Review 1 Solutions
... 7. Jupiter’s moon Callisto has lots and lots of craters, whereas another moon, Io, has almost none. What does this tell us about Io and Callisto? Io has a younger surface than Callisto. From other observations, we know this is because of volcanic activity on Io that constantly replenishes its surfac ...
... 7. Jupiter’s moon Callisto has lots and lots of craters, whereas another moon, Io, has almost none. What does this tell us about Io and Callisto? Io has a younger surface than Callisto. From other observations, we know this is because of volcanic activity on Io that constantly replenishes its surfac ...
Distance Ladder
... •Typically 300 km/s or so How to to determine distances: is moving away from us at •Measure v using Doppler shift 2100 km/s? A) 1 Mly D) 484 Mly •Deduce the distance from: B) 10 Mly E) 4,840 Mly v = H0d C) 100 Mly F) 48,400 Mly ...
... •Typically 300 km/s or so How to to determine distances: is moving away from us at •Measure v using Doppler shift 2100 km/s? A) 1 Mly D) 484 Mly •Deduce the distance from: B) 10 Mly E) 4,840 Mly v = H0d C) 100 Mly F) 48,400 Mly ...
Components of Universe
... What can you see with the naked eye? [outside of the Solar System] - Milky Way stars! (meaning only stars in our own galaxy) i.e., you cannot see any individual stars in any other galaxy;-- they’re just too far and too faint ...
... What can you see with the naked eye? [outside of the Solar System] - Milky Way stars! (meaning only stars in our own galaxy) i.e., you cannot see any individual stars in any other galaxy;-- they’re just too far and too faint ...
TAP 704- 8: The ladder of astronomical distances
... detected outside the Milky Way Galaxy, in a ‘satellite’ star cluster called the Large Magellanic Cloud, visible to the naked eye in the Southern Hemisphere. These Cepheid variable stars vary in brightness over periods from 2 to 200 days. Detecting them calls for painstaking examination and measureme ...
... detected outside the Milky Way Galaxy, in a ‘satellite’ star cluster called the Large Magellanic Cloud, visible to the naked eye in the Southern Hemisphere. These Cepheid variable stars vary in brightness over periods from 2 to 200 days. Detecting them calls for painstaking examination and measureme ...
ppt
... Slipher measured velocities of nearby galaxies – by 1922, he found that 36 out of 41 were moving away from us! ...
... Slipher measured velocities of nearby galaxies – by 1922, he found that 36 out of 41 were moving away from us! ...
Goal: To understand how we know distances to
... Apparent vs. absolute magnitudes • If you compare the apparent and absolute magnitudes of an object you get its distance. • How to do that? • 1) spectra – tells you what the mass of the star is by its temperature and its spectral type (although does not work so well for giants – works great for mai ...
... Apparent vs. absolute magnitudes • If you compare the apparent and absolute magnitudes of an object you get its distance. • How to do that? • 1) spectra – tells you what the mass of the star is by its temperature and its spectral type (although does not work so well for giants – works great for mai ...
Goal: To understand how we know distances to various
... Apparent vs. absolute magnitudes • If you compare the apparent and absolute magnitudes of an object you get its distance. • How to do that? • 1) spectra – tells you what the mass of the star is by its temperature and its spectral type (although does not work so well for giants – works great for mai ...
... Apparent vs. absolute magnitudes • If you compare the apparent and absolute magnitudes of an object you get its distance. • How to do that? • 1) spectra – tells you what the mass of the star is by its temperature and its spectral type (although does not work so well for giants – works great for mai ...
How Big is Big? Integrated Science 2 Name: Date: Pd: Select items
... A billion is 109 or 1,000,000,000. And it is a BIG number! There are many cases in which numbers like a billion are used to describe topics in science, such as the age of the universe, the length of a galaxy, or number of stars in a galaxy. Before we begin to look at our Origins unit, which covers t ...
... A billion is 109 or 1,000,000,000. And it is a BIG number! There are many cases in which numbers like a billion are used to describe topics in science, such as the age of the universe, the length of a galaxy, or number of stars in a galaxy. Before we begin to look at our Origins unit, which covers t ...
lect3 — 1 Measuring stars: What can be measured?
... Hence by measuring the apparent magnitude m, and somehow knowing the absolute magnitude M (i.e. the true luminosity), one can infer the distance D (in pc). H-R diagram distance: We discussed the H-R diagram last time as a relation between temperature and luminosity. In observational terms, it is act ...
... Hence by measuring the apparent magnitude m, and somehow knowing the absolute magnitude M (i.e. the true luminosity), one can infer the distance D (in pc). H-R diagram distance: We discussed the H-R diagram last time as a relation between temperature and luminosity. In observational terms, it is act ...
The Brightness of Stars
... the square of its distance from us. Knowing this helps astronomers find its distance using a method known as standard candles ...
... the square of its distance from us. Knowing this helps astronomers find its distance using a method known as standard candles ...
Summer 2001 Day 07: Intro to Solar System
... iii) The star Proxima Centauri has a parallax of about ¾ of an arc second corresponding to a distance of 1.3 parsecs D) What is a parsec? i) a unit of distance commonly used to express astronomical distances between stars ii) In the solar neighborhood 1 parsec is about the average distance between s ...
... iii) The star Proxima Centauri has a parallax of about ¾ of an arc second corresponding to a distance of 1.3 parsecs D) What is a parsec? i) a unit of distance commonly used to express astronomical distances between stars ii) In the solar neighborhood 1 parsec is about the average distance between s ...
Stellar Magnitude, Distance, and Motion
... o Distance to M87 in the Virgo cluster: 50 million light years. o Distance to most distant object seen in the universe: about 18 billion ...
... o Distance to M87 in the Virgo cluster: 50 million light years. o Distance to most distant object seen in the universe: about 18 billion ...
File
... 24) What shape is the Milky Way? 25) What is the local group? 26) How many stars are in the Milky Way? 27) Approximately how big is the Milky Way 28) The largest known galaxy is what type of galaxy? 29) What is a light year? Section 4 30) What is cosmology? 31) How old is the universe? 32) What is t ...
... 24) What shape is the Milky Way? 25) What is the local group? 26) How many stars are in the Milky Way? 27) Approximately how big is the Milky Way 28) The largest known galaxy is what type of galaxy? 29) What is a light year? Section 4 30) What is cosmology? 31) How old is the universe? 32) What is t ...
Unit 12 Guide: Concepts of Earth Science Stars, Galaxies, and the
... 1. What are the names and characteristics of the three types of galaxies? What type of galaxy is the Milky Way galaxy? 2. What evidence do scientists use to support the Big Bang Theory? Explain the sequence of events predicted by the Big Bang Theory. 3. Explain Hubble’s Law. 4. Compare and contrast ...
... 1. What are the names and characteristics of the three types of galaxies? What type of galaxy is the Milky Way galaxy? 2. What evidence do scientists use to support the Big Bang Theory? Explain the sequence of events predicted by the Big Bang Theory. 3. Explain Hubble’s Law. 4. Compare and contrast ...
Measuring large distances
... farther, we look back in time : light takes billions of years to reach us from the edges of the universe. Since clusters of galaxies were denser and hotter in the early universe, the farther away a galaxy cluster is, the hotter it should ...
... farther, we look back in time : light takes billions of years to reach us from the edges of the universe. Since clusters of galaxies were denser and hotter in the early universe, the farther away a galaxy cluster is, the hotter it should ...
Word
... b. In terms of the width of our Solar System (e.g., diameter of the Oort Cloud is ~105 AU), how long does it take for our Solar System to move its own diameter? ...
... b. In terms of the width of our Solar System (e.g., diameter of the Oort Cloud is ~105 AU), how long does it take for our Solar System to move its own diameter? ...
lecture23
... All stars in a cluster are at about same distance from Earth. All stars in a cluster are of about the same age. Clusters therefore are natural laboratory in which mass, rather than age, of stars is only significant variable. ...
... All stars in a cluster are at about same distance from Earth. All stars in a cluster are of about the same age. Clusters therefore are natural laboratory in which mass, rather than age, of stars is only significant variable. ...
PowerPoint Presentation - Properties of Stars
... opening and closing each eye until you can no longer detect any parallax. How far did your partner get? Questions: a) How does parallax vary with distance of the pen from your face? b) Is this method useful for finding distances to very far away things? Why or why not? c) To measure a parallax, you ...
... opening and closing each eye until you can no longer detect any parallax. How far did your partner get? Questions: a) How does parallax vary with distance of the pen from your face? b) Is this method useful for finding distances to very far away things? Why or why not? c) To measure a parallax, you ...
Module Outlines
... magnitude 1 – the brightest stars magnitude 2 magnitude 3 magnitude 4 magnitude 5 magnitude 6 – the faintest stars Today, the magnitude system has been extended to include much fainter and brighter objects. ...
... magnitude 1 – the brightest stars magnitude 2 magnitude 3 magnitude 4 magnitude 5 magnitude 6 – the faintest stars Today, the magnitude system has been extended to include much fainter and brighter objects. ...
v3 Long theoretical questions Instructions 1. You will receive in your
... Hints: Try to establish a relation that describe the dependence of the spectral density of flux on distance for small wavelength interval. Normal elliptical galaxies have maximum absolute magnitude equal to -22 mag. 3. The planetarium program 'Guide' gives the following data for two solar mass stars ...
... Hints: Try to establish a relation that describe the dependence of the spectral density of flux on distance for small wavelength interval. Normal elliptical galaxies have maximum absolute magnitude equal to -22 mag. 3. The planetarium program 'Guide' gives the following data for two solar mass stars ...
Used for stars w/in a few hundred LY
... Define and use an astronomical unit to measure distances in space. Define and use a light year to measure distances in space. ...
... Define and use an astronomical unit to measure distances in space. Define and use a light year to measure distances in space. ...
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.