Multiple Choice, continued
... fusion is a process in which less-massive atomic nuclei combine to form more-massive nuclei. The process releases enormous amounts of energy. • The onset of nuclear fusion marks the birth of a star. Once this process begins, it can continue for billions of years. ...
... fusion is a process in which less-massive atomic nuclei combine to form more-massive nuclei. The process releases enormous amounts of energy. • The onset of nuclear fusion marks the birth of a star. Once this process begins, it can continue for billions of years. ...
File
... fusion is a process in which less-massive atomic nuclei combine to form more-massive nuclei. The process releases enormous amounts of energy. • The onset of nuclear fusion marks the birth of a star. Once this process begins, it can continue for billions of years. ...
... fusion is a process in which less-massive atomic nuclei combine to form more-massive nuclei. The process releases enormous amounts of energy. • The onset of nuclear fusion marks the birth of a star. Once this process begins, it can continue for billions of years. ...
Shining Light on the Stars: The Hertzsprung-Russell
... Back at Orion, if we draw a line through his belt moving up and to the right we find a bright orange colored star called Aldebaran, located in the constellation of Taurus the Bull. It is about five hundred times the luminosity of our Sun, with a surface temperature of about 3,900 degrees Kelvin, so ...
... Back at Orion, if we draw a line through his belt moving up and to the right we find a bright orange colored star called Aldebaran, located in the constellation of Taurus the Bull. It is about five hundred times the luminosity of our Sun, with a surface temperature of about 3,900 degrees Kelvin, so ...
Measuring the Properties of Stars (ch. 17)
... Stefan’s law (see ch.3 if you have forgotten): The rate of emission of energy of all light, at all wavelengths, by an object, by a unit area of its surface, per unit time (e.g. per second), E, is proportional to the fourth power of the surface (photospheric) temperature T4. Writing L for the luminos ...
... Stefan’s law (see ch.3 if you have forgotten): The rate of emission of energy of all light, at all wavelengths, by an object, by a unit area of its surface, per unit time (e.g. per second), E, is proportional to the fourth power of the surface (photospheric) temperature T4. Writing L for the luminos ...
Virtual HR Diagram Lab
... 8. Uncheck show luminosity classes and check show instability strip. Note that this region of the HR Diagram indicates where pulsating stars are found such as RR Lyrae stars and Cepheid variable stars. These stars vary in brightness because they are pulsating-alternately growing bigger and smaller- ...
... 8. Uncheck show luminosity classes and check show instability strip. Note that this region of the HR Diagram indicates where pulsating stars are found such as RR Lyrae stars and Cepheid variable stars. These stars vary in brightness because they are pulsating-alternately growing bigger and smaller- ...
SPECTRAL ANALYSIS OF A NEWLY DISCOVERED HgMn STAR
... Ni (0.63 dex). We failed to identify more Hg II lines in the range from 5590 to 5840 Å due to the telluric lines. Telluric lines should be reduced to obtain more a precise mercury abundance. New observations at high resolution including 3500 to 4500 Å region may also help to improve the Hg overabund ...
... Ni (0.63 dex). We failed to identify more Hg II lines in the range from 5590 to 5840 Å due to the telluric lines. Telluric lines should be reduced to obtain more a precise mercury abundance. New observations at high resolution including 3500 to 4500 Å region may also help to improve the Hg overabund ...
December
... Ori), Bellatrix (gamma Ori) and Betelgeuse (alpha Ori). Fully one-third of the 1st magnitude stars visible in the sky (seven of twenty-one) are in the Winter Circle with Sirius, Procyon, Pollux - toss in 2nd magnitude Castor - Capella, Aldebaran, and Rigel on the periphery, and Betelgeuse located of ...
... Ori), Bellatrix (gamma Ori) and Betelgeuse (alpha Ori). Fully one-third of the 1st magnitude stars visible in the sky (seven of twenty-one) are in the Winter Circle with Sirius, Procyon, Pollux - toss in 2nd magnitude Castor - Capella, Aldebaran, and Rigel on the periphery, and Betelgeuse located of ...
October 2012 - astronomy for beginners
... When astronomers standardised and agreed the internationally accepted constellations they also agreed borders for each constellation. The brighter stars within a constellations borders are given a reference using the Greek alphabet starting at α (the first letter) for the brightest the β (second let ...
... When astronomers standardised and agreed the internationally accepted constellations they also agreed borders for each constellation. The brighter stars within a constellations borders are given a reference using the Greek alphabet starting at α (the first letter) for the brightest the β (second let ...
Logarithms and Earthquake Magnitude
... If the amplitude at 100 km is less than 4.8 x 10-7 then (A / Azero) will be less than one, which yields a magnitude less than zero because the log10 of a number less than one will be negative. In practice earthquakes this small, although quite numerous, are usually too small to be recorded and locat ...
... If the amplitude at 100 km is less than 4.8 x 10-7 then (A / Azero) will be less than one, which yields a magnitude less than zero because the log10 of a number less than one will be negative. In practice earthquakes this small, although quite numerous, are usually too small to be recorded and locat ...
Stellar Evolution
... elements far beyond carbon in its core, leading to a very different fate. Its path across the H–R diagram is essentially a straight line – it stays at just about the same luminosity as it cools off. Eventually the star dies in a violent explosion called a supernova. ...
... elements far beyond carbon in its core, leading to a very different fate. Its path across the H–R diagram is essentially a straight line – it stays at just about the same luminosity as it cools off. Eventually the star dies in a violent explosion called a supernova. ...
Constellations, Looking Far Away, and Stars/Stellar Evolution
... Read aloud. The graph of how the temperatures and luminosities of stars are related is known as the Hertzsprung-Russell or H-R diagram. From this graph, we can also get an estimate of the size of a star, its radius. Astronomers worked with this graph long before they knew why stars varied in this wa ...
... Read aloud. The graph of how the temperatures and luminosities of stars are related is known as the Hertzsprung-Russell or H-R diagram. From this graph, we can also get an estimate of the size of a star, its radius. Astronomers worked with this graph long before they knew why stars varied in this wa ...
Nature of Stars 2
... Kepler’s relation does not work for objects that are not orbiting the Sun, for example, the Moon orbiting the Earth. Newton solved this problem with his law of universal gravitation, and discovered that the masses of the orbiting bodies also play a part. Newton developed a more general form of what ...
... Kepler’s relation does not work for objects that are not orbiting the Sun, for example, the Moon orbiting the Earth. Newton solved this problem with his law of universal gravitation, and discovered that the masses of the orbiting bodies also play a part. Newton developed a more general form of what ...
Stars change over their life cycles.
... Like our Sun, all stars are huge balls of glowing gas that produce or have produced energy by fusion. However, stars differ in size, brightness, and temperature. Some stars are smaller, fainter, and cooler than the Sun. Others are much bigger, brighter, and hotter. Stars look like small points of li ...
... Like our Sun, all stars are huge balls of glowing gas that produce or have produced energy by fusion. However, stars differ in size, brightness, and temperature. Some stars are smaller, fainter, and cooler than the Sun. Others are much bigger, brighter, and hotter. Stars look like small points of li ...
The Parent Stars of New Extrasolar Planet System Candidates
... system. For example, the planet 51 Peg b is a Jupiter-sized object, and yet it is so close to its parent star that it completes one orbital period every 4.2 days (Mayor & Queloz 1995). Several of the other planets have also shown similar traits. Because of this, speculation has arisen regarding how ...
... system. For example, the planet 51 Peg b is a Jupiter-sized object, and yet it is so close to its parent star that it completes one orbital period every 4.2 days (Mayor & Queloz 1995). Several of the other planets have also shown similar traits. Because of this, speculation has arisen regarding how ...
Rotation in the ZAMS: Be and Bn stars
... Figure 3a shows the apparent V=7 magnitude limited counts of dwarf Be stars relative to dwarf B stars. There is an apparent lack of dwarf Be stars cooler than spectral type B7. This could be due to genuine Be stars whose discs are minute and/or too cool for the Hα emission be detectable and/or, to f ...
... Figure 3a shows the apparent V=7 magnitude limited counts of dwarf Be stars relative to dwarf B stars. There is an apparent lack of dwarf Be stars cooler than spectral type B7. This could be due to genuine Be stars whose discs are minute and/or too cool for the Hα emission be detectable and/or, to f ...
Measuring Stars` Properties - Test 1 Study Guide
... 4.3 light years = 4 x 1013 km (1 AU = distance Earth to Sun = 8 light minutes) • Close stars use stellar parallax (heliocentric parallax or triangulation ! same meaning) • Can “easily” measure distance using parallax to a few 100 LY. Need telescope: first observed in 1838. Study close stars in det ...
... 4.3 light years = 4 x 1013 km (1 AU = distance Earth to Sun = 8 light minutes) • Close stars use stellar parallax (heliocentric parallax or triangulation ! same meaning) • Can “easily” measure distance using parallax to a few 100 LY. Need telescope: first observed in 1838. Study close stars in det ...
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.