Instrumentation for Cosmology
... Suppose the age of the galaxy is 10 billion years. Its inner regions rotate once in 200 million years… Therefore, we’d expect about 50 turns. The galaxy would look like a clock spring. ...
... Suppose the age of the galaxy is 10 billion years. Its inner regions rotate once in 200 million years… Therefore, we’d expect about 50 turns. The galaxy would look like a clock spring. ...
notes
... Wide Field and Planetary Camera 2 (WFPC2) for ten consecutive days between December 18 and 28, 1995. 1,500 galaxies at various stages of evolution. Most of the galaxies are so faint (nearly 30th magnitude or about four-billion times fainter than can be seen by the human eye) they have never before b ...
... Wide Field and Planetary Camera 2 (WFPC2) for ten consecutive days between December 18 and 28, 1995. 1,500 galaxies at various stages of evolution. Most of the galaxies are so faint (nearly 30th magnitude or about four-billion times fainter than can be seen by the human eye) they have never before b ...
Lecture17
... Some stars are cool and thus red, but as bright as the blue main sequence stars. How can this be? They emit less light per square meter than a blue main sequence star, but, they are much, much bigger (more square meters)! ...
... Some stars are cool and thus red, but as bright as the blue main sequence stars. How can this be? They emit less light per square meter than a blue main sequence star, but, they are much, much bigger (more square meters)! ...
Slides from Lecture04
... extending it to much fainter objects (that are visible through telescopes but were not bright enough to be seen by Greek astronomers). • The Sun can also be put on this “magnitude” system. ...
... extending it to much fainter objects (that are visible through telescopes but were not bright enough to be seen by Greek astronomers). • The Sun can also be put on this “magnitude” system. ...
February 2012
... "retrograde loop" in the constellation of Leo the Lion. The word "planets" literally means "wanderers". In our view of the sky, planets appear to move or "wander" smoothly from one constellation to the next along the sequence of the Zodiac. However, as the Earth moves around the Sun, our view of pla ...
... "retrograde loop" in the constellation of Leo the Lion. The word "planets" literally means "wanderers". In our view of the sky, planets appear to move or "wander" smoothly from one constellation to the next along the sequence of the Zodiac. However, as the Earth moves around the Sun, our view of pla ...
Astronomy Webquest Part 1: Life of Stars: Go to http://www.odec.ca
... In the Table of contents on the top-left hand corner, click on STARS and answer these questions. ...
... In the Table of contents on the top-left hand corner, click on STARS and answer these questions. ...
Topics for Today`s Class Luminosity Equation The Heart of
... – Luminosity (or absolute magnitude) versus temperature (or spectral type) ...
... – Luminosity (or absolute magnitude) versus temperature (or spectral type) ...
Lecture 2+3 - University of Texas Astronomy Home Page
... 1. The Co-op has 49 new textbooks as of Friday for this class “The Cosmic Perspective, 3rd edition, Media Update” 2. What is the difference between “The Cosmic Perspective, 3rd edition” and “The Cosmic Perspective, 3rd edition, Media Update” ? The book contents are the same, but the media update ver ...
... 1. The Co-op has 49 new textbooks as of Friday for this class “The Cosmic Perspective, 3rd edition, Media Update” 2. What is the difference between “The Cosmic Perspective, 3rd edition” and “The Cosmic Perspective, 3rd edition, Media Update” ? The book contents are the same, but the media update ver ...
ASTRONOMY
... 19. How could you observe the California Nebula? 20. To what constellation do Castor and Pollux belong? 21. Where would you place Lynx in relationship to Gemini’s position? 22. What unique feature is found in Camelopardalis 23. What two prominent constellations are found in the southern skies? 24. ...
... 19. How could you observe the California Nebula? 20. To what constellation do Castor and Pollux belong? 21. Where would you place Lynx in relationship to Gemini’s position? 22. What unique feature is found in Camelopardalis 23. What two prominent constellations are found in the southern skies? 24. ...
Theoretical Problem 3
... 1. A classical estimate of the temperature at the center of the stars. Assume that the gas that forms the star is pure ionized hydrogen (electrons and protons in equal amounts), and that it behaves like an ideal gas. From the classical point of view, to fuse two protons, they need to get as close a ...
... 1. A classical estimate of the temperature at the center of the stars. Assume that the gas that forms the star is pure ionized hydrogen (electrons and protons in equal amounts), and that it behaves like an ideal gas. From the classical point of view, to fuse two protons, they need to get as close a ...
The Life Cycle of Stars Stars are a fascinating part of our universe
... As stars “age,” the outer layers of gas are pushed out into space. They grow like an expanding, glowing ball. This can make the star very luminous (bright), but the expanding shell cools and the temperature of the star decreases. These expanding stars enter “old age” and leave the main sequence. Sma ...
... As stars “age,” the outer layers of gas are pushed out into space. They grow like an expanding, glowing ball. This can make the star very luminous (bright), but the expanding shell cools and the temperature of the star decreases. These expanding stars enter “old age” and leave the main sequence. Sma ...
ppt
... The physics of stars A star begins simply as a roughly spherical ball of (mostly) hydrogen gas, responding only to gravity and it’s own pressure. To understand how this simple system behaves, however, requires an understanding of: ...
... The physics of stars A star begins simply as a roughly spherical ball of (mostly) hydrogen gas, responding only to gravity and it’s own pressure. To understand how this simple system behaves, however, requires an understanding of: ...
ASTR-1020: Astronomy II Course Lecture Notes - Faculty
... spectra of L dwarfs show strong absorption bands of H2 O and carbon monoxide (CO), the NIR spectrum of T dwarfs are dominated by absorption bands from methane (CH4 ). In addition, the metal hydride bands seen at optical wavelengths in L dwarfs are weak or absent in T dwarfs. These objects range in t ...
... spectra of L dwarfs show strong absorption bands of H2 O and carbon monoxide (CO), the NIR spectrum of T dwarfs are dominated by absorption bands from methane (CH4 ). In addition, the metal hydride bands seen at optical wavelengths in L dwarfs are weak or absent in T dwarfs. These objects range in t ...
PS #1 Solutions - Stars and Stellar Explosions 1. Opacity sources
... The density of the interior of the sun is significantly larger than that of water, for example, the density is ∼ 150 g/cm3 near the center of the sun. Why, then, do we treat stellar interiors as an ideal gas? The important physics here is as follows: in a gas, interparticle forces are typically unim ...
... The density of the interior of the sun is significantly larger than that of water, for example, the density is ∼ 150 g/cm3 near the center of the sun. Why, then, do we treat stellar interiors as an ideal gas? The important physics here is as follows: in a gas, interparticle forces are typically unim ...
Brightness vs. Distance
... • Outside measuring the sun or the stars: Many possible conditions --clouds, fog, water vapor, air pollution, smoke. All absorb or scatter light which decreases the amount that comes through. • Also, sunlight and starlight reflect off the “top” of the atmosphere and never reach the Earth. For the su ...
... • Outside measuring the sun or the stars: Many possible conditions --clouds, fog, water vapor, air pollution, smoke. All absorb or scatter light which decreases the amount that comes through. • Also, sunlight and starlight reflect off the “top” of the atmosphere and never reach the Earth. For the su ...
Mon May 27, 2013 THE VENERABLE BEDE FEAST DAY On May
... little before my time. What was noteworthy about the eclipse is that this celestial event brought two opposing armies to a standstill! As the historian Herodotus tells us: “Just as the battle was growing warm, day was suddenly changed into night. When the Lydians and the Medes observed the change, t ...
... little before my time. What was noteworthy about the eclipse is that this celestial event brought two opposing armies to a standstill! As the historian Herodotus tells us: “Just as the battle was growing warm, day was suddenly changed into night. When the Lydians and the Medes observed the change, t ...
Physics@Brock - Brock University
... (b) at either the North Pole or the South Pole. (c) [No statement can be made.] 18. On Vernal equinox the Sun is (a) above celestial equator. (b) below celestial equator. (c) on celestial equator. 19. As seen from Ontario in May the Sun (a) rises north of east and sets south of west. (b) rises south ...
... (b) at either the North Pole or the South Pole. (c) [No statement can be made.] 18. On Vernal equinox the Sun is (a) above celestial equator. (b) below celestial equator. (c) on celestial equator. 19. As seen from Ontario in May the Sun (a) rises north of east and sets south of west. (b) rises south ...
Warm Up
... A container holds gas molecules of mass m at a temperature T. A small probe inserted into the container measures the value of the x component of the velocity of ...
... A container holds gas molecules of mass m at a temperature T. A small probe inserted into the container measures the value of the x component of the velocity of ...
Chapter 12: Measuring the Properties of Stars
... 1. if we know any two of the following three factors, we can calculate the third: apparent brightness (or, in astronomy, apparent magnitude), luminosity, and distance 2. The intrinsic luminosity of a star is usually given as its absolute magnitude, which is defined as the apparent magnitude a star w ...
... 1. if we know any two of the following three factors, we can calculate the third: apparent brightness (or, in astronomy, apparent magnitude), luminosity, and distance 2. The intrinsic luminosity of a star is usually given as its absolute magnitude, which is defined as the apparent magnitude a star w ...
NASAexplores 9-12 Lesson: Classified Stars - Science
... you while gazing into the night sky. The absolute magnitude and luminosity are used for that. They give you the relative brightness based on all of the stars being the same distance away from the earth. On this diagram, you do not see all of the individual stars. Since there are so many stars, only ...
... you while gazing into the night sky. The absolute magnitude and luminosity are used for that. They give you the relative brightness based on all of the stars being the same distance away from the earth. On this diagram, you do not see all of the individual stars. Since there are so many stars, only ...
Lecture 15 (pdf from the powerpoint)
... as temperatures in the Sun's core, where nuclear fusion ...
... as temperatures in the Sun's core, where nuclear fusion ...
H-R Diagram
... After the supernova blast blows off the outer layers of the star, all that is left is the central core. The core now contains a mass between 1.4 and 3.0 times the sun's mass but condensed into a volume 10- to 20km across - roughly the size of a small town on Earth. The matter in a neutron star would ...
... After the supernova blast blows off the outer layers of the star, all that is left is the central core. The core now contains a mass between 1.4 and 3.0 times the sun's mass but condensed into a volume 10- to 20km across - roughly the size of a small town on Earth. The matter in a neutron star would ...
Corvus (constellation)
Corvus is a small constellation in the Southern Celestial Hemisphere. Its name comes from the Latin word ""raven"" or ""crow"". It includes only 11 stars with brighter than 4.02 magnitudes. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The four brightest stars, Gamma, Delta, Epsilon, and Beta Corvi from a distinctive quadrilateral in the night sky. The young star Eta Corvi has been found to have two debris disks.