HR Diagram and Stellar Fusion
... H-R Diagram named for… • …Ejnar Hertzsprung and H. N. Russell, graph (see illustration) showing the luminosity of a star as a function of its surface temperature. The luminosity, or absolute magnitude, increases upwards on the vertical axis; the temperature (or some temperature-dependent characteri ...
... H-R Diagram named for… • …Ejnar Hertzsprung and H. N. Russell, graph (see illustration) showing the luminosity of a star as a function of its surface temperature. The luminosity, or absolute magnitude, increases upwards on the vertical axis; the temperature (or some temperature-dependent characteri ...
Astronomy Study Guide
... Apparent brightness—the brightness of a star as seen from Earth Absolute brightness—a star’s brightness as if it were a standard distance from Earth Constellation—an imaginary pattern of stars (example—Orion) Hertzsprung - Russell diagram (H-R diagram)—a graph of stars showing surface temperature on ...
... Apparent brightness—the brightness of a star as seen from Earth Absolute brightness—a star’s brightness as if it were a standard distance from Earth Constellation—an imaginary pattern of stars (example—Orion) Hertzsprung - Russell diagram (H-R diagram)—a graph of stars showing surface temperature on ...
The Stars - Department of Physics and Astronomy
... Sun’s Life Cycle on H-R Diagram H-R Diagram with annotations for Stellar Stages Temperature (log) ...
... Sun’s Life Cycle on H-R Diagram H-R Diagram with annotations for Stellar Stages Temperature (log) ...
Phys133 Sample MidTerm #2 Covers Chs.10
... 4) What happens when a star exhausts its core hydrogen supply? A) It contracts, becoming hotter and brighter. B) Its core contracts, but its outer layers expand and the star becomes bigger but cooler and therefore remains at the same brightness. C) It expands, becoming bigger but dimmer. D) It contr ...
... 4) What happens when a star exhausts its core hydrogen supply? A) It contracts, becoming hotter and brighter. B) Its core contracts, but its outer layers expand and the star becomes bigger but cooler and therefore remains at the same brightness. C) It expands, becoming bigger but dimmer. D) It contr ...
Stars: Their Life and Afterlife
... As the clumps and cores begin to contract into stars, the most massive ones will rapidly progress to the main sequence and begin burning as hot stars of types O and B. This can happen in as little as 104 – 105 years for the most massive stars (t 10 MŸ), but takes 10 million years or longer for solar ...
... As the clumps and cores begin to contract into stars, the most massive ones will rapidly progress to the main sequence and begin burning as hot stars of types O and B. This can happen in as little as 104 – 105 years for the most massive stars (t 10 MŸ), but takes 10 million years or longer for solar ...
Ch 19 Directed Reading
... 8. What type of star is the leftover center of an old star? a. main sequence ...
... 8. What type of star is the leftover center of an old star? a. main sequence ...
ph507lecnote06
... parallax accuracy to 0.001” within a few years. Before 1990, fewer than 10,000 stellar parallaxes had been measured (and only 500 known well), but there are about 1012 stars in our Galaxy. Space observations made by the European Space Agency with the Hipparcos mission (1989-1993) accurately determin ...
... parallax accuracy to 0.001” within a few years. Before 1990, fewer than 10,000 stellar parallaxes had been measured (and only 500 known well), but there are about 1012 stars in our Galaxy. Space observations made by the European Space Agency with the Hipparcos mission (1989-1993) accurately determin ...
Ch. 17 (RGs & WDs)
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... This work is protected by United States copyright laws and is provided solely for the use of instructors in teaching their courses and assessing student learning. Dissemination or sale of any part of this work (including on the World Wide Web) will destroy the integrity of the work and is not permit ...
AST 301 Introduction to Astronomy - University of Texas Astronomy
... The flux of a star depends on how much light it emits and on how far we are from that star. We’ve defined flux so it doesn’t depend on what telescope we use, but it does depend on where the telescope is. ...
... The flux of a star depends on how much light it emits and on how far we are from that star. We’ve defined flux so it doesn’t depend on what telescope we use, but it does depend on where the telescope is. ...
Introduction to the HR Diagram
... luminosities outputs 10 times more energy than the sun. An alternative way of measuring energy output is with the units called Absolute Magnitude. We will not use those units in this course – only solar luminosities. Inspecting the graph shows that main sequence stars have a very large range in lu ...
... luminosities outputs 10 times more energy than the sun. An alternative way of measuring energy output is with the units called Absolute Magnitude. We will not use those units in this course – only solar luminosities. Inspecting the graph shows that main sequence stars have a very large range in lu ...
Auriga (constellation)
Auriga is one of the 48 constellations listed by the 2nd-century astronomer Ptolemy and remains one of the 88 modern constellations. Located north of the celestial equator, its name is the Latin word for ""charioteer"", associating it with various mythological charioteers, including Erichthonius and Myrtilus. Auriga is most prominent during winter evenings in the Northern Hemisphere, along with the five other constellations that have stars in the Winter Hexagon asterism. Because of its northern declination, Auriga is only visible in its entirety as far as 34° south; for observers farther south it lies partially or fully below the horizon. A large constellation, with an area of 657 square degrees, it is half the size of the largest constellation, Hydra.Its brightest star, Capella, is an unusual multiple star system among the brightest stars in the night sky. Beta Aurigae is an interesting variable star in the constellation; Epsilon Aurigae, a nearby eclipsing binary with an unusually long period, has been studied intensively. Because of its position near the winter Milky Way, Auriga has many bright open clusters in its borders, including M36, M37, and M38, popular targets for amateur astronomers. In addition, it has one prominent nebula, the Flaming Star Nebula, associated with the variable star AE Aurigae.In Chinese mythology, Auriga's stars were incorporated into several constellations, including the celestial emperors' chariots, made up of the modern constellation's brightest stars. Auriga is home to the radiant for the Aurigids, Zeta Aurigids, Delta Aurigids, and the hypothesized Iota Aurigids.