Handout from Allaire Star Party
... One of the nebulae visible in the fall is the Eagle Nebula, M16, in the constellation Serpens. M16 is 7,000 light years away and has 3 huge “pillars” of dark dust that are silhouetted against the nebula in the background. One of the most famous Hubble images depicts these “Pillars of Creation” and s ...
... One of the nebulae visible in the fall is the Eagle Nebula, M16, in the constellation Serpens. M16 is 7,000 light years away and has 3 huge “pillars” of dark dust that are silhouetted against the nebula in the background. One of the most famous Hubble images depicts these “Pillars of Creation” and s ...
characteristics of stars
... When a star ends its life it runs out of __________ and other fuels needed to produce energy. When this happens the star _________ _________ and begins to cool. RED GIANT - a star near the end of its life, that becomes larger and redder as it runs out of its hydrogen fuel. RED SUPERGIANT - a star wi ...
... When a star ends its life it runs out of __________ and other fuels needed to produce energy. When this happens the star _________ _________ and begins to cool. RED GIANT - a star near the end of its life, that becomes larger and redder as it runs out of its hydrogen fuel. RED SUPERGIANT - a star wi ...
light years
... 8.3 minutes to reach Earth. The distance between Earth and the Sun can be expressed as 8.3 light minutes. electromagnetic radiation: energy that travels through space in wavelike patterns at approximately 300,000 km/s ...
... 8.3 minutes to reach Earth. The distance between Earth and the Sun can be expressed as 8.3 light minutes. electromagnetic radiation: energy that travels through space in wavelike patterns at approximately 300,000 km/s ...
Friday, August 28 - Otterbein University
... The Trouble with Angles • Angular size of an object cannot tell us its actual size – depends on how far away it is • Sun and Moon have very nearly the same angular size (30' = ½) when viewed from Earth ...
... The Trouble with Angles • Angular size of an object cannot tell us its actual size – depends on how far away it is • Sun and Moon have very nearly the same angular size (30' = ½) when viewed from Earth ...
Stars and Galaxies - Lunar and Planetary Institute
... scale up and use meters and kilometers for large numbers. ...
... scale up and use meters and kilometers for large numbers. ...
Standard EPS Shell Presentation
... Identify the structure of the Milky Way Galaxy and the location of our solar system within the galaxy. Explain how astronomers measure the distance to stars and galaxies. Identify the scientific evidence that supports the Big Bang theory. ...
... Identify the structure of the Milky Way Galaxy and the location of our solar system within the galaxy. Explain how astronomers measure the distance to stars and galaxies. Identify the scientific evidence that supports the Big Bang theory. ...
Galaxies
... • Spiral structure has been determined through radio observations – Radio observations have shown how the spiral arms move around the center of the galaxy ...
... • Spiral structure has been determined through radio observations – Radio observations have shown how the spiral arms move around the center of the galaxy ...
The interstellar medium
... While the spectral lines of the O-type star shift back and forth as the star and its faint companion orbit their center of mass, the Ca lines in the spectrum do not move. The Ca lines are due to interstellar gas along the line of sight. 1930 – R. J. Trumpler's studies of open star clusters involved ...
... While the spectral lines of the O-type star shift back and forth as the star and its faint companion orbit their center of mass, the Ca lines in the spectrum do not move. The Ca lines are due to interstellar gas along the line of sight. 1930 – R. J. Trumpler's studies of open star clusters involved ...
Astron 104 Laboratory #11 The Scale of the Milky Way
... of each galaxy. Don’t worry about the direction (left/right/up/down) for each galaxy; just place a dot an appropriate distance from the Sun. Galaxy Distance from the Sun (lt-yr) Sagittarius Dwarf Galaxy (closest to Milky Way) ...
... of each galaxy. Don’t worry about the direction (left/right/up/down) for each galaxy; just place a dot an appropriate distance from the Sun. Galaxy Distance from the Sun (lt-yr) Sagittarius Dwarf Galaxy (closest to Milky Way) ...
Hertzsprung-Russell Diagram
... • Distance to the cluster can be determined by comparing the HR diagram of the cluster with a template HR diagram ...
... • Distance to the cluster can be determined by comparing the HR diagram of the cluster with a template HR diagram ...
Document
... • Nebula: New stars form in a cloud of gas and dust. The gas and dust are pulled together by gravity in a ball and gets very dense. Temperature increases, and nuclear fusion begins and the ball of gas and dust starts to glow. • Stars don’t live forever. Stars expand as it grows old. After the hydrog ...
... • Nebula: New stars form in a cloud of gas and dust. The gas and dust are pulled together by gravity in a ball and gets very dense. Temperature increases, and nuclear fusion begins and the ball of gas and dust starts to glow. • Stars don’t live forever. Stars expand as it grows old. After the hydrog ...
parallax in arc seconds
... System. Proxima Centauri has the largest known stellar parallax at 0.76”. ...
... System. Proxima Centauri has the largest known stellar parallax at 0.76”. ...
Solutions
... see quite a number of interacting galaxies; one example is on the title page of your textbook. We never see stars in the disk of our Galaxy run into each other, however. (We do see binary stars, but they are stars which have formed together, and have always been companions.) 2. Chapter 4, Question 1 ...
... see quite a number of interacting galaxies; one example is on the title page of your textbook. We never see stars in the disk of our Galaxy run into each other, however. (We do see binary stars, but they are stars which have formed together, and have always been companions.) 2. Chapter 4, Question 1 ...
The Population of Stars
... • Distances to the nearer stars can be determined by parallax, the apparent shift of a star against the background stars observed as the Earth moves along its orbit • Parallax measurements made from orbit, above the blurring effects of the atmosphere, are much more accurate than those made with Eart ...
... • Distances to the nearer stars can be determined by parallax, the apparent shift of a star against the background stars observed as the Earth moves along its orbit • Parallax measurements made from orbit, above the blurring effects of the atmosphere, are much more accurate than those made with Eart ...
Explaining the early universe
... more powerful microscopes allowed astronomers to see more celestial bodies than they had been able to see before. ...
... more powerful microscopes allowed astronomers to see more celestial bodies than they had been able to see before. ...
numerical exercises
... internal to the Sun. If the orbital velocity curve is flat to ~16 kpc from the Galactic centre, then one can redo the calculations to find that ~21011 M is derived for the mass of the Galaxy internal to ~16 kpc from the centre. Where did the extra ~1011 M come from, or is it proper to apply Keple ...
... internal to the Sun. If the orbital velocity curve is flat to ~16 kpc from the Galactic centre, then one can redo the calculations to find that ~21011 M is derived for the mass of the Galaxy internal to ~16 kpc from the centre. Where did the extra ~1011 M come from, or is it proper to apply Keple ...
Earth Science, 10th edition Chapter 23: Beyond Our Solar System I
... Earth Science, 10th edition Chapter 23: Beyond Our Solar System I. Properties of stars A. Distance 1. Measuring a star's distance can be very difficult 2. Stellar parallax a. Used for measuring distance to a star b. Apparent shift in a star's position due to the orbital motion of Earth c. Measured a ...
... Earth Science, 10th edition Chapter 23: Beyond Our Solar System I. Properties of stars A. Distance 1. Measuring a star's distance can be very difficult 2. Stellar parallax a. Used for measuring distance to a star b. Apparent shift in a star's position due to the orbital motion of Earth c. Measured a ...
25 Study Guide
... Key Concepts • The Milky Way is a large spiral galaxy whose disk is about 100,000 light-years wide and about 10,000 light-years thick at the nucleus. • In addition to shape and size, one of the major differences among different types of galaxies is the age of their stars. • The red shifts of distant ...
... Key Concepts • The Milky Way is a large spiral galaxy whose disk is about 100,000 light-years wide and about 10,000 light-years thick at the nucleus. • In addition to shape and size, one of the major differences among different types of galaxies is the age of their stars. • The red shifts of distant ...
The Galaxy Presentation 2011
... stars younger than Sun - No very massive, short-lived stars (type O or B) - We are in a quiet “suburb,” but it was not always that way. - Hot X-Ray emitting gas coming from nearby in all directions. Surrounding hot gas is region of cooler gas (100 light years distant) - We and all our stellar neighb ...
... stars younger than Sun - No very massive, short-lived stars (type O or B) - We are in a quiet “suburb,” but it was not always that way. - Hot X-Ray emitting gas coming from nearby in all directions. Surrounding hot gas is region of cooler gas (100 light years distant) - We and all our stellar neighb ...
Irregular Galaxies
... and dust that are gravitationally bound. • How big is the Milky Way? • It is 100,000 light years wide…In other words, it would take light 100,000 years to travel across it. Even so, the Milky Way is only one tiny piece of many, many ...
... and dust that are gravitationally bound. • How big is the Milky Way? • It is 100,000 light years wide…In other words, it would take light 100,000 years to travel across it. Even so, the Milky Way is only one tiny piece of many, many ...
Lecture 2
... 4) Redshift and the Expansion of the Universe Finally we look at the application of these ideas on the largest scales of all. If we consider only the forces which we know about from laboratory physics it seems clear that gravity must dominate on very large scales and therefore that the universe sho ...
... 4) Redshift and the Expansion of the Universe Finally we look at the application of these ideas on the largest scales of all. If we consider only the forces which we know about from laboratory physics it seems clear that gravity must dominate on very large scales and therefore that the universe sho ...
Introduction to Galaxies and Cosmology Exercises 2
... c) What is the Schwarzschild radius of the black hole? 9. (Challenging) A quasar emits two radiating clouds in our general direction at 13/14 the speed of light. They are first observed when they appear to have been first produced at the central powerhouse, and are subsequently observed to move appa ...
... c) What is the Schwarzschild radius of the black hole? 9. (Challenging) A quasar emits two radiating clouds in our general direction at 13/14 the speed of light. They are first observed when they appear to have been first produced at the central powerhouse, and are subsequently observed to move appa ...
30-3
... a. they are not all the same distance from Earth. b. they are not all stars. c. they are all the same distance from Earth. d. they are not all visible from Earth. _____ 3. If you look at the same region of the sky for several nights, the positions of the stars a. appear to change in relation to one ...
... a. they are not all the same distance from Earth. b. they are not all stars. c. they are all the same distance from Earth. d. they are not all visible from Earth. _____ 3. If you look at the same region of the sky for several nights, the positions of the stars a. appear to change in relation to one ...
Universe 8e Lecture Chapter 17 Nature of Stars
... apparent shift of a star against the background stars observed as the Earth moves along its orbit. Parallax measurements made from orbit, above the blurring effects of the atmosphere, are much more accurate than those made with Earth-based telescopes. Stellar parallaxes can only be measured for star ...
... apparent shift of a star against the background stars observed as the Earth moves along its orbit. Parallax measurements made from orbit, above the blurring effects of the atmosphere, are much more accurate than those made with Earth-based telescopes. Stellar parallaxes can only be measured for star ...
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.