Homework #9 - Solutions - Department of Physics and Astronomy
... in intergalactic space (beyond the halo) We would expect to see only old extreme population II stars (and possibly population III stars which are predicted to exist but have not been conclusively observed). e) in the galactic bulge Population II since there is little gas and dust for new star format ...
... in intergalactic space (beyond the halo) We would expect to see only old extreme population II stars (and possibly population III stars which are predicted to exist but have not been conclusively observed). e) in the galactic bulge Population II since there is little gas and dust for new star format ...
word document - FacStaff Home Page for CBU
... In Section C we study multiple star systems to see what additional information we can obtain when two (or more) stars orbit each other. In Section D we consider the things other than stars that are out there: interstellar atoms, dust, and nebulae. These are related to the birth and death of stars co ...
... In Section C we study multiple star systems to see what additional information we can obtain when two (or more) stars orbit each other. In Section D we consider the things other than stars that are out there: interstellar atoms, dust, and nebulae. These are related to the birth and death of stars co ...
Phobos
... imply that the Hubble constant should be correspondingly reduced and that the Universe could be 15% bigger and older. The astronomers studied two of the brightest stars in M33, the components of a binary system in which one star eclipses the other every five days. They determined the masses of the c ...
... imply that the Hubble constant should be correspondingly reduced and that the Universe could be 15% bigger and older. The astronomers studied two of the brightest stars in M33, the components of a binary system in which one star eclipses the other every five days. They determined the masses of the c ...
MULTIPLE CHOICE. Choose the one alternative that best
... 4) Which of the following statements about the sunspot cycle is not true? A) The number of solar flares peaks about every 11 years. B) The rate of nuclear fusion in the Sun peaks about every 11 years. C) With each subsequent peak in the number of sunspots, the magnetic polarity of the Sun is the rev ...
... 4) Which of the following statements about the sunspot cycle is not true? A) The number of solar flares peaks about every 11 years. B) The rate of nuclear fusion in the Sun peaks about every 11 years. C) With each subsequent peak in the number of sunspots, the magnetic polarity of the Sun is the rev ...
Parallax, Apparent Magnitude and Absolute Magnitude
... We can see this parallax shift when we compare the positions on the sky of a nearby star observed six months apart. As the Earth orbits the Sun, its line of sight towards the star changes, which makes the star’s position shift against the (more distant) background stars (see Figure 2). Because the s ...
... We can see this parallax shift when we compare the positions on the sky of a nearby star observed six months apart. As the Earth orbits the Sun, its line of sight towards the star changes, which makes the star’s position shift against the (more distant) background stars (see Figure 2). Because the s ...
Understanding Stars
... Every element has it’s own unique spectrum – Use this to identify the composition of a gas • Chromosphere or corona Extremely dense things (opaque gases, liquids or solids) the atoms are too close – Emit a continuous spectrum • photosphere Stefan-Boltzman Law A dense hot object emits light of all co ...
... Every element has it’s own unique spectrum – Use this to identify the composition of a gas • Chromosphere or corona Extremely dense things (opaque gases, liquids or solids) the atoms are too close – Emit a continuous spectrum • photosphere Stefan-Boltzman Law A dense hot object emits light of all co ...
The Life Cycle of Stars Webquest
... E = MC2 and learn how mass in the form of hydrogen atoms is converted to helium and causes a release of energy that makes stars shine. 3. You will also begin to understand the forces involved in stars that maintain this nuclear reaction and how these forces change as the star ages. 4. You will explo ...
... E = MC2 and learn how mass in the form of hydrogen atoms is converted to helium and causes a release of energy that makes stars shine. 3. You will also begin to understand the forces involved in stars that maintain this nuclear reaction and how these forces change as the star ages. 4. You will explo ...
Document
... C) It has been steadily increasing over time D) It has been steadily decreasing over time E) It is on the average steady from month to month and year to year 3. The hottest stars in the HR diagram can be found in what part of the diagram? A) Left B) Right C) Top D) Bottom E) Middle 4. Which of the f ...
... C) It has been steadily increasing over time D) It has been steadily decreasing over time E) It is on the average steady from month to month and year to year 3. The hottest stars in the HR diagram can be found in what part of the diagram? A) Left B) Right C) Top D) Bottom E) Middle 4. Which of the f ...
Pocket Planetarium * Volume 21
... Venus both in the evening, westward, right after sunset, and on the following morning, eastward, in the minutes just before sunrise. This opportunity occurs only every eight years, and to meet this observational challenge, you need an unencumbered, perfectly clear horizon. Binoculars can help you ma ...
... Venus both in the evening, westward, right after sunset, and on the following morning, eastward, in the minutes just before sunrise. This opportunity occurs only every eight years, and to meet this observational challenge, you need an unencumbered, perfectly clear horizon. Binoculars can help you ma ...
NASC 1100
... the star’s radius, making its surface hotter. In the H-R diagram, the star goes down and to the left. All low-mass stars fuse helium into carbon at nearly the same rate they have almost the same luminosity, but differ in temperature. ...
... the star’s radius, making its surface hotter. In the H-R diagram, the star goes down and to the left. All low-mass stars fuse helium into carbon at nearly the same rate they have almost the same luminosity, but differ in temperature. ...
answers2004_05_BC - Particle Physics and Particle Astrophysics
... Use space-based interferometer working in infra-red to get necessary resolution: look for ozone IR spectral features (terrestrial oxygen is biogenic). Assumes that photosynthesis is universal, and that not enough oxygen is produced abiogenically to make ozone layer ...
... Use space-based interferometer working in infra-red to get necessary resolution: look for ozone IR spectral features (terrestrial oxygen is biogenic). Assumes that photosynthesis is universal, and that not enough oxygen is produced abiogenically to make ozone layer ...
Extreme Stars
... Binary star (6 + 8 Suns) 27 year period One star is invisible! An unseen blue star hides in a disk of dust that orbits a yellow supergiant When the blue star passes in front of the yellow star, the disk blocks the light of yellow star ...
... Binary star (6 + 8 Suns) 27 year period One star is invisible! An unseen blue star hides in a disk of dust that orbits a yellow supergiant When the blue star passes in front of the yellow star, the disk blocks the light of yellow star ...
PDF version (two pages, including the full text)
... can't actually see the centre directly because of the thick dust clouds in between. Only one in a billion photons of visible light from the Galactic Centre can get through, and infrared cameras are needed to show what's there. Infrared observations of stars orbiting the centre suggest that right at ...
... can't actually see the centre directly because of the thick dust clouds in between. Only one in a billion photons of visible light from the Galactic Centre can get through, and infrared cameras are needed to show what's there. Infrared observations of stars orbiting the centre suggest that right at ...
Answer
... 1. Describe how the Luminosity of this star changes with time. Luminosity remains constant at about 1 Lsun until about 10,000 Myr when it suddenly (and briefly) increases to over 4500 Lsun. 2. Describe how the radius of this star changes with time. Radius remains constant at about 1 Rsun until about ...
... 1. Describe how the Luminosity of this star changes with time. Luminosity remains constant at about 1 Lsun until about 10,000 Myr when it suddenly (and briefly) increases to over 4500 Lsun. 2. Describe how the radius of this star changes with time. Radius remains constant at about 1 Rsun until about ...
Chapter 12 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. ...
“Reach for the Stars” Practice Exam
... b. How would the fate of this star have differed had the distances separating the two stars been significantly greater? ___________________________ ___________________________________________________________ ___________________________________________________________ ________________________________ ...
... b. How would the fate of this star have differed had the distances separating the two stars been significantly greater? ___________________________ ___________________________________________________________ ___________________________________________________________ ________________________________ ...
THE HERTZSPRUNG-RUSSELL DIAGRAM (H
... Hypothesis: If a star has a (circle one: greater / lesser) mass, then its life will be longer. Independent Variable: ___________________________ (what variable will you be changing?) Dependent Variable: ____________________________ (What variable will you be measuring?) Procedure: A. Using the “Mass ...
... Hypothesis: If a star has a (circle one: greater / lesser) mass, then its life will be longer. Independent Variable: ___________________________ (what variable will you be changing?) Dependent Variable: ____________________________ (What variable will you be measuring?) Procedure: A. Using the “Mass ...
Stellar Parallax Problems
... C. The original Gaia mission cost about a Billion dollars. This hypothetical mission might coust about the same even though it is farther away since the development costs have already been covered. Would you be willing to vote to fund such a mission as part of an international consortium? ...
... C. The original Gaia mission cost about a Billion dollars. This hypothetical mission might coust about the same even though it is farther away since the development costs have already been covered. Would you be willing to vote to fund such a mission as part of an international consortium? ...
Star Cycle Balloons - Communicating Astronomy With The Public
... with the yellow “stars”(balloons) put a small styrofoam ball inside, those with a white “star” are to put a marble or bead inside, and those with a blue “star” are to put a tablespoon of powder or confetti inside. 2. The student with the red balloon will go first, reading aloud Step 1 directions fro ...
... with the yellow “stars”(balloons) put a small styrofoam ball inside, those with a white “star” are to put a marble or bead inside, and those with a blue “star” are to put a tablespoon of powder or confetti inside. 2. The student with the red balloon will go first, reading aloud Step 1 directions fro ...
Life Cycle of Stars Activity
... with the yellow “stars”(balloons) put a small styrofoam ball inside, those with a white “star” are to put a marble or bead inside, and those with a blue “star” are to put a tablespoon of powder or confetti inside. 2. The student with the red balloon will go first, reading aloud Step 1 directions fro ...
... with the yellow “stars”(balloons) put a small styrofoam ball inside, those with a white “star” are to put a marble or bead inside, and those with a blue “star” are to put a tablespoon of powder or confetti inside. 2. The student with the red balloon will go first, reading aloud Step 1 directions fro ...
Assignment Worksheet
... 2. Bubble in the 5-digit homework code, 11111, on the form under "Identification Number" in columns A-E (lower left-hand corner of the form). Do not enter your Student ID or any other info into this area, just the 5-digit homework code. 3. Bubble in your answers under questions 1-5 in the fields pro ...
... 2. Bubble in the 5-digit homework code, 11111, on the form under "Identification Number" in columns A-E (lower left-hand corner of the form). Do not enter your Student ID or any other info into this area, just the 5-digit homework code. 3. Bubble in your answers under questions 1-5 in the fields pro ...
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.