Astronomical Ideas Fall 2012 Homework 4 Solutions 1. Two stars
... massive stars that still burn H on the main sequence is a clock, because we know that the cluster needs to be old enough so that all of the more massive stars have already burned up all of their Hydrogen and left the main sequence. ...
... massive stars that still burn H on the main sequence is a clock, because we know that the cluster needs to be old enough so that all of the more massive stars have already burned up all of their Hydrogen and left the main sequence. ...
Zairamink_Lifecycle of a Star
... What would it be like to enter a black hole? Not pleasant. First, as you approach the black hole the difference in the gravitational pull on your head compared to your feet (known as tidal forces) would rip you apart. But suppose you survived that. Once you cross the event horizon there is no turnin ...
... What would it be like to enter a black hole? Not pleasant. First, as you approach the black hole the difference in the gravitational pull on your head compared to your feet (known as tidal forces) would rip you apart. But suppose you survived that. Once you cross the event horizon there is no turnin ...
For instance, two hydrogen atoms may fuse together to form one
... For instance, two hydrogen atoms may fuse together to form one helium atom. The process by which light elements fuse into heavier ones is called nuclear fusion. Nuclear fusion releases huge amounts of energy. When the core of a clump becomes a hot, dense ball of hydrogen gas fusing into helium gas, ...
... For instance, two hydrogen atoms may fuse together to form one helium atom. The process by which light elements fuse into heavier ones is called nuclear fusion. Nuclear fusion releases huge amounts of energy. When the core of a clump becomes a hot, dense ball of hydrogen gas fusing into helium gas, ...
The Origin of Stars
... comes from gravitational contraction, not fusion 4) The collapsing gas becomes a young stellar object with an accretion disk and jets 4) When the young stellar object begins fusing hydrogen into helium it becomes a true star ...
... comes from gravitational contraction, not fusion 4) The collapsing gas becomes a young stellar object with an accretion disk and jets 4) When the young stellar object begins fusing hydrogen into helium it becomes a true star ...
SAMPLE TEST: Stars and Galaxies Multiple Choice Identify the letter
... 67. What type of star is shown in Figure 25-2? 68. What happens to a low-mass star when it depletes its hydrogen fuel? 69. Why do massive stars age faster than stars that are less massive? 70. Why does a red giant have a reddish appearance? 71. What is a galaxy? 72. What type of galaxy is composed m ...
... 67. What type of star is shown in Figure 25-2? 68. What happens to a low-mass star when it depletes its hydrogen fuel? 69. Why do massive stars age faster than stars that are less massive? 70. Why does a red giant have a reddish appearance? 71. What is a galaxy? 72. What type of galaxy is composed m ...
Stars - Lauer Science
... nuclear fusion During nuclear fusion, two or more atoms of one element combine to form one atom of a different element ...
... nuclear fusion During nuclear fusion, two or more atoms of one element combine to form one atom of a different element ...
V Example: our SUN (G2V)
... A black hole is the remnant of the collapse of neutron star from a more massive star. Black hole If the high mass star is around 25 Solar masses, the stellar remnant can compress much further than a neutron star resulting in a black hole. It's important to realize that a black hole is not a hole in ...
... A black hole is the remnant of the collapse of neutron star from a more massive star. Black hole If the high mass star is around 25 Solar masses, the stellar remnant can compress much further than a neutron star resulting in a black hole. It's important to realize that a black hole is not a hole in ...
Star signs and horoscopes
... of children have the same star sign you can make groups of three. Explain that they are going to work on a project about their star signs and explain that they can use the books about star signs in the class, and also look for information on the internet. For example, they can type the name of their ...
... of children have the same star sign you can make groups of three. Explain that they are going to work on a project about their star signs and explain that they can use the books about star signs in the class, and also look for information on the internet. For example, they can type the name of their ...
The Sun Compared to Other Stars
... The Sun Compared to Other Stars • Hertzsprung-Russell (HR) Diagram: A graph plot indicating individual stars as points, with stellar luminosity on the vertical axis & surface temperature (spectral type) on the horizontal axis • We can use spectroscopy to determine the spectral type & luminosity of a ...
... The Sun Compared to Other Stars • Hertzsprung-Russell (HR) Diagram: A graph plot indicating individual stars as points, with stellar luminosity on the vertical axis & surface temperature (spectral type) on the horizontal axis • We can use spectroscopy to determine the spectral type & luminosity of a ...
Dubhe
... All of the stars except for Dubhe and Alkaid are part of the Ursa Major Moving Group The Iroquois which is a native tribe believed that Ursa Major worked magic. ...
... All of the stars except for Dubhe and Alkaid are part of the Ursa Major Moving Group The Iroquois which is a native tribe believed that Ursa Major worked magic. ...
Objectives
... • Energy released is more than 100 times what our sun will radiate over its entire lifetime • Supernovas outshine ALL the stars in its own galaxy COMBINED!! • May even be visible on earth during daylight hours • very rare ...
... • Energy released is more than 100 times what our sun will radiate over its entire lifetime • Supernovas outshine ALL the stars in its own galaxy COMBINED!! • May even be visible on earth during daylight hours • very rare ...
Astronomy 100—Exam 2
... 16. Which of the following statements is not true for a supernova explosion A. it is the final stage of the evolution of a massive star. B. material that later formed the earth and human beings was distributed between the stars. C. the star may shine as brightly as billions of stars. D. matter is ej ...
... 16. Which of the following statements is not true for a supernova explosion A. it is the final stage of the evolution of a massive star. B. material that later formed the earth and human beings was distributed between the stars. C. the star may shine as brightly as billions of stars. D. matter is ej ...
Life Cycles of Stars
... The End Fate of Medium-Size Stars • Core reaches limits of its ability to sustain fusion • Fusion shells sputter and become unstable • Star expels outermost layers as Planetary Nebulae • Inert core left as white dwarf • Dwarf has such tiny surface area it takes billions of years to cool • Coolest ( ...
... The End Fate of Medium-Size Stars • Core reaches limits of its ability to sustain fusion • Fusion shells sputter and become unstable • Star expels outermost layers as Planetary Nebulae • Inert core left as white dwarf • Dwarf has such tiny surface area it takes billions of years to cool • Coolest ( ...
The Brightness of Stars
... because they are hot! Their color is determined by their temperature Consequently, their brightness is dependent on their temperature (among other things) ...
... because they are hot! Their color is determined by their temperature Consequently, their brightness is dependent on their temperature (among other things) ...
Chapter 5
... Circumnavigate - travel completely around something, as in circumnavigate the globe expansionism the actions and attitudes of a state or country whose goal is to expand its power and territory Indigenous someone born in a country; the first inhabitants of an area Compass – an instrument used ...
... Circumnavigate - travel completely around something, as in circumnavigate the globe expansionism the actions and attitudes of a state or country whose goal is to expand its power and territory Indigenous someone born in a country; the first inhabitants of an area Compass – an instrument used ...
The King Of The Planets
... why he is referred to be a GAS GIANT. o It has 90% hydrogen and 10% helium. ...
... why he is referred to be a GAS GIANT. o It has 90% hydrogen and 10% helium. ...
Name
... Read the passage and study the table below. Then use a separate sheet of paper to answer the questions that follow. ...
... Read the passage and study the table below. Then use a separate sheet of paper to answer the questions that follow. ...
Star of Bethlehem
In Christian tradition, the Star of Bethlehem, also called the Christmas Star, revealed the birth of Jesus to the Biblical Magi, and later led them to Bethlehem. The star appears only in the nativity story of the Gospel of Matthew, where astrologers from the east are inspired by the star to travel to Jerusalem. There they meet King Herod of Judea, and ask where the king of the Jews had been born. Herod, following a verse from the Book of Micah interpreted as a prophecy, directs them to Bethlehem, to the south of Jerusalem. The star leads them to Jesus' home in the town, where they worship him and give him gifts. The wise men are then given a divine warning not to return to Herod so they return home by a different route.Many Christians see the star as a miraculous sign to mark the birth of the Christ (or messiah). Some theologians claimed that the star fulfilled a prophecy, known as the Star Prophecy. Astronomers have made several attempts to link the star to unusual astronomical events, such as a conjunction of Jupiter and Saturn, a comet or a supernova.Many modern scholars do not consider the story to be describing a historical event but a pious fiction created by the author of the Gospel of Matthew.The subject is a favorite at planetarium shows during the Christmas season, although the Biblical account describes Jesus with a broader Greek word, which can mean either ""infant"" or ""child"" (paidon), rather than the more specific word for infant (brephos), possibly implying that some time has passed since the birth. The visit is traditionally celebrated on Epiphany (January 6) in Western Christianity.