![Study Guide](http://s1.studyres.com/store/data/010548590_1-a45b1efdb13f71dd77fb566b2fc55c0d-300x300.png)
Study Guide
... Black hole - spinning causes the core to collapse allowing nothing to escape Neutron star - the left over core of a supernova that begins to rotate very fast Explain the Doppler shift in terms of color and direction. If an object is moving away from us, the color spectra will shift toward red Red ...
... Black hole - spinning causes the core to collapse allowing nothing to escape Neutron star - the left over core of a supernova that begins to rotate very fast Explain the Doppler shift in terms of color and direction. If an object is moving away from us, the color spectra will shift toward red Red ...
Photometry
... • When measuring a star you most likely would be measuring it against a “background” that produces some photons (ie., the night sky isn’t completely dark due to scattered light from cities, etc) • By measuring a region around the star, this level can be subtracted from the star to get the brightness ...
... • When measuring a star you most likely would be measuring it against a “background” that produces some photons (ie., the night sky isn’t completely dark due to scattered light from cities, etc) • By measuring a region around the star, this level can be subtracted from the star to get the brightness ...
Characteristics of Stars
... • Astronomers use a unit called the light year to measure distances between the stars • Light travels at a speed of 300,000 km/s • Light year- distance that light travels in one year =9.5 trillion km • Light year=unit of distance ...
... • Astronomers use a unit called the light year to measure distances between the stars • Light travels at a speed of 300,000 km/s • Light year- distance that light travels in one year =9.5 trillion km • Light year=unit of distance ...
Summer 2001 Day 07: Intro to Solar System
... circle (i.e. within the confines of this building), the NEAREST next star would be in CORTLAND! (3) A parsec is real big! (4) Miles – km analogy Practice Problem #1 & #2 2) Proper Motion and Radial Velocity A) Stars are not truly fixed in the sky, but move in two ways B) Towards or away from the Sun ...
... circle (i.e. within the confines of this building), the NEAREST next star would be in CORTLAND! (3) A parsec is real big! (4) Miles – km analogy Practice Problem #1 & #2 2) Proper Motion and Radial Velocity A) Stars are not truly fixed in the sky, but move in two ways B) Towards or away from the Sun ...
1. Neutron stars 2. Black holes
... undergo Photodisintegration, undoing the fusion process of the previous 10 million years. End up with electrons, protons, neutrons, and photons in core. Core compresses, stops and rebounds with a vengeance! During this rebound, a shock wave sweeps through the star blasting all the overlying layers, ...
... undergo Photodisintegration, undoing the fusion process of the previous 10 million years. End up with electrons, protons, neutrons, and photons in core. Core compresses, stops and rebounds with a vengeance! During this rebound, a shock wave sweeps through the star blasting all the overlying layers, ...
How Is a Star`s Color Related to Its Temperature?
... On a clear night you have surely noticed that some stars are brighter than others. But stars also have different colors. Rigel is blue, and Betelgeuse is red. Capella and our sun are yellow. In this activity you will make your own Hertzsprung-Russell diagram. You will see how star brightness, color, ...
... On a clear night you have surely noticed that some stars are brighter than others. But stars also have different colors. Rigel is blue, and Betelgeuse is red. Capella and our sun are yellow. In this activity you will make your own Hertzsprung-Russell diagram. You will see how star brightness, color, ...
Lightest exoplanet found in nearest star system to Earth
... It is also the lightest exoplanet ever discovered around a star like the Sun. The planet was detected using the HARPS instrument on the 3.6-meter telescope at ESO's La Silla Observatory in Chile. Alpha Centauri is one of the brightest stars in the southern skies and is the nearest stellar system to ...
... It is also the lightest exoplanet ever discovered around a star like the Sun. The planet was detected using the HARPS instrument on the 3.6-meter telescope at ESO's La Silla Observatory in Chile. Alpha Centauri is one of the brightest stars in the southern skies and is the nearest stellar system to ...
The Mass-Luminosity Relationship and Stellar Lifetimes
... This doesn’t seem right… • Our intuition would seem to say that since big stars have a lot more fuel to consume, they should last a lot longer than smaller stars. • It doesn’t work this way, however. If the luminosity of a star increases with the 4th power of the mass, that means that the star is p ...
... This doesn’t seem right… • Our intuition would seem to say that since big stars have a lot more fuel to consume, they should last a lot longer than smaller stars. • It doesn’t work this way, however. If the luminosity of a star increases with the 4th power of the mass, that means that the star is p ...
Ay123 Fall 2011 STELLAR STRUCTURE AND EVOLUTION Problem Set 1
... 5. (5 pts) Prove that if the orbital plane of binaries are oriented randomly with respect to the plane of the sky, that the average value is sin3 i is 0.59. How has this result been useful in calibrating the relationship between stellar mass and luminosity ? 6. (10 pts) An eclipsing-binary system ha ...
... 5. (5 pts) Prove that if the orbital plane of binaries are oriented randomly with respect to the plane of the sky, that the average value is sin3 i is 0.59. How has this result been useful in calibrating the relationship between stellar mass and luminosity ? 6. (10 pts) An eclipsing-binary system ha ...
Stellar Magnitude, Distance, and Motion
... seconds of arc per year o Proper motion is not large. The star with the largest proper motion is called Barnard's Star. It moves 10.3 seconds of arc per year. o Since the moon subtends about 1/2 of a degree (which is 1/2 x 60 x 60 = 1800 seconds of arc) on the celestial sphere, it takes Barnard' ...
... seconds of arc per year o Proper motion is not large. The star with the largest proper motion is called Barnard's Star. It moves 10.3 seconds of arc per year. o Since the moon subtends about 1/2 of a degree (which is 1/2 x 60 x 60 = 1800 seconds of arc) on the celestial sphere, it takes Barnard' ...
Birth and Life of a Star
... them very dense. The heavier the white dwarf is, then the smaller its size will be. A star like our Sun will become a white dwarf when it has run out of fuel. Near the end of its life, it will go through a red giant stage, and then lose most of its gas, until what is left settles down and becomes a ...
... them very dense. The heavier the white dwarf is, then the smaller its size will be. A star like our Sun will become a white dwarf when it has run out of fuel. Near the end of its life, it will go through a red giant stage, and then lose most of its gas, until what is left settles down and becomes a ...
Birth and Life of a Star
... them very dense. The heavier the white dwarf is, then the smaller its size will be. A star like our Sun will become a white dwarf when it has run out of fuel. Near the end of its life, it will go through a red giant stage, and then lose most of its gas, until what is left settles down and becomes a ...
... them very dense. The heavier the white dwarf is, then the smaller its size will be. A star like our Sun will become a white dwarf when it has run out of fuel. Near the end of its life, it will go through a red giant stage, and then lose most of its gas, until what is left settles down and becomes a ...
solutions
... how much light comes from each square meter of its surface. The atmospheric pressure depends on the star’s surface gravity and therefore, roughly, on its size telling whether it is a giant, dwarf, or something in between. The size and surface brightness in turn yield the star’s luminosity (its total ...
... how much light comes from each square meter of its surface. The atmospheric pressure depends on the star’s surface gravity and therefore, roughly, on its size telling whether it is a giant, dwarf, or something in between. The size and surface brightness in turn yield the star’s luminosity (its total ...
HR DIAGRAM ACTIVITY
... You can check your HR diagram at: http://deskarati.com/wp-content/uploads/2012/03/HertzsprungRussell-Diagram.jpg 1. Draw a circle around all the red giants on your graph and label this enclosed area Red Giants. 2. Draw a circle around all the white dwarfs and label this enclosed area White Dwarfs. 3 ...
... You can check your HR diagram at: http://deskarati.com/wp-content/uploads/2012/03/HertzsprungRussell-Diagram.jpg 1. Draw a circle around all the red giants on your graph and label this enclosed area Red Giants. 2. Draw a circle around all the white dwarfs and label this enclosed area White Dwarfs. 3 ...
Measuring the Stars pages 813-820
... that the axis of the Earth is pointing to for about the next 2,000 years. The Earth has a wobble, and the axis will only point at Polaris for a few hundred years, then, another star will be north. The ancient Egyptians could not have used Polaris as a compass. ...
... that the axis of the Earth is pointing to for about the next 2,000 years. The Earth has a wobble, and the axis will only point at Polaris for a few hundred years, then, another star will be north. The ancient Egyptians could not have used Polaris as a compass. ...
Brichler-powerpoint
... relationship between the surface temperature and the absolute brightness of stars. ...
... relationship between the surface temperature and the absolute brightness of stars. ...
Page 1 Astronomy 110 Homework #08 Assigned: 03/13/2007 Due
... references (i.e. Google or Wikipedia), etc in any responses to homework, quiz, or exam questions. Ideas should be expressed in your own words. Not only does this protect you from illegal acts of plagiarism and/or accusations of cheating, but it also aids your future studying by having ideas expresse ...
... references (i.e. Google or Wikipedia), etc in any responses to homework, quiz, or exam questions. Ideas should be expressed in your own words. Not only does this protect you from illegal acts of plagiarism and/or accusations of cheating, but it also aids your future studying by having ideas expresse ...
stars and constellations
... is pointing to for about the next 2,000 years. The Earth has a “wobble”, and the axis will only point at Polaris for a few hundred years, then, another star will be “North”. The ancient Egyptians could not have used Polaris as a ...
... is pointing to for about the next 2,000 years. The Earth has a “wobble”, and the axis will only point at Polaris for a few hundred years, then, another star will be “North”. The ancient Egyptians could not have used Polaris as a ...
File
... original size and it cools down. The outer layers of the star begin to expand far out into space. As the outer layers expand, they get farther away from the core and cool down. What color are cool stars? Yep, red! That is why, in this stage of a star’s life, it is called a “red giant”. ...
... original size and it cools down. The outer layers of the star begin to expand far out into space. As the outer layers expand, they get farther away from the core and cool down. What color are cool stars? Yep, red! That is why, in this stage of a star’s life, it is called a “red giant”. ...
HR DIAGRAM[1] Star Human Comparison Are all stars the same
... Star Human Comparison Are all stars the same? Not in the least! Some stars are just beginning to form in nebulae, others are enjoying middle age along the main sequence, and some have begun to die. The life cycle of a star can be compared to the life cycle of humans. Before you were born, your body ...
... Star Human Comparison Are all stars the same? Not in the least! Some stars are just beginning to form in nebulae, others are enjoying middle age along the main sequence, and some have begun to die. The life cycle of a star can be compared to the life cycle of humans. Before you were born, your body ...
Supernovae, Neutron Stars, Black Holes
... Triggering the Formation of the Solar System --- New data from meteorites indicates that formation of the Solar System was triggered by a supernova. Written by G. Jeffrey Taylor Hawai'i Institute of Geophysics and Planetology One of the most amazing discoveries in space science is the unambiguous ev ...
... Triggering the Formation of the Solar System --- New data from meteorites indicates that formation of the Solar System was triggered by a supernova. Written by G. Jeffrey Taylor Hawai'i Institute of Geophysics and Planetology One of the most amazing discoveries in space science is the unambiguous ev ...
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.