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stars and planets
... There are around 200 billion stars in the Milky Way alone. VY Canis Majoris is the largest known star in our galaxy, if this star was in the center of our solar system it would reach the orbit of Saturn. One of the smallest known stars in the galaxy is VB 10, it is only around 20% larger than Jupite ...
... There are around 200 billion stars in the Milky Way alone. VY Canis Majoris is the largest known star in our galaxy, if this star was in the center of our solar system it would reach the orbit of Saturn. One of the smallest known stars in the galaxy is VB 10, it is only around 20% larger than Jupite ...
Stars Unit 1-2: Stars
... – The largest observed stars have diameters some 2,000 time the size of the sun! • That’s approximately 2,760,000,000km. • For the record, there are just about 11 football fields in one km. ...
... – The largest observed stars have diameters some 2,000 time the size of the sun! • That’s approximately 2,760,000,000km. • For the record, there are just about 11 football fields in one km. ...
North Star pulses brightly with constant change
... Cepheid variable stars pulsate, getting larger and brighter, and smaller and fainter, in a regular cycle. Polaris goes through its cycle in about four days. How much a star brightens and dims -- the amplitude -- varies from star to star. In Polaris' case, it's only a few percent. But in the 1980s, a ...
... Cepheid variable stars pulsate, getting larger and brighter, and smaller and fainter, in a regular cycle. Polaris goes through its cycle in about four days. How much a star brightens and dims -- the amplitude -- varies from star to star. In Polaris' case, it's only a few percent. But in the 1980s, a ...
Epsilon Aurigae Mystery and Opportunity
... The History of the Mystery • Johann Fritsch was the first to note the variability of epsilon Aurigae in early 1821, when the star was likely in the midst of a deep eclipse. • The German astronomers Argelander and Heis both began "regular" observing once every few years around 1842-1843, and the data ...
... The History of the Mystery • Johann Fritsch was the first to note the variability of epsilon Aurigae in early 1821, when the star was likely in the midst of a deep eclipse. • The German astronomers Argelander and Heis both began "regular" observing once every few years around 1842-1843, and the data ...
Planet Walk Activity
... 1) Measure the distance from the “Sun” to the #4 position of Mars, Jupiter, and Saturn. Plot and label their positions on the grid. (Each floor tile is 1 foot by 1 foot) 2) Plot and label the #2 and #6 positions of Earth on the grid, as well. 3) Draw lines from the #2 position of Earth through each ...
... 1) Measure the distance from the “Sun” to the #4 position of Mars, Jupiter, and Saturn. Plot and label their positions on the grid. (Each floor tile is 1 foot by 1 foot) 2) Plot and label the #2 and #6 positions of Earth on the grid, as well. 3) Draw lines from the #2 position of Earth through each ...
AST 207 Test 2 Answers 20 October 2010
... star A. Prof. Adams says he discovered a new type of star that is fainter than white dwarfs. Has he discovered a new type of star? Explain. The clues are very much like Walter Adams’ discovery that Sirius B is a white dwarf. However, there is a crucial missing clue. Since Sirius A and B were known t ...
... star A. Prof. Adams says he discovered a new type of star that is fainter than white dwarfs. Has he discovered a new type of star? Explain. The clues are very much like Walter Adams’ discovery that Sirius B is a white dwarf. However, there is a crucial missing clue. Since Sirius A and B were known t ...
Document
... Estimate the intensity of the radiation emitted per unit area from a star if it’s effective surface Temp is 6000K Estimate the energy emitted from a star if its peak wavelength is 600nm. Total power radiated Power output = E x surface area of star Surface area of a star = 4 R 2 Where R is the rad ...
... Estimate the intensity of the radiation emitted per unit area from a star if it’s effective surface Temp is 6000K Estimate the energy emitted from a star if its peak wavelength is 600nm. Total power radiated Power output = E x surface area of star Surface area of a star = 4 R 2 Where R is the rad ...
Evolution of Close Binary Systems
... • The scenario that leads to nova explosions can produce an even wilder phenomenon. • In the early 1900s `novae’ were sometimes observed in other galaxies and were used to help set the distances to galaxies. • But, when it became clear that even the nearest galaxies were much further away than anyon ...
... • The scenario that leads to nova explosions can produce an even wilder phenomenon. • In the early 1900s `novae’ were sometimes observed in other galaxies and were used to help set the distances to galaxies. • But, when it became clear that even the nearest galaxies were much further away than anyon ...
Unit 3 - Section 9.1 2011 Distances in Space0
... 1. The baseline is perpendicular (i.e., 90O) to a line draw from the middle of AB to point C. Thus, the triangle ABC is symmetric. If we call the drawn line r, then AC = BC = r 2. The length of AB is less than r. This means that the angle between AC and AB is small. This is the parallax of C as view ...
... 1. The baseline is perpendicular (i.e., 90O) to a line draw from the middle of AB to point C. Thus, the triangle ABC is symmetric. If we call the drawn line r, then AC = BC = r 2. The length of AB is less than r. This means that the angle between AC and AB is small. This is the parallax of C as view ...
Light and the Electromagnetic Spectrum
... Atoms and Light • The movement of electrons inside of atoms produces light and other ...
... Atoms and Light • The movement of electrons inside of atoms produces light and other ...
mass per nucleon
... The Age of the Universe Stars in the oldest clusters have ages of 10-15 billion years From the expansion rate of the universe, we can estimate the time since the Big Bang. Current values are around 13 billion years. Are there stars older than the Universe??? ...
... The Age of the Universe Stars in the oldest clusters have ages of 10-15 billion years From the expansion rate of the universe, we can estimate the time since the Big Bang. Current values are around 13 billion years. Are there stars older than the Universe??? ...
Exercise 4 (Stars and the universe) Suggested answers
... Exercise 4 (Stars and the universe) Suggested answers 1. (a) The star is nearly a blackbody, the spectrum of a star can be approximated as a blackbody radiation curve. On the curve, there is a peak which shifts to shorter wavelength when the temperature of the blackbody increases. From the position ...
... Exercise 4 (Stars and the universe) Suggested answers 1. (a) The star is nearly a blackbody, the spectrum of a star can be approximated as a blackbody radiation curve. On the curve, there is a peak which shifts to shorter wavelength when the temperature of the blackbody increases. From the position ...
Review Questions for Exam #2
... In order to figure out the mass of a star we observe binary star systems and use Kepler’s 3rd Law, (M1 + M2) P2 = 4π2*a3/G Discuss how we determine, P and a. How do we solve for individual mass (like M1) rather than (M1 + M2)? ...
... In order to figure out the mass of a star we observe binary star systems and use Kepler’s 3rd Law, (M1 + M2) P2 = 4π2*a3/G Discuss how we determine, P and a. How do we solve for individual mass (like M1) rather than (M1 + M2)? ...
Stars and their Properties
... Closest stars (besides the Sun) are hundreds of thousands of times further away than the Sun Stars are so far away so it’s safe to look at them All stars are made up of 75% hydrogen and 25% helium Parallax – Apparent movement of an object based on your own movement You cannot see parallax with the n ...
... Closest stars (besides the Sun) are hundreds of thousands of times further away than the Sun Stars are so far away so it’s safe to look at them All stars are made up of 75% hydrogen and 25% helium Parallax – Apparent movement of an object based on your own movement You cannot see parallax with the n ...
"Stars" Power Point notes
... • Apparent magnitude is the apparent brightness of a star as measured on Earth. - Apparent magnitude depends on the star’s actual brightness and distance. - The smaller the magnitude number, the brighter the star. (http://spaceweather.com/flybys ) ...
... • Apparent magnitude is the apparent brightness of a star as measured on Earth. - Apparent magnitude depends on the star’s actual brightness and distance. - The smaller the magnitude number, the brighter the star. (http://spaceweather.com/flybys ) ...
Test#4
... 18. The reason the Solar system does not have a lot of dust and gas between the planets is a) the solar wind blew the dust and gas out of the Solar system b) the planets accreted all the gas and dust c) the early Solar system was made up only of Hydrogen and Helium d) the Sun burns them up 19. All ...
... 18. The reason the Solar system does not have a lot of dust and gas between the planets is a) the solar wind blew the dust and gas out of the Solar system b) the planets accreted all the gas and dust c) the early Solar system was made up only of Hydrogen and Helium d) the Sun burns them up 19. All ...
Our Community`s Place Among the Stars
... a. Hot and bright b. Hot and dim c. Cool and dim d. Cool and bright 2a. Plot the locations of the stars from Table 1. 3. Classify each of the stars. ...
... a. Hot and bright b. Hot and dim c. Cool and dim d. Cool and bright 2a. Plot the locations of the stars from Table 1. 3. Classify each of the stars. ...
Astronomy Lecture Notes: Stellar Nomenclature I Introduction
... c. Apparent Magnitudes i. Apparent magnitude is a code for brightness ii. Established visually by Hipparcos around 140 B.C.E. iii. Now measured using solid state photometers iv. A backward scale with the brightest star represented by the lowest number v. The brightest star in the entire sky is Siriu ...
... c. Apparent Magnitudes i. Apparent magnitude is a code for brightness ii. Established visually by Hipparcos around 140 B.C.E. iii. Now measured using solid state photometers iv. A backward scale with the brightest star represented by the lowest number v. The brightest star in the entire sky is Siriu ...
The Hexalpha or Six-Pointed Star - Cumbria Freemasons | Royal Arch
... names including the hexagram, a name which is applicable to any six-line or sixsided figure. It is also represents the six-pointed or ‘Blazing Star’. Solomon is supposed to have found the hexalpha a most potent talisman. There is a story that he confined a genie in a bottle by sealing it with the he ...
... names including the hexagram, a name which is applicable to any six-line or sixsided figure. It is also represents the six-pointed or ‘Blazing Star’. Solomon is supposed to have found the hexalpha a most potent talisman. There is a story that he confined a genie in a bottle by sealing it with the he ...
Astronomy Assignment #1
... Mathematical problems may be hand written. Write out the problem, show your work in solving the problem and state your answer in a complete sentence. Failure to complete all three of these tasks will result in less than full credit awarded. The Instructor assigned topic must be typed. Text Problems: ...
... Mathematical problems may be hand written. Write out the problem, show your work in solving the problem and state your answer in a complete sentence. Failure to complete all three of these tasks will result in less than full credit awarded. The Instructor assigned topic must be typed. Text Problems: ...
DYNAMICAL STABILITY OF SPHERICAL STARS
... by the same factor: r = r0 (1 + x), where x is a very small number that may vary with time, but not in space. Mass conservation expressed with eq. (d.1b) demands that ρ = ρ0 (1 − 3x). We shall assume that the change is adiabatic, with a constant adiabatic exponent γ : ...
... by the same factor: r = r0 (1 + x), where x is a very small number that may vary with time, but not in space. Mass conservation expressed with eq. (d.1b) demands that ρ = ρ0 (1 − 3x). We shall assume that the change is adiabatic, with a constant adiabatic exponent γ : ...
The coolest White Dwarf— older than the age of the universe?
... low-to-intermediate mass stars. Low mass stars end up as Helium WDs. Solar type stars end as Carbon-Oxygen WDs. Stars on the higher end of the masses in question, as indicated in this paper, end as Oxygen-NeonMagnesium WDs. (Of course, the authors can only interpret the type by the binary companion ...
... low-to-intermediate mass stars. Low mass stars end up as Helium WDs. Solar type stars end as Carbon-Oxygen WDs. Stars on the higher end of the masses in question, as indicated in this paper, end as Oxygen-NeonMagnesium WDs. (Of course, the authors can only interpret the type by the binary companion ...
Star of Bethlehem
![](https://commons.wikimedia.org/wiki/Special:FilePath/Giotto_-_Scrovegni_-_-18-_-_Adoration_of_the_Magi.jpg?width=300)
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.