Stars - TeacherWeb
... Life span of a star depends on its size. – Very large, massive stars burn their fuel much faster than smaller stars – Their main sequence may last only a few hundred thousand years – Smaller stars will live on for billions of years because they burn their fuel much more slowly ...
... Life span of a star depends on its size. – Very large, massive stars burn their fuel much faster than smaller stars – Their main sequence may last only a few hundred thousand years – Smaller stars will live on for billions of years because they burn their fuel much more slowly ...
1. If a star`s temperature is doubled but radius is kept constant, by
... 8. Which of the above two objects looks redder and why? 8a. The cooler object looks redder because it emits more of its enery at those shorter wavelengths. 9. What is the main physical quantity that explains spectral type? 9a. Temperature. 10. True or False: the largest telescope on Earth can take a ...
... 8. Which of the above two objects looks redder and why? 8a. The cooler object looks redder because it emits more of its enery at those shorter wavelengths. 9. What is the main physical quantity that explains spectral type? 9a. Temperature. 10. True or False: the largest telescope on Earth can take a ...
Lecture 10 February 13
... Each electron added must find its own quantum state by having its own velocity. But what happens when the next electron has to go faster than light? ...
... Each electron added must find its own quantum state by having its own velocity. But what happens when the next electron has to go faster than light? ...
First Exam - University of Iowa Astrophysics
... 26. You look up in the night sky and see the planet Jupiter, the planet Mars, and the Moon very close together. You know that they are located in or close to one of the following. Which is it? (a) the ecliptic ∗ (b) the celestial equator (c) the zenith (d) the north celestial pole (e) the constellat ...
... 26. You look up in the night sky and see the planet Jupiter, the planet Mars, and the Moon very close together. You know that they are located in or close to one of the following. Which is it? (a) the ecliptic ∗ (b) the celestial equator (c) the zenith (d) the north celestial pole (e) the constellat ...
Summer Triangle (Winter in the south hemisphere) Lyra
... Phaeton's best friend Cygnus came to the riverbank every day and cried for his friend. To ease his pain, the gods placed Cygnus in the sky, where he took the form of a swan. The Chinese also have a myth associated with this constellation. This myth is referred to as the "magpie bridge" 鵲橋. Notable S ...
... Phaeton's best friend Cygnus came to the riverbank every day and cried for his friend. To ease his pain, the gods placed Cygnus in the sky, where he took the form of a swan. The Chinese also have a myth associated with this constellation. This myth is referred to as the "magpie bridge" 鵲橋. Notable S ...
PowerPoint
... Some Reasons for the great abundance of Low-Mass stars… 1) Obviously requires less material to make (many!) Low-Mass Stars, than High-Mass ones; 2) Even though High-Mass stars have more “fuel” (Hydrogen)… ...
... Some Reasons for the great abundance of Low-Mass stars… 1) Obviously requires less material to make (many!) Low-Mass Stars, than High-Mass ones; 2) Even though High-Mass stars have more “fuel” (Hydrogen)… ...
Properties of stars
... off 1000 times more light than Rigel!! SO..If Spica is giving off more light, why would it appear dimmer in the sky here at Earth? ...
... off 1000 times more light than Rigel!! SO..If Spica is giving off more light, why would it appear dimmer in the sky here at Earth? ...
Summary: Stellar Distances
... Interstellar dust makes stars look redder over long distances Temperatures can also be inferred from the appearance of a star’s spectrum - the pattern of spectral lines. This spectral typing is not affected by interstellar dust. Surface temperatures of stars almost all lie between 40,000°K for the “ ...
... Interstellar dust makes stars look redder over long distances Temperatures can also be inferred from the appearance of a star’s spectrum - the pattern of spectral lines. This spectral typing is not affected by interstellar dust. Surface temperatures of stars almost all lie between 40,000°K for the “ ...
The H-R Diagram
... The Herzsprung Russel Diagram (HRD) is a systematic way of arranging stellar data. It plots the Absolute Magnitude (MV) or Luminosity (L/L¤) versus the Spectral Type, Surface Temperature or Color. The brightest stars are at the top and the hottest stars at the left. The radius increases diagonally t ...
... The Herzsprung Russel Diagram (HRD) is a systematic way of arranging stellar data. It plots the Absolute Magnitude (MV) or Luminosity (L/L¤) versus the Spectral Type, Surface Temperature or Color. The brightest stars are at the top and the hottest stars at the left. The radius increases diagonally t ...
Introduction to Astronomy
... • Smaller numbers imply brighter stars. • “Apparent magnitude” is a measure of apparent brightness. Antares has mag. 1; Polaris has mag. 2; naked eye limit is about 6. Sirius has mag. –1.5. • “Absolute magnitude” is a measure of true brightness. It’s what the apparent magnitude would be if the star ...
... • Smaller numbers imply brighter stars. • “Apparent magnitude” is a measure of apparent brightness. Antares has mag. 1; Polaris has mag. 2; naked eye limit is about 6. Sirius has mag. –1.5. • “Absolute magnitude” is a measure of true brightness. It’s what the apparent magnitude would be if the star ...
Answers to Coursebook questions – Chapter E3
... From the HR diagram a main sequence star at this temperature has a luminosity that is about 100 times larger than the Sun’s, i.e. 3.9 10 28 W . ...
... From the HR diagram a main sequence star at this temperature has a luminosity that is about 100 times larger than the Sun’s, i.e. 3.9 10 28 W . ...
CONSTELLATION DELPHINUS, THE DOLPHIN
... 2) The Greek poet Arion of Lesbos (7th century BC), was a court musician at the palace of Periander, ruler of Corinth. Arion was sailing back to Greece after a concert tour of southern Italy when the sailors who were also on the ship started plotting to kill him and take the money he had earned. Sur ...
... 2) The Greek poet Arion of Lesbos (7th century BC), was a court musician at the palace of Periander, ruler of Corinth. Arion was sailing back to Greece after a concert tour of southern Italy when the sailors who were also on the ship started plotting to kill him and take the money he had earned. Sur ...
Stars Power Point
... • Low numbers are brightest, high are dimmest • Sun = -26.7 • Sirius = -1.45 (Brightest Star) ...
... • Low numbers are brightest, high are dimmest • Sun = -26.7 • Sirius = -1.45 (Brightest Star) ...
The Stars
... and Polaris is +2. So Sirius is the brighter star as we see it. • This is called apparent magnitude. ...
... and Polaris is +2. So Sirius is the brighter star as we see it. • This is called apparent magnitude. ...
Stellar Physics Lecture 1
... The H-R Diagram – Other regions to note are stars of high luminosity but low temperature (indicating they are large – hence the term red giant) and stars of high temperature but low luminosity (indicating small diameters, hence white dwarf ) – As we shall see, the H-R diagram is extremely useful in ...
... The H-R Diagram – Other regions to note are stars of high luminosity but low temperature (indicating they are large – hence the term red giant) and stars of high temperature but low luminosity (indicating small diameters, hence white dwarf ) – As we shall see, the H-R diagram is extremely useful in ...
Nebula - NICADD
... • A cool (10 K) nebula can be compressed by shock waves. – Shock waves from new stars and exploding stars. ...
... • A cool (10 K) nebula can be compressed by shock waves. – Shock waves from new stars and exploding stars. ...
chapter-30-pp
... star would have at a distance of 32.6 lightyears from Earth---in other words, if all stars were the same distance from Earth this is how they would look. So, the brighter a star actually is, the lower it’s number of absolute magnitude. ...
... star would have at a distance of 32.6 lightyears from Earth---in other words, if all stars were the same distance from Earth this is how they would look. So, the brighter a star actually is, the lower it’s number of absolute magnitude. ...
Homework #2
... or less luminous than the sun? (Ignore bolometric corrections.) 3) a) Given below is the approximate period-luminosity relation for Type I Cepheid Variables. If a Type I Cepheid variable star is observed (in another galaxy) with a period of 30 days and if that Cepheid has an apparent magnitude m = 2 ...
... or less luminous than the sun? (Ignore bolometric corrections.) 3) a) Given below is the approximate period-luminosity relation for Type I Cepheid Variables. If a Type I Cepheid variable star is observed (in another galaxy) with a period of 30 days and if that Cepheid has an apparent magnitude m = 2 ...
Astronomy 360 - indstate.edu
... This is the preferred coordinate system (Equatorial Coordinates) to pinpoint objects on the celestial sphere. Unlike the horizontal coordinate system, equatorial coordinates are independent of the observer's location and the time of the observation. This means that only one set of coordinates is re ...
... This is the preferred coordinate system (Equatorial Coordinates) to pinpoint objects on the celestial sphere. Unlike the horizontal coordinate system, equatorial coordinates are independent of the observer's location and the time of the observation. This means that only one set of coordinates is re ...
The coolest White Dwarf— older than the age of the universe?
... Problem 1—the orbit One of the problems in this binary system is its low eccentricity. It has a near circular orbit. A supernova explosion happening nearby would certainly give an impulse to the orbiting star disrupting or ejecting it completely or at least adding energy to ...
... Problem 1—the orbit One of the problems in this binary system is its low eccentricity. It has a near circular orbit. A supernova explosion happening nearby would certainly give an impulse to the orbiting star disrupting or ejecting it completely or at least adding energy to ...
Death of Low Mass Stars 8 Solar Masses or less
... it further. Called Electron Degeneracy • The black dwarf will continue to exist at temps close to absolute zero forever…. ...
... it further. Called Electron Degeneracy • The black dwarf will continue to exist at temps close to absolute zero forever…. ...
Lesson 2 Power Notes Outline
... Energy is transferred from the sun’s core to the photosphere and escapes into space as visible light, other forms of radiation, heat, and wind. ...
... Energy is transferred from the sun’s core to the photosphere and escapes into space as visible light, other forms of radiation, heat, and wind. ...
What is a Star
... and Carbon to be produced. The star then expand greatly, Red giants have diameter's about 100 times that of the Sun. Red SuperGiant. This is a star that has diameters up to 1.000 times that of the Sun and luminosities often 1.000.000 times greater than the Sun. The core of a red supergiant can reach ...
... and Carbon to be produced. The star then expand greatly, Red giants have diameter's about 100 times that of the Sun. Red SuperGiant. This is a star that has diameters up to 1.000 times that of the Sun and luminosities often 1.000.000 times greater than the Sun. The core of a red supergiant can reach ...
WebQuest-The-Life-Cycle-of-Stars-1
... 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 ...
Homework 5 (stellar properties)
... 6. (3 pts.) What two observations/measurements would you make to classify a star according to its luminosity (i.e., luminosity class, e.g., Ia, Ib, II, III, IV, or V)? (Hint: Look at the HR diagram.) Which equation relates these two quantities to the size (radius) of a star (after all, the luminosit ...
... 6. (3 pts.) What two observations/measurements would you make to classify a star according to its luminosity (i.e., luminosity class, e.g., Ia, Ib, II, III, IV, or V)? (Hint: Look at the HR diagram.) Which equation relates these two quantities to the size (radius) of a star (after all, the luminosit ...
Canis Minor
Canis Minor /ˌkeɪnɨs ˈmaɪnər/ is a small constellation in the northern celestial hemisphere. In the second century, it was included as an asterism, or pattern, of two stars in Ptolemy's 48 constellations, and it is counted among the 88 modern constellations. Its name is Latin for ""lesser dog"", in contrast to Canis Major, the ""greater dog""; both figures are commonly represented as following the constellation of Orion the hunter.Canis Minor contains only two stars brighter than the fourth magnitude, Procyon (Alpha Canis Minoris), with a magnitude of 0.34, and Gomeisa (Beta Canis Minoris), with a magnitude of 2.9. The constellation's dimmer stars were noted by Johann Bayer, who named eight stars including Alpha and Beta, and John Flamsteed, who numbered fourteen. Procyon is the seventh-brightest star in the night sky, as well as one of the closest. A yellow-white main sequence star, it has a white dwarf companion. Gomeisa is a blue-white main sequence star. Luyten's Star is a ninth-magnitude red dwarf and the Solar System's next closest stellar neighbour in the constellation after Procyon. The fourth-magnitude HD 66141, which has evolved into an orange giant towards the end of its life cycle, was discovered to have a planet in 2012. There are two faint deep sky objects within the constellation's borders. The 11 Canis-Minorids are a meteor shower that can be seen in early December.