Milky Way structure
... Galactic center, about three quarters of the distance to the Sagittarius dwarf and a quarter of the distance to the LMC. The discovery was made in data from the 2MASS-sky survey, where infrared light allows a better view through our optically opaque Galactic plane. The labeled illustration above sho ...
... Galactic center, about three quarters of the distance to the Sagittarius dwarf and a quarter of the distance to the LMC. The discovery was made in data from the 2MASS-sky survey, where infrared light allows a better view through our optically opaque Galactic plane. The labeled illustration above sho ...
Document
... – The star we call the Sun and all the celestial bodies that orbit the Sun including Earth the other eight planets all their various moons smaller bodies such as asteroids and comets ...
... – The star we call the Sun and all the celestial bodies that orbit the Sun including Earth the other eight planets all their various moons smaller bodies such as asteroids and comets ...
PH109 Exploring the Uiverse, Test #4, Spring, 1999
... 26. Which of the following is an essential part of Einstein's explanation of gravity? (a) matter causes curvature of space (b) the gravity of a moving object varies with time (c) gravitational forces exist only over a limited distance (d) anti-matter has negative gravity 27. If the Sun were replaced ...
... 26. Which of the following is an essential part of Einstein's explanation of gravity? (a) matter causes curvature of space (b) the gravity of a moving object varies with time (c) gravitational forces exist only over a limited distance (d) anti-matter has negative gravity 27. If the Sun were replaced ...
Wednesday, April 2 - Otterbein University
... intrinsically dimmer than it appears – If a star is farther than 10pc, its absolute magnitude will be a smaller number, i.e. it is intrinsically brighter than it appears ...
... intrinsically dimmer than it appears – If a star is farther than 10pc, its absolute magnitude will be a smaller number, i.e. it is intrinsically brighter than it appears ...
Parallax - The Universe Adventure
... the moon using the parallax shift viewed between two cities on Earth. The distance he calculated is surprisingly close to the accurate distance we can measure today! Later astronomers were able to estimate the distance to planets and nearby stars using parallax with the diameter of the Earth’s orbit ...
... the moon using the parallax shift viewed between two cities on Earth. The distance he calculated is surprisingly close to the accurate distance we can measure today! Later astronomers were able to estimate the distance to planets and nearby stars using parallax with the diameter of the Earth’s orbit ...
May 2013 - Otterbein
... • Normal stars undergoing a phase of instability • Cepheids are more massive and brighter than RR Lyrae • Note: all RR Lyrae have the same luminosity • Apparent brightness thus tells us the distance to them! – Recall: B L/d2 ...
... • Normal stars undergoing a phase of instability • Cepheids are more massive and brighter than RR Lyrae • Note: all RR Lyrae have the same luminosity • Apparent brightness thus tells us the distance to them! – Recall: B L/d2 ...
WK10revisedoneweek
... A universe that came from nothing in the big bang will disappear into nothing at the big crunch. Its glorious few zillion years of existence not even a memory. ...
... A universe that came from nothing in the big bang will disappear into nothing at the big crunch. Its glorious few zillion years of existence not even a memory. ...
9 - WordPress.com
... The wonders of the Universe are revealed through technological advances based on tested principles of physics. Our understanding of the cosmos draws upon models, theories and laws in our endeavour to seek explanations for the myriad of observations made by various instruments at many different wavel ...
... The wonders of the Universe are revealed through technological advances based on tested principles of physics. Our understanding of the cosmos draws upon models, theories and laws in our endeavour to seek explanations for the myriad of observations made by various instruments at many different wavel ...
Extension worksheet – Topic 6 - Cambridge Resources for the IB
... the temperature of the star (obtained form its spectrum) and the stellar type so the HR can be used to find luminosity. ...
... the temperature of the star (obtained form its spectrum) and the stellar type so the HR can be used to find luminosity. ...
Star clusters and constellations
... Star clusters are groups of stars that are ‘connected’ by a significant gravitational force ands move around tougher as the galaxy rotates. The motion of the Sun through the galaxy does not affect the appearance of a star cluster from Earth over a long period of time. Examples of star clusters are t ...
... Star clusters are groups of stars that are ‘connected’ by a significant gravitational force ands move around tougher as the galaxy rotates. The motion of the Sun through the galaxy does not affect the appearance of a star cluster from Earth over a long period of time. Examples of star clusters are t ...
Apparent Magnitude
... Why do stars in the night sky appear considerably different in brightness? The distances to stars are not all the same. ...
... Why do stars in the night sky appear considerably different in brightness? The distances to stars are not all the same. ...
Earth in space
... in all directions at the speed of light (300 million m/sec), masses of gas cooled and condensed and… ...
... in all directions at the speed of light (300 million m/sec), masses of gas cooled and condensed and… ...
Stellar Evolution
... Pulsations Estimate from sound travel time through the star: P ~ r-1/2 Cepheids all have approx. the same surface temperature. => Higher L => Larger R => Smaller r => Larger P ...
... Pulsations Estimate from sound travel time through the star: P ~ r-1/2 Cepheids all have approx. the same surface temperature. => Higher L => Larger R => Smaller r => Larger P ...
PX269 Galaxies The University of Warwick
... remnant with a semi-major axis of 0.83 arcsec and a semi-minor axis of 0.62 arcsec. The ring brightened asymmetrically over a period of 340 days. Use this information to determine the distance to the Large Magellanic Cloud (LMC). c) What is the advantage of this method over other methods for determi ...
... remnant with a semi-major axis of 0.83 arcsec and a semi-minor axis of 0.62 arcsec. The ring brightened asymmetrically over a period of 340 days. Use this information to determine the distance to the Large Magellanic Cloud (LMC). c) What is the advantage of this method over other methods for determi ...
the_universe-part-1
... energy that most astronomers think gave rise to the universe as we see it today. • occurred about 13.7 billion years ago • thought to have expanded within a second from something the size of a spec of dust to the size of our solar system Misconception Alert: Describing this theory as the “Big Bang” ...
... energy that most astronomers think gave rise to the universe as we see it today. • occurred about 13.7 billion years ago • thought to have expanded within a second from something the size of a spec of dust to the size of our solar system Misconception Alert: Describing this theory as the “Big Bang” ...
Galaxies and the Universe - Mr. Jones's Science Class
... energy that most astronomers think gave rise to the universe as we see it today. • occurred about 13.7 billion years ago • thought to have expanded within a second from something the size of a spec of dust to the size of our solar system Misconception Alert: Describing this theory as the “Big Bang” ...
... energy that most astronomers think gave rise to the universe as we see it today. • occurred about 13.7 billion years ago • thought to have expanded within a second from something the size of a spec of dust to the size of our solar system Misconception Alert: Describing this theory as the “Big Bang” ...
ASTR2050 Spring 2005 • In this class we will cover: Brief review
... total of 334 variable star names. After that, “V335...” e.g. W-Virginis, RR-Lyrae, etc... ...
... total of 334 variable star names. After that, “V335...” e.g. W-Virginis, RR-Lyrae, etc... ...
Introduction to Astronomy
... If you measure a star's apparent magnitude and know its absolute magnitude, you can find the star's distance (using the inverse square law of light brightness). If you know a star's apparent magnitude and distance, you can find the star's luminosity A star can be luminous because it is hot or it is ...
... If you measure a star's apparent magnitude and know its absolute magnitude, you can find the star's distance (using the inverse square law of light brightness). If you know a star's apparent magnitude and distance, you can find the star's luminosity A star can be luminous because it is hot or it is ...
AST121 Introduction to Astronomy
... A comparison of two EIT images almost two years apart illustrates how the level of solar activity has increased significantly. The Sun attains its expected sunspot maximum in the year 2000. These images are captured using Fe IX-X 171 Å emission showing the solar corona at a temperature of about 1.3 ...
... A comparison of two EIT images almost two years apart illustrates how the level of solar activity has increased significantly. The Sun attains its expected sunspot maximum in the year 2000. These images are captured using Fe IX-X 171 Å emission showing the solar corona at a temperature of about 1.3 ...
Parallax - High Point University
... A comparison of two EIT images almost two years apart illustrates how the level of solar activity has increased significantly. The Sun attains its expected sunspot maximum in the year 2000. These images are captured using Fe IX-X 171 Å emission showing the solar corona at a temperature of about 1.3 ...
... A comparison of two EIT images almost two years apart illustrates how the level of solar activity has increased significantly. The Sun attains its expected sunspot maximum in the year 2000. These images are captured using Fe IX-X 171 Å emission showing the solar corona at a temperature of about 1.3 ...
Lecture 6
... • How to measure the distance to stars? • Look at how they appear to move relative to each other ...
... • How to measure the distance to stars? • Look at how they appear to move relative to each other ...
homework assignment 3
... Due Monday, April 22, 2013 at 5 p.m., either electronically or on paper. 1. Most astronomy textbooks use planets orbiting the Sun to illustrate the relevance of Kepler’s third law of planetary motion. In a class on stars and galaxies, describe a more relevant example of Kepler’s third law (i.e., whe ...
... Due Monday, April 22, 2013 at 5 p.m., either electronically or on paper. 1. Most astronomy textbooks use planets orbiting the Sun to illustrate the relevance of Kepler’s third law of planetary motion. In a class on stars and galaxies, describe a more relevant example of Kepler’s third law (i.e., whe ...
Cosmic distance ladder
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A real direct distance measurement of an astronomical object is possible only for those objects that are ""close enough"" (within about a thousand parsecs) to Earth. The techniques for determining distances to more distant objects are all based on various measured correlations between methods that work at close distances and methods that work at larger distances. Several methods rely on a standard candle, which is an astronomical object that has a known luminosity.The ladder analogy arises because no one technique can measure distances at all ranges encountered in astronomy. Instead, one method can be used to measure nearby distances, a second can be used to measure nearby to intermediate distances, and so on. Each rung of the ladder provides information that can be used to determine the distances at the next higher rung.