Astronomy 242: Review Questions #1 Distributed: February 10
... criteria used classify galaxies. How do key properties like ISM makeup and star formation change along the Hubble sequence? 14. Two years ago, an undergraduate class at University College London discovered Supernova 2014J in the nearby spiral galaxy M82 (Fig. 4). This type of supernova results from ...
... criteria used classify galaxies. How do key properties like ISM makeup and star formation change along the Hubble sequence? 14. Two years ago, an undergraduate class at University College London discovered Supernova 2014J in the nearby spiral galaxy M82 (Fig. 4). This type of supernova results from ...
Death of Stars
... High turn-off point shows there are that there are not many high mass stars left so this high mass stars present, so this cluster is cluster is older - likely to be a globular cluster younger and probably an open cluster Present information by plotting Hertzsprung-Russell diagrams for: nearby or bri ...
... High turn-off point shows there are that there are not many high mass stars left so this high mass stars present, so this cluster is cluster is older - likely to be a globular cluster younger and probably an open cluster Present information by plotting Hertzsprung-Russell diagrams for: nearby or bri ...
Star Types
... For example, if the mass of a star is doubled, its luminosity increases by a factor 23.5 ~ 11. Thus, stars like Sirius that are about twice as massive as the Sun are about 11 times as luminous. The more massive a Main Sequence star is, the hotter (bluer), and more luminous. The Main Sequence is a ma ...
... For example, if the mass of a star is doubled, its luminosity increases by a factor 23.5 ~ 11. Thus, stars like Sirius that are about twice as massive as the Sun are about 11 times as luminous. The more massive a Main Sequence star is, the hotter (bluer), and more luminous. The Main Sequence is a ma ...
IB_Op_F_04 - Effectsmeister
... early 1900's. It is sometimes called a color - magnitude diagram. Why is this ( or why is this not) an appropriate name for a plot of magnitude versus spectral class? Our star, the Sun, is a G2 spectral class star with an absolute magnitude of 4.8 . How does it compare to the locations of the near s ...
... early 1900's. It is sometimes called a color - magnitude diagram. Why is this ( or why is this not) an appropriate name for a plot of magnitude versus spectral class? Our star, the Sun, is a G2 spectral class star with an absolute magnitude of 4.8 . How does it compare to the locations of the near s ...
Directed Reading A
... b. As stars get older, they lose some of their material. c. Stars last forever. d. New stars form from the material of old stars. 2. During a star’s life cycle, hydrogen changes to helium in a process called ______________________. 3. When a star dies, either gradually or in a big explosion, much of ...
... b. As stars get older, they lose some of their material. c. Stars last forever. d. New stars form from the material of old stars. 2. During a star’s life cycle, hydrogen changes to helium in a process called ______________________. 3. When a star dies, either gradually or in a big explosion, much of ...
d 2
... • “Understanding” in the scientific sense means coming up with a model that describes how they “work”: – Collecting data (Identify the stars) – Analyzing data (Classify the stars) – Building a theory (Explain the classes and their differences) – Making predictions – Testing predictions by more obser ...
... • “Understanding” in the scientific sense means coming up with a model that describes how they “work”: – Collecting data (Identify the stars) – Analyzing data (Classify the stars) – Building a theory (Explain the classes and their differences) – Making predictions – Testing predictions by more obser ...
Properties of Stars
... back to them and answer them…worth lots of points! 5. The stars located in the lower right portion of your chart are cool and dim. What are the characteristics of a star in the upper left portion of the diagram? 6. What are the characteristics of a star located in the upper right portion of the diag ...
... back to them and answer them…worth lots of points! 5. The stars located in the lower right portion of your chart are cool and dim. What are the characteristics of a star in the upper left portion of the diagram? 6. What are the characteristics of a star located in the upper right portion of the diag ...
Astronomical terms and constants
... Known stars have luminosity in the range 10−5 − 106 L⊙ . Mbol = 4.8 − 2.5 log (L/L⊙ ) = absolute bolometric magnitude of a star with a luminosity L . “Bolometric” means integrated over the entire stellar spectral energy distribution. Mbol,⊙ = +4.74. MV = Mbol − BC = absolute visual magnitude of a st ...
... Known stars have luminosity in the range 10−5 − 106 L⊙ . Mbol = 4.8 − 2.5 log (L/L⊙ ) = absolute bolometric magnitude of a star with a luminosity L . “Bolometric” means integrated over the entire stellar spectral energy distribution. Mbol,⊙ = +4.74. MV = Mbol − BC = absolute visual magnitude of a st ...
PowerPoint - Star Life Cycle
... The life cycle of stars depends on their mass. Small and medium stars become black dwarves once they die. Larger stars become novae and die as: neutron stars ...
... The life cycle of stars depends on their mass. Small and medium stars become black dwarves once they die. Larger stars become novae and die as: neutron stars ...
Properties of Stars - Mr. Carter`s Earth
... The Hertzsprung-Russell diagram is actually a graph that illustrates the relationship that exists between the average surface temperature of stars and their absolute magnitude, which is how bright they would appear to be if they were all the same distance away. Rather than speak of the brightness of ...
... The Hertzsprung-Russell diagram is actually a graph that illustrates the relationship that exists between the average surface temperature of stars and their absolute magnitude, which is how bright they would appear to be if they were all the same distance away. Rather than speak of the brightness of ...
Lecture 31 - 2 The Death of Stars: Stellar Recycling Phase 3 -
... Once all of the Hydrogen has been converted to Helium in the star’s core, thermonuclear reactions stop and for the moment there is no internal energy output that can counteract the always present inward pull of the star’s gravity. The pure Helium core now behaves separately from the surrounding laye ...
... Once all of the Hydrogen has been converted to Helium in the star’s core, thermonuclear reactions stop and for the moment there is no internal energy output that can counteract the always present inward pull of the star’s gravity. The pure Helium core now behaves separately from the surrounding laye ...
Stars in our Galaxy
... • Most stars on the H-R diagram fit into a diagonal band. This band is called the main sequence. It contains hot, blue, bright stars in the upper left and cool, red, dim stars in the lower right. • 90% of all stars are main sequence stars but there are a few that don’t fall into this “line” what ar ...
... • Most stars on the H-R diagram fit into a diagonal band. This band is called the main sequence. It contains hot, blue, bright stars in the upper left and cool, red, dim stars in the lower right. • 90% of all stars are main sequence stars but there are a few that don’t fall into this “line” what ar ...
UCSD Students` Presentation on Star Formation
... than 100), that spans few tens of parsecs . • Associations survive for only few tens of millions of years as oppose to open clusters which last for millions/billions of years. • It is believed that the main difference between associations and open clusters is the way the stars were formed: how many ...
... than 100), that spans few tens of parsecs . • Associations survive for only few tens of millions of years as oppose to open clusters which last for millions/billions of years. • It is believed that the main difference between associations and open clusters is the way the stars were formed: how many ...
Star Life Cycle
... A Red Giant Star is a main sequence star that is not longer in equilibrium. There is a ...
... A Red Giant Star is a main sequence star that is not longer in equilibrium. There is a ...
PPT file
... supergiants Before long, they collapse in on themselves causing a massive explosion called a supernova This is important as it spreads heavy elements out through space. ...
... supergiants Before long, they collapse in on themselves causing a massive explosion called a supernova This is important as it spreads heavy elements out through space. ...
Constellations Reading
... and the fully illustrated object or figure that represents the constellation. For example, consider the Northern Hemisphere’s winter constellation Orion the Hunter. The star pattern on which it is based — four bright stars at the corners of a trapezoid and three stars in a row near the center — does ...
... and the fully illustrated object or figure that represents the constellation. For example, consider the Northern Hemisphere’s winter constellation Orion the Hunter. The star pattern on which it is based — four bright stars at the corners of a trapezoid and three stars in a row near the center — does ...
Astronomy Toolkit
... a sphere, with the star at the centre and radius equal to the distance of the star from Earth, D. ...
... a sphere, with the star at the centre and radius equal to the distance of the star from Earth, D. ...
Stars Chapter 21
... • Light Year- Astronomers use light years to measure the distances between stars –A light year is the distance that light travels in one year • 9,460,730,472,580.8 km • 5,878,630,000,000 miles ...
... • Light Year- Astronomers use light years to measure the distances between stars –A light year is the distance that light travels in one year • 9,460,730,472,580.8 km • 5,878,630,000,000 miles ...
Stars and Universe Test Review - Garnet Valley School District
... 19. _________________________ the brightness of a star as seen from Earth 20. _________________________ a developing star not yet hot enough to engage in nuclear fusion 21. _________________________ uses a curved surface to reflect radio waves from space 22. _________________________ a graph that pl ...
... 19. _________________________ the brightness of a star as seen from Earth 20. _________________________ a developing star not yet hot enough to engage in nuclear fusion 21. _________________________ uses a curved surface to reflect radio waves from space 22. _________________________ a graph that pl ...
Stargazing Rules 01162013
... Moon is shaped like a "C", it bulges to the left. 18. Even though most of the objects we observe in the night sky appear not to move in relation to each other, in reality they are all moving at great speed relative to us and to each other. They appear not to be moving because of their great distanc ...
... Moon is shaped like a "C", it bulges to the left. 18. Even though most of the objects we observe in the night sky appear not to move in relation to each other, in reality they are all moving at great speed relative to us and to each other. They appear not to be moving because of their great distanc ...
A Star is Born worksheet and key
... 4. If a star is blue, what does that reveal about its temperature? It is extremely hot 5. How is the brightness of stars measured? By their magnitude 6. What is the lifespan of red dwarfs? Trillions of years 7. What is the lifespan of stars similar to the Sun? 10 billion years 8. How is a red giant/ ...
... 4. If a star is blue, what does that reveal about its temperature? It is extremely hot 5. How is the brightness of stars measured? By their magnitude 6. What is the lifespan of red dwarfs? Trillions of years 7. What is the lifespan of stars similar to the Sun? 10 billion years 8. How is a red giant/ ...
Distant Stars Lesson Plan
... Select the Ch Cyg item out of the returned list. Review the highlights about the star: What a symbiotic star system is How fast the system’s jet streams are moving. Point out that there is a wealth of additional information not included in the ‘How far away is it’ video. ...
... Select the Ch Cyg item out of the returned list. Review the highlights about the star: What a symbiotic star system is How fast the system’s jet streams are moving. Point out that there is a wealth of additional information not included in the ‘How far away is it’ video. ...
Chapter 12
... stars. The preceding chapter told us how stars form, and the next chapter tells us how stars die. This chapter is the heart of the story—how stars live. As always, we accept nothing at face value. We expect theory to be supported by evidence. We expect carefully constructed models to help us underst ...
... stars. The preceding chapter told us how stars form, and the next chapter tells us how stars die. This chapter is the heart of the story—how stars live. As always, we accept nothing at face value. We expect theory to be supported by evidence. We expect carefully constructed models to help us underst ...
Lecture 11 - Stars and Atomic Spectra
... spectral lines from stars can be used to determine the composition, or the relative number of atoms of each elements, of the stars ...
... spectral lines from stars can be used to determine the composition, or the relative number of atoms of each elements, of the stars ...
Star catalogue
A star catalogue, or star catalog, is an astronomical catalogue that lists stars. In astronomy, many stars are referred to simply by catalogue numbers. There are a great many different star catalogues which have been produced for different purposes over the years, and this article covers only some of the more frequently quoted ones. Star catalogues were compiled by many different ancient peoples, including the Babylonians, Greeks, Chinese, Persians, and Arabs. Most modern catalogues are available in electronic format and can be freely downloaded from NASA's Astronomical Data Center.Completeness and accuracy is described by the weakest apparent magnitude V (largest number) and the accuracy of the positions.