ASTR3007/4007/6007, Tutorial 4: Deuterium Burning in Protostars
... begin. Before they can begin to burn hydrogen, however, they first burn deuterium, which is present in small amounts in interstellar gas (roughly 1 D per 50,000 H), and ignites at a lower temperature. The net reaction that the D undergoes is ...
... begin. Before they can begin to burn hydrogen, however, they first burn deuterium, which is present in small amounts in interstellar gas (roughly 1 D per 50,000 H), and ignites at a lower temperature. The net reaction that the D undergoes is ...
Document
... The left over H is pushed out into a shell ring around the He core. The core collapses & heats up. The increasing temp will cause the H shell to fuse forming He that will join the core ...
... The left over H is pushed out into a shell ring around the He core. The core collapses & heats up. The increasing temp will cause the H shell to fuse forming He that will join the core ...
Lecture 13, PPT version
... The more massive is a star, the hotter and denser is the star in its core. The hotter and denser it is in a star’s core, the FASTER the conversion of hydrogen to helium happens. High-mass (> 8 Msun) stars are “gas guzzlers” Low-mass (< 2 Msun) are “economy cars” ...
... The more massive is a star, the hotter and denser is the star in its core. The hotter and denser it is in a star’s core, the FASTER the conversion of hydrogen to helium happens. High-mass (> 8 Msun) stars are “gas guzzlers” Low-mass (< 2 Msun) are “economy cars” ...
Quiz 1 Review, Astronomy 1144 - astronomy.ohio
... 1. 1st Law - All the planets are on elliptical orbits, with the Sun at one of the foci. 2. 2nd Law - In their orbits around the Sun, every planet sweeps out equal area in equal time. Equivalently, planets move more slowly when further away from the Sun. 3. 3rd Law - The square of the period, P , of ...
... 1. 1st Law - All the planets are on elliptical orbits, with the Sun at one of the foci. 2. 2nd Law - In their orbits around the Sun, every planet sweeps out equal area in equal time. Equivalently, planets move more slowly when further away from the Sun. 3. 3rd Law - The square of the period, P , of ...
Chapter 6 Stars
... brightness of stars are related. They plotted the surface temperatures of stars on the x-axis and their absolute brightness of the y-axis. The points formed a pattern. They graph they made is still used by astronomers today. It is called the Hertzsprung-Russell diagram, or H-R diagram. Astronomers u ...
... brightness of stars are related. They plotted the surface temperatures of stars on the x-axis and their absolute brightness of the y-axis. The points formed a pattern. They graph they made is still used by astronomers today. It is called the Hertzsprung-Russell diagram, or H-R diagram. Astronomers u ...
Observing the Night Sky - Constellations
... winter into the spring. It is identifiable because of the three bright stars in a row, considered to be the belt of the hunter. To the north and a little east of Orion's right shoulder, is the bright star Betelguese, which is distinctly red in color. Below the belt and to the west is another very br ...
... winter into the spring. It is identifiable because of the three bright stars in a row, considered to be the belt of the hunter. To the north and a little east of Orion's right shoulder, is the bright star Betelguese, which is distinctly red in color. Below the belt and to the west is another very br ...
Celestial Sphere Lab
... ideas they proposed have since proven to be incorrect. Some of the concepts they developed are still useful today though. One of the more useful ideas proposed by the ancient Greeks is the idea of a celestial sphere. We now know that the Earth’s rotation causes the stars to appear to move around us ...
... ideas they proposed have since proven to be incorrect. Some of the concepts they developed are still useful today though. One of the more useful ideas proposed by the ancient Greeks is the idea of a celestial sphere. We now know that the Earth’s rotation causes the stars to appear to move around us ...
Unit 1 Cutouts
... 4(B) research and describe the contributions of scientists to our changing understanding of astronomy, including Ptolemy, Copernicus, Tycho Brahe, Kepler, Galileo, Neawton, Einstein, and Hubble, and the contribution of women astronaomers, including Maria Mitchell and Henrietta Swan Leavitt; ...
... 4(B) research and describe the contributions of scientists to our changing understanding of astronomy, including Ptolemy, Copernicus, Tycho Brahe, Kepler, Galileo, Neawton, Einstein, and Hubble, and the contribution of women astronaomers, including Maria Mitchell and Henrietta Swan Leavitt; ...
MSci Astrophysics 210PHY412 - Queen's University Belfast
... The differences are interpreted due to age – open clusters lie in the disk of the Milky Way and have large range of ages. The Globulars are all ancient, with the oldest tracing the earliest stages of the formation of Milky Way (~ 12 109 yrs) ...
... The differences are interpreted due to age – open clusters lie in the disk of the Milky Way and have large range of ages. The Globulars are all ancient, with the oldest tracing the earliest stages of the formation of Milky Way (~ 12 109 yrs) ...
The Sky - HiSPARC
... almost 4 minutes per day. Try to find out why. In the module ‘Periodical data’ you can find more information about the two different time systems. ...
... almost 4 minutes per day. Try to find out why. In the module ‘Periodical data’ you can find more information about the two different time systems. ...
What is a white dwarf?
... • Quantum mechanics says that electrons in the same place cannot be in the same state • Adding mass to a white dwarf increases its gravity, forcing electrons into a smaller space • In order to avoid being in the same state in the same place some of the electrons need to move faster. That increases t ...
... • Quantum mechanics says that electrons in the same place cannot be in the same state • Adding mass to a white dwarf increases its gravity, forcing electrons into a smaller space • In order to avoid being in the same state in the same place some of the electrons need to move faster. That increases t ...
Measuring the Properties of Stars - Sierra College Astronomy Home
... The sizes of a few very large stars have been measured directly by interferometry. Knowing the temperature of a star gives its energy emitted per square meter. Knowing the total energy emitted (from the absolute magnitude) one can then calculate the surface area of the star. From that the di ...
... The sizes of a few very large stars have been measured directly by interferometry. Knowing the temperature of a star gives its energy emitted per square meter. Knowing the total energy emitted (from the absolute magnitude) one can then calculate the surface area of the star. From that the di ...
black holes activity
... 2.When is the Chromosphere and Corona visible? -Chromosphere- not visible unless a ___________________ is occurring, sight of solar storms -which layer is hotter, why? Corona - spectral lines are dramatically different due to ____________________, temperatures dramatically increases above the chromo ...
... 2.When is the Chromosphere and Corona visible? -Chromosphere- not visible unless a ___________________ is occurring, sight of solar storms -which layer is hotter, why? Corona - spectral lines are dramatically different due to ____________________, temperatures dramatically increases above the chromo ...
The Life Cycle of Stars
... the shape of the band in the H–R diagram in Figure 4. The hotter these stars are, the more luminous they are. Astronomers have determined that hotter, more luminous main sequence stars are more massive, while cooler, less luminous stars are less massive. Main sequence stars fuse hydrogen to produce ...
... the shape of the band in the H–R diagram in Figure 4. The hotter these stars are, the more luminous they are. Astronomers have determined that hotter, more luminous main sequence stars are more massive, while cooler, less luminous stars are less massive. Main sequence stars fuse hydrogen to produce ...
Introduction to Celestial Spheres (Professor Powerpoint)
... Looking toward the south you’ll see stars rise in the south east, go to the highest point and set in the southwest, a shorter arc across the sky. ...
... Looking toward the south you’ll see stars rise in the south east, go to the highest point and set in the southwest, a shorter arc across the sky. ...
“Astronomy Picture of the Day” Leads to a Research Breakthrough
... tion, the cosmological measurements that depend on supernova observations can be improved. There are two main possible progenitor subclasses, double degenerates and single degenerates. Double degenerates consist of two white dwarfs in a tight binary orbit, while single degenerates consist of a whi ...
... tion, the cosmological measurements that depend on supernova observations can be improved. There are two main possible progenitor subclasses, double degenerates and single degenerates. Double degenerates consist of two white dwarfs in a tight binary orbit, while single degenerates consist of a whi ...
Hubble Telescope Pictures
... • Recently, astronauts voted on the top photographs taken by Hubble, in its 16-year journey so far. ...
... • Recently, astronauts voted on the top photographs taken by Hubble, in its 16-year journey so far. ...
Mon Jul 29, 2013 SUN IN LEO? NO, CANCER!
... saw roughly the same number of stars throughout. Other astronomers suggested that interstellar dust clouds kept us from seeing the great wealth of stars that lay at the galaxy's heart. And there were a lot more star clusters off in the direction of the constellation Sagittarius, which seemed to mark ...
... saw roughly the same number of stars throughout. Other astronomers suggested that interstellar dust clouds kept us from seeing the great wealth of stars that lay at the galaxy's heart. And there were a lot more star clusters off in the direction of the constellation Sagittarius, which seemed to mark ...
D2 Stellar characteristics and stellar evolution
... Cepheid variables are stars with regular variation in luminosity (rapid brightening, gradual dimming) which is caused by periodic expansion and contraction of outer surface (brighter as it expands). This is to do with the balance between the nuclear and gravitational forces within the star. In most ...
... Cepheid variables are stars with regular variation in luminosity (rapid brightening, gradual dimming) which is caused by periodic expansion and contraction of outer surface (brighter as it expands). This is to do with the balance between the nuclear and gravitational forces within the star. In most ...
Mise en page 1
... dial on the front of the watch. The focus of attention however is on the back: a planisphere of some 500 stars with lines joining them into constellations rotates once a sidereal day around the polar axis. ...
... dial on the front of the watch. The focus of attention however is on the back: a planisphere of some 500 stars with lines joining them into constellations rotates once a sidereal day around the polar axis. ...
Corvus (constellation)
Corvus is a small constellation in the Southern Celestial Hemisphere. Its name comes from the Latin word ""raven"" or ""crow"". It includes only 11 stars with brighter than 4.02 magnitudes. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The four brightest stars, Gamma, Delta, Epsilon, and Beta Corvi from a distinctive quadrilateral in the night sky. The young star Eta Corvi has been found to have two debris disks.