence, with very hot but less massive stars positioned higher and massive red giant stars pos ...
answer key
... main sequence, the cooler K and M type stars have less mass than our Sun. The small energy release per unit time leads to low luminosities for these stars, so they have very long lifetimes. Many of the K and M type stars now seen in the sky will shine on for at least another trillion years. (Yeah. T ...
... main sequence, the cooler K and M type stars have less mass than our Sun. The small energy release per unit time leads to low luminosities for these stars, so they have very long lifetimes. Many of the K and M type stars now seen in the sky will shine on for at least another trillion years. (Yeah. T ...
Reach for the Stars B
... 20. Which portion of the EM spectrum was this image taken in? 21. Which DSO is depicted in Image [7]? 22. What is special about the stars forming here? 23. Which DSO is depicted in Image [8]? 24. Stars like this DSO can undergo sudden outbursts where their brightness varies wildly. What are they cal ...
... 20. Which portion of the EM spectrum was this image taken in? 21. Which DSO is depicted in Image [7]? 22. What is special about the stars forming here? 23. Which DSO is depicted in Image [8]? 24. Stars like this DSO can undergo sudden outbursts where their brightness varies wildly. What are they cal ...
Astronomy and Space articles
... The effect is easy to understand if you imagine holding a torch very close to your eyes. It could be quite dazzling, but if the torch were held hundreds of metres away it would look far, far less bright, and there would be a distance at which you would not be able to see the light of the torch at al ...
... The effect is easy to understand if you imagine holding a torch very close to your eyes. It could be quite dazzling, but if the torch were held hundreds of metres away it would look far, far less bright, and there would be a distance at which you would not be able to see the light of the torch at al ...
The Lifecycle of the Stars
... Nuclear Fusiona nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy http://dictionary.reference.com/search?q=Nuclear+fusion ...
... Nuclear Fusiona nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy http://dictionary.reference.com/search?q=Nuclear+fusion ...
Stellar Evolution - University of California, Santa Cruz
... • We can use the H-R Diagram of the stars in a cluster to determine the age of the cluster. • A cluster starts off with stars along the full main sequence. • Because stars with larger mass evolve more quickly, the hot, luminous end of the main sequence becomes depleted with time. • The `main-sequenc ...
... • We can use the H-R Diagram of the stars in a cluster to determine the age of the cluster. • A cluster starts off with stars along the full main sequence. • Because stars with larger mass evolve more quickly, the hot, luminous end of the main sequence becomes depleted with time. • The `main-sequenc ...
1 WHY DO THE STARS IN ORION LOOK SO DIFFERENT FROM
... Luminosity shows the relationship of stars’ radii and surface temperature. Each of the stars in Table 1 is many times more luminous than our sun, and emits enormous amounts of energy. Luminosity is related to a stars surface area and temperature. Two stars having the same temperature and size will b ...
... Luminosity shows the relationship of stars’ radii and surface temperature. Each of the stars in Table 1 is many times more luminous than our sun, and emits enormous amounts of energy. Luminosity is related to a stars surface area and temperature. Two stars having the same temperature and size will b ...
How are stars formed
... Vast clouds of gas & dust lie between stars Diffuse hydrogen clouds: dozens of pc across • Less dense than a laboratory vacuum on Earth!!! ...
... Vast clouds of gas & dust lie between stars Diffuse hydrogen clouds: dozens of pc across • Less dense than a laboratory vacuum on Earth!!! ...
Planets and Moons - Fraser Heights Chess Club
... and billions of stars held together by gravity. One galaxy can have hundreds of billions of stars and be as large as 200,000 light years across. • Galaxy is derived from the Greek galaxias meaning "milky", a reference to the Milky Way. • Many galaxies are believed to have black holes at their active ...
... and billions of stars held together by gravity. One galaxy can have hundreds of billions of stars and be as large as 200,000 light years across. • Galaxy is derived from the Greek galaxias meaning "milky", a reference to the Milky Way. • Many galaxies are believed to have black holes at their active ...
The Milky Way and Its Neighbors
... 2)Mapping HII regions via Hα emission lines - HII regions trace active star formation Old data showed that there were 4 arms New data from Spitzer indicates that there are only 2 major spiral arms: -Scutum and Perseus Arms ...
... 2)Mapping HII regions via Hα emission lines - HII regions trace active star formation Old data showed that there were 4 arms New data from Spitzer indicates that there are only 2 major spiral arms: -Scutum and Perseus Arms ...
answers2006_07_BC
... masses, from its arrival on the main sequence to the end of fusion processes, including an account of the remnant left after fusion stops. Include a sketch of its trajectory on the HR diagram, and where possible relate your description to the features of the HIPPARCOS ...
... masses, from its arrival on the main sequence to the end of fusion processes, including an account of the remnant left after fusion stops. Include a sketch of its trajectory on the HR diagram, and where possible relate your description to the features of the HIPPARCOS ...
Why are Binary Stars so Important for the Theory
... 1I1 and the masses ('= 2.30 Mol are very nearly equal and known to an accuracy of 1 %. The primary minimum is a total eclipse and the luminosity ratio of the components is known very precisely. The photometric elements are derived by the classical Russell-Merrill method and by the modern model-simul ...
... 1I1 and the masses ('= 2.30 Mol are very nearly equal and known to an accuracy of 1 %. The primary minimum is a total eclipse and the luminosity ratio of the components is known very precisely. The photometric elements are derived by the classical Russell-Merrill method and by the modern model-simul ...
Stellar Evolution - Lick Observatory
... • We can use the H-R Diagram of the stars in a cluster to determine the age of the cluster. • A cluster starts off with stars along the full main sequence. • Because stars with larger mass evolve more quickly, the hot, luminous end of the main sequence becomes depleted with time. • The `main-sequenc ...
... • We can use the H-R Diagram of the stars in a cluster to determine the age of the cluster. • A cluster starts off with stars along the full main sequence. • Because stars with larger mass evolve more quickly, the hot, luminous end of the main sequence becomes depleted with time. • The `main-sequenc ...
Hubble`s Expansion of the Universe
... but external to it. Others disagreed, thinking that these spiral objects were clouds of gas within our Milky Way galaxy, believing that our galaxy was the only one in the Universe. This argument continued into the 1920s, until the American astronomer Edwin Hubble measured the distance to one of thes ...
... but external to it. Others disagreed, thinking that these spiral objects were clouds of gas within our Milky Way galaxy, believing that our galaxy was the only one in the Universe. This argument continued into the 1920s, until the American astronomer Edwin Hubble measured the distance to one of thes ...
ASTR 1101-001 Spring 2008 - Louisiana State University
... • Easily (and now frequently) detected in other galaxies. (Statistically, every galaxy should display 1-3 supernovae every 100 yrs.) • The light display from each SN generally can be categorized as one of several standard “types”: – Type Ia – Type Ib, Ic – Type II ...
... • Easily (and now frequently) detected in other galaxies. (Statistically, every galaxy should display 1-3 supernovae every 100 yrs.) • The light display from each SN generally can be categorized as one of several standard “types”: – Type Ia – Type Ib, Ic – Type II ...
Cartwheel Galaxy - Chandra X
... 8. Is there an X-ray candidate for an active galactic nucleus (AGN) in Arp 147? Explain. 9. Why might there not be new star formation in the elliptical galaxy on the left? 10. A study of ULXs has determined that very few X-ray sources with luminosity greater than 1040 erg s−1 remain after ~15 Myr a ...
... 8. Is there an X-ray candidate for an active galactic nucleus (AGN) in Arp 147? Explain. 9. Why might there not be new star formation in the elliptical galaxy on the left? 10. A study of ULXs has determined that very few X-ray sources with luminosity greater than 1040 erg s−1 remain after ~15 Myr a ...
Chapter 12
... absolute magnitudes accurately because there are actually two different types of Cepheid variables. Cepheid I stars are brighter than Cepheid II stars (for the same period) by about a factor of 4 (or 1.5 magnitudes). Cepheid I stars are younger and metal richer than Cepheid II stars. 9. Another grou ...
... absolute magnitudes accurately because there are actually two different types of Cepheid variables. Cepheid I stars are brighter than Cepheid II stars (for the same period) by about a factor of 4 (or 1.5 magnitudes). Cepheid I stars are younger and metal richer than Cepheid II stars. 9. Another grou ...
supplemental educational materials PDF
... Science Institute are astronomers. Astronomers from all over the world use the Hubble Space Telescope. ...
... Science Institute are astronomers. Astronomers from all over the world use the Hubble Space Telescope. ...
File
... Once born, stars are self-illuminating…they ____________________________________________! Main sequence = ______________ yellow stars (like our sun!) + ______________ blue stars As a star runs out of energy, it ______________ into a red ______________ or a red ______________________ After stars die, ...
... Once born, stars are self-illuminating…they ____________________________________________! Main sequence = ______________ yellow stars (like our sun!) + ______________ blue stars As a star runs out of energy, it ______________ into a red ______________ or a red ______________________ After stars die, ...
The Sun and Stars The Sun is a typical star with a mass of about 2
... For the fusion reaction to occur very high temperatures are needed, on the order of 107 K, which are achieved in the core of the star. The sun’s luminosity of L = 3.8 × 1026 Watts is produced by transforming 4.5 × 109 kilograms of mass into energy each second due to the fusion of 600 million metric ...
... For the fusion reaction to occur very high temperatures are needed, on the order of 107 K, which are achieved in the core of the star. The sun’s luminosity of L = 3.8 × 1026 Watts is produced by transforming 4.5 × 109 kilograms of mass into energy each second due to the fusion of 600 million metric ...
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.