Calculating_Main_Sequence_Lifetimes_StudentGuide
... At the beginning of the twentieth century two astronomers, the Danish E. Hertzsprung and the American H. N. Russell, established a correlation between two important stellar parameters: brightness and color. Since ancient times, the brightness of a star is indicated by "magnitudes": 1, 2 and so on, w ...
... At the beginning of the twentieth century two astronomers, the Danish E. Hertzsprung and the American H. N. Russell, established a correlation between two important stellar parameters: brightness and color. Since ancient times, the brightness of a star is indicated by "magnitudes": 1, 2 and so on, w ...
Stellar Evolution
... Giant Stars • Core decreases in size as all (or most) H is consumed • He fusion is occurring – producing more energy • Diameter increases x10 • Surface temp decreases as star expands ...
... Giant Stars • Core decreases in size as all (or most) H is consumed • He fusion is occurring – producing more energy • Diameter increases x10 • Surface temp decreases as star expands ...
new_qwk11
... A. When a star finishes burning all the hydrogen in its core, it ceases to be a main sequence star B. The “helium flash” (ignition of the helium core) takes place at the tip of the red giant branch C. A planetary nebula is formed when a star loses part of its outer envelope in a stellar wind and thi ...
... A. When a star finishes burning all the hydrogen in its core, it ceases to be a main sequence star B. The “helium flash” (ignition of the helium core) takes place at the tip of the red giant branch C. A planetary nebula is formed when a star loses part of its outer envelope in a stellar wind and thi ...
Night Sky Checklist April–May–June Unaided Eye Astronomy
... The following information may help you understand why these objects are on the Night Sky Checklists. Constellations and asterisms (Astronomers recognize 88 official constellations, but asterisms are unofficial and made from parts of one or more constellation. All are imaginary dot-to-dot drawings in ...
... The following information may help you understand why these objects are on the Night Sky Checklists. Constellations and asterisms (Astronomers recognize 88 official constellations, but asterisms are unofficial and made from parts of one or more constellation. All are imaginary dot-to-dot drawings in ...
File
... 11. What famous stars are often confused as constellations and what are they really? Big dipper and Little dipper – they are actually asterisms - prominent patterns or groups of stars, typically having a popular name but smaller than a constellation 12. Explain precession and what it means in the fu ...
... 11. What famous stars are often confused as constellations and what are they really? Big dipper and Little dipper – they are actually asterisms - prominent patterns or groups of stars, typically having a popular name but smaller than a constellation 12. Explain precession and what it means in the fu ...
Apparent Magnitude
... Ch 28 Apparent Magnitudes In 125 B.C., a famous astronomer of that time, named Hipparchus, was making a star map of the “celestial sphere”. Hipparchus not only wanted to locate each star’s position on his map, but also to indicate the brightness of each star. To do this Hipparchus invented the conce ...
... Ch 28 Apparent Magnitudes In 125 B.C., a famous astronomer of that time, named Hipparchus, was making a star map of the “celestial sphere”. Hipparchus not only wanted to locate each star’s position on his map, but also to indicate the brightness of each star. To do this Hipparchus invented the conce ...
mass per nucleon
... Star Clusters are useful laboratories for studying stars: All the stars in the cluster are at about the same distance from us All the stars in the cluster formed at about the same time (so they are about the same age) the H-R diagram of a cluster represents stars at all stages of their evolution ...
... Star Clusters are useful laboratories for studying stars: All the stars in the cluster are at about the same distance from us All the stars in the cluster formed at about the same time (so they are about the same age) the H-R diagram of a cluster represents stars at all stages of their evolution ...
Astro 1 & 100 Levine Homework Stars Name:____________________________
... You may want to do the lecture-tutorial on pg 33, Apparent and Absolute Magnitude of Stars, prior to doing this portion of the homework, if you need a refresher on m and M. Ranking questions are 2 points each. Consider the following table of stars: ...
... You may want to do the lecture-tutorial on pg 33, Apparent and Absolute Magnitude of Stars, prior to doing this portion of the homework, if you need a refresher on m and M. Ranking questions are 2 points each. Consider the following table of stars: ...
The Life Cycle of Stars
... against their colour (hence effective temperature). Independently in 1913 the American astronomer Henry Norris Russell used spectral class against absolute magnitude. Their resultant plots showed that the relationship between temperature and luminosity of a star was not random but instead appeared t ...
... against their colour (hence effective temperature). Independently in 1913 the American astronomer Henry Norris Russell used spectral class against absolute magnitude. Their resultant plots showed that the relationship between temperature and luminosity of a star was not random but instead appeared t ...
Planets and the Sun How Do We Size Up?
... • In order to determine size, we need a point of reference • A jet flying in the sky appears to be small due to distance, on the ground, it is very big • How does the Earth compare in size to the rest of the solar system? ...
... • In order to determine size, we need a point of reference • A jet flying in the sky appears to be small due to distance, on the ground, it is very big • How does the Earth compare in size to the rest of the solar system? ...
The Life Cycle of a star
... • A supernova can light up the sky for weeks. • The temperature in one can reach 1,000,000,000 °C. • The supernova then either becomes a neutron star or a black hole. ...
... • A supernova can light up the sky for weeks. • The temperature in one can reach 1,000,000,000 °C. • The supernova then either becomes a neutron star or a black hole. ...
File
... How Do Stars Form? • Formation begins with condensation of a large cloud of cold gas, ice, and dust called a nebula. • The nebula contracts, breaks into fragments, and increases in temperature. • When the center of the cloud reaches 2 million degrees F (1 million K), it becomes a protostar. • When ...
... How Do Stars Form? • Formation begins with condensation of a large cloud of cold gas, ice, and dust called a nebula. • The nebula contracts, breaks into fragments, and increases in temperature. • When the center of the cloud reaches 2 million degrees F (1 million K), it becomes a protostar. • When ...
ASTRONOMY 313
... 6. When the Sun has swollen to full red-giant size (R 0.5 A.U. = 107.5 R), its luminosity will be about 2000 times greater than it is now (i.e. L/L = 2000). Assume that the size of the Earth’s orbit remains unchanged. a. Calculate the Sun’s angular diameter at that time as seen from the Earth. ...
... 6. When the Sun has swollen to full red-giant size (R 0.5 A.U. = 107.5 R), its luminosity will be about 2000 times greater than it is now (i.e. L/L = 2000). Assume that the size of the Earth’s orbit remains unchanged. a. Calculate the Sun’s angular diameter at that time as seen from the Earth. ...
SOLUTIONS ASTROPHYSICS – OPTION D 2015-17
... The big bang signifies the beginning of time and space. At the big bang the universe was a point and so the big bang happened everywhere in the universe. The question is meaningless within the big bang model since by definition time started with the big bang. It is as meaningless as to ask for a pla ...
... The big bang signifies the beginning of time and space. At the big bang the universe was a point and so the big bang happened everywhere in the universe. The question is meaningless within the big bang model since by definition time started with the big bang. It is as meaningless as to ask for a pla ...
The Life Cycle of Stars
... It is red because it is cooler than it was in the main sequence star stage and it is a giant because the outer shell has expanded outward. In the core of the red giant, helium fuses into carbon. All stars evolve the same way up to the red giant phase. The amount of mass a star has determines which l ...
... It is red because it is cooler than it was in the main sequence star stage and it is a giant because the outer shell has expanded outward. In the core of the red giant, helium fuses into carbon. All stars evolve the same way up to the red giant phase. The amount of mass a star has determines which l ...
Life Cycle of a Star
... sun will enter the ______________ _____________ phase, which means it loses its outer layers. The star’s mass is lost until it collapses into a _____________ dwarf, which will lose energy and become a ______________ dwarf. ...
... sun will enter the ______________ _____________ phase, which means it loses its outer layers. The star’s mass is lost until it collapses into a _____________ dwarf, which will lose energy and become a ______________ dwarf. ...
Stellar Evolution
... to increase = Glows • Fusion begins at VERY high temps. (Some of the extra gas and dust may form planets) ...
... to increase = Glows • Fusion begins at VERY high temps. (Some of the extra gas and dust may form planets) ...
G030485-00 - DCC
... • Hydrogen and then Helium fuse togetherproducing energy (light and heat) and forming heavier elements ...
... • Hydrogen and then Helium fuse togetherproducing energy (light and heat) and forming heavier elements ...
Ursa Minor
Ursa Minor (Latin: ""Smaller She-Bear"", contrasting with Ursa Major), also known as the Little Bear, is a constellation in the northern sky. Like the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, hence the name Little Dipper. It was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and remains one of the 88 modern constellations. Ursa Minor has traditionally been important for navigation, particularly by mariners, due to Polaris being the North Star.Polaris, the brightest star in the constellation, is a yellow-white supergiant and the brightest Cepheid variable star in the night sky, ranging from apparent magnitude 1.97 to 2.00. Beta Ursae Minoris, also known as Kochab, is an aging star that has swollen and cooled to become an orange giant with an apparent magnitude of 2.08, only slightly fainter than Polaris. Kochab and magnitude 3 Gamma Ursae Minoris have been called the ""guardians of the pole star"". Planets have been detected orbiting four of the stars, including Kochab. The constellation also contains an isolated neutron star—Calvera—and H1504+65, the hottest white dwarf yet discovered with a surface temperature of 200,000 K.