Life Cycle of a Star
... • Red giant- very bright, once an average star, but is now close to end of life - Has expanded to many times its original size (heat causes it to expand) - Hydrogen core has turned to helium and eventually to carbon - Our sun will become a red giant star in about 5 billion years ...
... • Red giant- very bright, once an average star, but is now close to end of life - Has expanded to many times its original size (heat causes it to expand) - Hydrogen core has turned to helium and eventually to carbon - Our sun will become a red giant star in about 5 billion years ...
HR Diagram Lab Handout
... Brightness: the number of times brighter the star is than our Sun (a fractions means it is dimmer than our Sun) Expected Lifetime: the number of years the star is expected to exist based on color and brightness Getting Started: Making the HR Diagram 1. Hand out the “stars” to each member of your ...
... Brightness: the number of times brighter the star is than our Sun (a fractions means it is dimmer than our Sun) Expected Lifetime: the number of years the star is expected to exist based on color and brightness Getting Started: Making the HR Diagram 1. Hand out the “stars” to each member of your ...
Document
... Stages in the Life Cycles of Stars – Over time a giant star sheds it outer layers and becomes a whitedwarf – the dead core of a giant star – Although no fusion occurs in white dwarfs, they remain hot for billions of ...
... Stages in the Life Cycles of Stars – Over time a giant star sheds it outer layers and becomes a whitedwarf – the dead core of a giant star – Although no fusion occurs in white dwarfs, they remain hot for billions of ...
What is Epsilon Aurigae?
... • Very massive?, could it form planets? • Low mass? , could it form planets? •Is there a central object(s)? • Disk Morphology? Disk, “donut”, ring, gaps? Thick, thin? etc.. ...
... • Very massive?, could it form planets? • Low mass? , could it form planets? •Is there a central object(s)? • Disk Morphology? Disk, “donut”, ring, gaps? Thick, thin? etc.. ...
Name: Candle Spectra Lab Objective: Students will be able to
... Based on your knowledge of the Nebular Theory, which states that our small Sun and its surrounding planets were created by the supernova of a massive star, develop a SPECTRA (with the hypothesized elemental lines) as well as the type, color and temperature of the star that erupted 4.6 billion years ...
... Based on your knowledge of the Nebular Theory, which states that our small Sun and its surrounding planets were created by the supernova of a massive star, develop a SPECTRA (with the hypothesized elemental lines) as well as the type, color and temperature of the star that erupted 4.6 billion years ...
Chapter 10: The Stars
... • If the distance to Star A is 10 times greater than the distance to star B, and the 2 stars have the same luminosity, how would their apparent brightness compare? ...
... • If the distance to Star A is 10 times greater than the distance to star B, and the 2 stars have the same luminosity, how would their apparent brightness compare? ...
Lecture Summary (11/22)
... by hydrogen fusion as helium nuclei build up in the core. With a drop in energy, the outward force cannot balance the inward force. Gravity causes collapse that heats the interior, and in a shell surrounding the helium core hydrogen fusion begins again. The outer layers of the Sun will expand at thi ...
... by hydrogen fusion as helium nuclei build up in the core. With a drop in energy, the outward force cannot balance the inward force. Gravity causes collapse that heats the interior, and in a shell surrounding the helium core hydrogen fusion begins again. The outer layers of the Sun will expand at thi ...
Brightness + Magnitude of Stars
... A. Apparent or Relative Brightness-(cont.) *** As distance to Star Decreases brightness Increases (Inverse Relationship) *** As Luminosity of Star increases brightness Increases (Direct Relationship) B. Apparent Magnitude A number assigned to a celestial object that is a measure of its relative br ...
... A. Apparent or Relative Brightness-(cont.) *** As distance to Star Decreases brightness Increases (Inverse Relationship) *** As Luminosity of Star increases brightness Increases (Direct Relationship) B. Apparent Magnitude A number assigned to a celestial object that is a measure of its relative br ...
III. Contents of The Universe
... arms containing gas and dust stars form in arms young stars are blue central bulge ...
... arms containing gas and dust stars form in arms young stars are blue central bulge ...
epsilon Aur
... Epsilon Aurigae is not the brightest eclipsing binary, nor is it the one with the deepest eclipses. What makes it distinctive is its long period of over 27 years, coupled with the mystery surrounding the nature of the secondary object in the system. The last primary eclipse took place during 1982-84 ...
... Epsilon Aurigae is not the brightest eclipsing binary, nor is it the one with the deepest eclipses. What makes it distinctive is its long period of over 27 years, coupled with the mystery surrounding the nature of the secondary object in the system. The last primary eclipse took place during 1982-84 ...
RMH_Stellar_Evolution_Ast2001_09_29_09
... Indirect: -- must know distance Luminosity – depends on surface area (size) and temperature (Stefan-Boltzman Law) Mass -- with luminosity + physics , mass – luminosity relation ...
... Indirect: -- must know distance Luminosity – depends on surface area (size) and temperature (Stefan-Boltzman Law) Mass -- with luminosity + physics , mass – luminosity relation ...
The 22 First Magnitude Stars
... • Changes orientation of equatorial coordinate system • Pole star changes (Thuban Polaris Vega) • Vernal equinox (“first point of Aries”) is now in Pisces; moving westward into Aquarius • Tropics of Cancer/Capricorn are really Gemini/Sagittarius today • Star charts change orientation or Epoch (1 ...
... • Changes orientation of equatorial coordinate system • Pole star changes (Thuban Polaris Vega) • Vernal equinox (“first point of Aries”) is now in Pisces; moving westward into Aquarius • Tropics of Cancer/Capricorn are really Gemini/Sagittarius today • Star charts change orientation or Epoch (1 ...
![Lectures 10 & 11 powerpoint (stellar formation) [movie below]](http://s1.studyres.com/store/data/008083226_1-fec717da713794a7feea61d4eec0ceb1-300x300.png)
Lectures 10 & 11 powerpoint (stellar formation) [movie below]
... Hot (T ~ a few 1000 K), ionized hydrogen (HII); low density (n ~ 0.1 atom/cm3); gas can remain ionized because of very low density. ...
... Hot (T ~ a few 1000 K), ionized hydrogen (HII); low density (n ~ 0.1 atom/cm3); gas can remain ionized because of very low density. ...
astr100_finalexam
... D) around a single point in space, the presumed location of the original Big Bang that created the Universe. [23] Current evidence indicates the Universe’s expansion ____. A) is speeding up B) is slowing down C) has stopped D) is constant [24] Where are we? A) At the exact center of an expanding Uni ...
... D) around a single point in space, the presumed location of the original Big Bang that created the Universe. [23] Current evidence indicates the Universe’s expansion ____. A) is speeding up B) is slowing down C) has stopped D) is constant [24] Where are we? A) At the exact center of an expanding Uni ...
The Stars
... the main sequence. • Generally, the hotter the star, the more luminous it will be. • The main sequence is not a straight line but a band. ...
... the main sequence. • Generally, the hotter the star, the more luminous it will be. • The main sequence is not a straight line but a band. ...
ASTRONOMY 12 Problem Set 4 – Due March 10, 2016 1) After
... (i.e., 200 AU). Assuming these values for the temperature (as measured e.g., by Wien’s Law) and the radius, calculate the luminosity of the supernova in erg s−1 and in solar luminosities. In what part of the HR diagram would supernovae be found (upper left, upper right, lower left, or lower right?). ...
... (i.e., 200 AU). Assuming these values for the temperature (as measured e.g., by Wien’s Law) and the radius, calculate the luminosity of the supernova in erg s−1 and in solar luminosities. In what part of the HR diagram would supernovae be found (upper left, upper right, lower left, or lower right?). ...
`earthlike` and second the probability that they have suitable climate
... It is an almost universal solvent, dissolving nearly everything. This property is traced to the large electric dipole moment of the water molecule as I will explain. It has an extremely high heat capacity, which can again be understood in terms of the structure of the molecules. ...
... It is an almost universal solvent, dissolving nearly everything. This property is traced to the large electric dipole moment of the water molecule as I will explain. It has an extremely high heat capacity, which can again be understood in terms of the structure of the molecules. ...
Neutron Stars
... Upper mass limit of Neutron Stars • In Neutron stars the gravity is balanced by two forces. – Degenerate neutron pressure – Strong nuclear force. ...
... Upper mass limit of Neutron Stars • In Neutron stars the gravity is balanced by two forces. – Degenerate neutron pressure – Strong nuclear force. ...
Quiz Questions
... C. because this is the only place in the Sun where the requisite catalysts (C, N, and O) exist in sufficient quantities to permit fusion to occur D. because the requisite conditions of high temperature and high density only occur there 5. The main sequence turnoff point in the H-R diagram of a star ...
... C. because this is the only place in the Sun where the requisite catalysts (C, N, and O) exist in sufficient quantities to permit fusion to occur D. because the requisite conditions of high temperature and high density only occur there 5. The main sequence turnoff point in the H-R diagram of a star ...
STELLAR EVOLUTION
... physics as we understand those laws. Computational models which predict the lifetimes and properties of stars of all masses. Astronomers then match these predictions with observed populations of stars, especially the stars found within clusters. Observations of the temperature, density, and moti ...
... physics as we understand those laws. Computational models which predict the lifetimes and properties of stars of all masses. Astronomers then match these predictions with observed populations of stars, especially the stars found within clusters. Observations of the temperature, density, and moti ...
Lyra
Lyra (/ˈlaɪərə/; Latin for lyre, from Greek λύρα) is a small constellation. It is one of 48 listed by the 2nd century astronomer Ptolemy, and is one of the 88 constellations recognized by the International Astronomical Union. Lyra was often represented on star maps as a vulture or an eagle carrying a lyre, and hence sometimes referred to as Aquila Cadens or Vultur Cadens. Beginning at the north, Lyra is bordered by Draco, Hercules, Vulpecula, and Cygnus. Lyra is visible from the northern hemisphere from spring through autumn, and nearly overhead, in temperate latitudes, during the summer months. From the southern hemisphere, it is visible low in the northern sky during the winter months.The lucida or brightest star—and one of the brightest stars in the sky—is the white main sequence star Vega, a corner of the Summer Triangle. Beta Lyrae is the prototype of a class of stars known as Beta Lyrae variables, binary stars so close to each other that they become egg-shaped and material flows from one to the other. Epsilon Lyrae, known informally as the Double Double, is a complex multiple star system. Lyra also hosts the Ring Nebula, the second-discovered and best-known planetary nebula.