tutorial1_2014
... Calculate their angular separation if we treat them as points on a planar triangle. Now calculate their separation treating them as points on a sphere. Under which conditions would the two answers be closest? Question 3: Derive the transformation equations for converting from Galactic to Supergalact ...
... Calculate their angular separation if we treat them as points on a planar triangle. Now calculate their separation treating them as points on a sphere. Under which conditions would the two answers be closest? Question 3: Derive the transformation equations for converting from Galactic to Supergalact ...
Brightness + Magnitude of Stars
... A. Apparent or Relative Brightness-(cont.) *** As distance to Star Decreases brightness Increases (Inverse Relationship) *** As Luminosity of Star increases brightness Increases (Direct Relationship) B. Apparent Magnitude A number assigned to a celestial object that is a measure of its relative br ...
... A. Apparent or Relative Brightness-(cont.) *** As distance to Star Decreases brightness Increases (Inverse Relationship) *** As Luminosity of Star increases brightness Increases (Direct Relationship) B. Apparent Magnitude A number assigned to a celestial object that is a measure of its relative br ...
Slide 1
... large spirals, 12 dwarf ellipticals, 4 ellipticals, and 8 Irr. Dust in the plane of the Milky Way may obscure more. ...
... large spirals, 12 dwarf ellipticals, 4 ellipticals, and 8 Irr. Dust in the plane of the Milky Way may obscure more. ...
Galaxy Notes Presentation
... giant spiral galaxy including our Sun The disk’s diameter is 100,000 light years Mass is 1,000 to 2,000 billion times the mass of the Sun The Sun lies a little more than 30,000 light years from the center Cannot actually count the number of stars in the galaxy, can estimate as roughly 100 bi ...
... giant spiral galaxy including our Sun The disk’s diameter is 100,000 light years Mass is 1,000 to 2,000 billion times the mass of the Sun The Sun lies a little more than 30,000 light years from the center Cannot actually count the number of stars in the galaxy, can estimate as roughly 100 bi ...
Uniqueness of the Earth, Lebo, 7-30
... Most all stars in the Milky Way are in the central bulge, a globular cluster or a spiral arm. In each of these locations the star densities are too high – the planetary orbits would be unstable. ...
... Most all stars in the Milky Way are in the central bulge, a globular cluster or a spiral arm. In each of these locations the star densities are too high – the planetary orbits would be unstable. ...
P10263v1.2 Lab 5 Text
... rather out-of-date and unreliable, so we will ignore those. Step 2 Absolute Magnitude Measuring the absolute (or intrinsic) properties of stars is somewhat more difficult, but we know that all stars radiate energy according to the following formula: ...
... rather out-of-date and unreliable, so we will ignore those. Step 2 Absolute Magnitude Measuring the absolute (or intrinsic) properties of stars is somewhat more difficult, but we know that all stars radiate energy according to the following formula: ...
MAUI STARGAZING MAY OBSERVING LIST DEEP SPACE
... CONSTELLATIONS - A constellation is a specific area of the celestial sphere as defined by the International Astronomical Union (IAU). There are 88 officially recognized constellations, covering the entire sky. GALAXIES A galaxy is a gravitationally bound system of stars, stellar remnants, interstell ...
... CONSTELLATIONS - A constellation is a specific area of the celestial sphere as defined by the International Astronomical Union (IAU). There are 88 officially recognized constellations, covering the entire sky. GALAXIES A galaxy is a gravitationally bound system of stars, stellar remnants, interstell ...
The Family of Stars
... With ground-based telescopes, we can measure parallaxes p ≥ 0.02 arc sec => d ≤ 50 pc ...
... With ground-based telescopes, we can measure parallaxes p ≥ 0.02 arc sec => d ≤ 50 pc ...
Which property of a star would not change if we could observe it
... • A star emits light in all directions, like a light bulb. We see the photons that are heading in our direction • As you move away from the star, fewer and fewer photons are heading directly for us, so the star seems to ...
... • A star emits light in all directions, like a light bulb. We see the photons that are heading in our direction • As you move away from the star, fewer and fewer photons are heading directly for us, so the star seems to ...
Purpose The student will explore parallax, a primary distance
... for you and your partner. Compare these two numbers to the distances found in Step 3a. Is there a relationship between the two sets of numbers? 5. In astronomy, we use a "baseline" of the diameter of the Earth's orbit. The infinite background is made of stars much farther away than the star or objec ...
... for you and your partner. Compare these two numbers to the distances found in Step 3a. Is there a relationship between the two sets of numbers? 5. In astronomy, we use a "baseline" of the diameter of the Earth's orbit. The infinite background is made of stars much farther away than the star or objec ...
AST 443/PHY 517 Homework 1
... 1. What is the Julian date at midnight CST on 2-3 September 2013? 2. What is the CST of local midnight? 3. At midnight CST: Compute the hour angles of the 5 brightest stars. Which, if any, are observable (zenith distance <60o )? Which, if any, are above the horizon? 4. Which of these 5 stars can be ...
... 1. What is the Julian date at midnight CST on 2-3 September 2013? 2. What is the CST of local midnight? 3. At midnight CST: Compute the hour angles of the 5 brightest stars. Which, if any, are observable (zenith distance <60o )? Which, if any, are above the horizon? 4. Which of these 5 stars can be ...
Learning Objectives
... 2. In one of your images, select the Cepheid star and label it. Select the reference star and label it. 3. Select “Find Sources In All Images”. Check a few of your other images to confirm that Afterglow did this correctly. Note that some of the images might be rotated 180°, depending on which side o ...
... 2. In one of your images, select the Cepheid star and label it. Select the reference star and label it. 3. Select “Find Sources In All Images”. Check a few of your other images to confirm that Afterglow did this correctly. Note that some of the images might be rotated 180°, depending on which side o ...
Answer titese questions on a piece of loose leaf paper.
... S. On what two things does the absolute brightness of a star depend? 9. "What unit do astronomers use to measure distances between stars? • 10. Astronomers often use to measure distances to nearby stars. Qiini: Think about the thumb demo we didin class.) I I . The Hcrczspiung-Russcll diagram shows t ...
... S. On what two things does the absolute brightness of a star depend? 9. "What unit do astronomers use to measure distances between stars? • 10. Astronomers often use to measure distances to nearby stars. Qiini: Think about the thumb demo we didin class.) I I . The Hcrczspiung-Russcll diagram shows t ...
5. cosmic distance ladder ii: standard candles
... 2. In one of your images, select the Cepheid star and label it. Select the reference star and label it. 3. Select “Find Sources In All Images”. Check a few of your other images to confirm that Afterglow did this correctly. Note that some of the images might be rotated 180°, depending on which side o ...
... 2. In one of your images, select the Cepheid star and label it. Select the reference star and label it. 3. Select “Find Sources In All Images”. Check a few of your other images to confirm that Afterglow did this correctly. Note that some of the images might be rotated 180°, depending on which side o ...
The Milky Way powepoint
... The farthest known quasar is about 12 billion light-years away. When we look out into space, out beyond the quasars, we are really looking back into time. Why are all galaxies moving away from us? Why should the galaxies farthest away from us move away the fastest? What’s so special about us? ...
... The farthest known quasar is about 12 billion light-years away. When we look out into space, out beyond the quasars, we are really looking back into time. Why are all galaxies moving away from us? Why should the galaxies farthest away from us move away the fastest? What’s so special about us? ...
The Milky Way
... • How does the sky appear to move as Earth rotates? • What causes the seasons? • How can astronomical cycles affect Earth’s climate? As you study the sky and its motions, you will be learning to think of Earth as a planet rotating on its axis. The next chapter will introduce you to some of the most ...
... • How does the sky appear to move as Earth rotates? • What causes the seasons? • How can astronomical cycles affect Earth’s climate? As you study the sky and its motions, you will be learning to think of Earth as a planet rotating on its axis. The next chapter will introduce you to some of the most ...
STAR FORMATION (Ch. 19) The basics: GRAVITY vs. PRESSURE
... to become opaque to its own radiation, so it heats up, slowing the collapse. (Previously it was transparent and so could stay cool because radiation escaped easily.) 4. Protostar—now object has a “surface” because it is opaque; this surface is the photosphere (the layer where the photons can finally ...
... to become opaque to its own radiation, so it heats up, slowing the collapse. (Previously it was transparent and so could stay cool because radiation escaped easily.) 4. Protostar—now object has a “surface” because it is opaque; this surface is the photosphere (the layer where the photons can finally ...
Chapter 28 – Stars and Galaxies
... 1. The actual brightness of the star is luminosity 2. If two stars have the same surface temperature, the larger star would be more luminous 3. If the same size, hotter one would be brighter 4. Types of magnitude a. Absolute – as if all stars were same distance from earth b. Apparent – as they appea ...
... 1. The actual brightness of the star is luminosity 2. If two stars have the same surface temperature, the larger star would be more luminous 3. If the same size, hotter one would be brighter 4. Types of magnitude a. Absolute – as if all stars were same distance from earth b. Apparent – as they appea ...
From the Everett and Seattle Astronomical
... There are several types of nebulae. Emission nebulae are clouds of high temperature gas. The atoms in the cloud are energized by ultraviolet light from a nearby star and emit radiation as they fall back into lower energy states. Emission nebulae are sites of recent and ongoing star formation. The Or ...
... There are several types of nebulae. Emission nebulae are clouds of high temperature gas. The atoms in the cloud are energized by ultraviolet light from a nearby star and emit radiation as they fall back into lower energy states. Emission nebulae are sites of recent and ongoing star formation. The Or ...
Hubble Law Worksheet
... -A board the thumbtacks can stick into (Anything that works: cork, wood, foam board, etc.) -A ruler -Graph paper ...
... -A board the thumbtacks can stick into (Anything that works: cork, wood, foam board, etc.) -A ruler -Graph paper ...
Document
... 11. Describe how scientists classify stars. ____________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________ 12. Explain how stars at different stages in thei ...
... 11. Describe how scientists classify stars. ____________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________ 12. Explain how stars at different stages in thei ...
Corresponding Angles and Distances forvJarded expressly for
... orbit; but the stars, which have latterly been gradually approaching, have within the last two years closed up so rapidly as to be in the early part of the current year quite beyond the power of my instrument, the distance being estimated as not exceeding o"· 4, while only a rough guess could be mad ...
... orbit; but the stars, which have latterly been gradually approaching, have within the last two years closed up so rapidly as to be in the early part of the current year quite beyond the power of my instrument, the distance being estimated as not exceeding o"· 4, while only a rough guess could be mad ...
Lecture 26
... So what the heck are these various objects? • They appear to be related to the very center (nucleus) of the galaxies • Can we get any clues by looking at the center of OUR galaxy? ...
... So what the heck are these various objects? • They appear to be related to the very center (nucleus) of the galaxies • Can we get any clues by looking at the center of OUR galaxy? ...
Astronomy 360 - Indiana State University
... magnitude of a first magnitude star to a 6th magnitude star is a factor of 100. Thus a 1st mag star is 100 times brighter than a 6th mag star. This represents a range of 5 so that 2.512 = the fifth root of 100. Thus the table hierarchy is the Absolute Magnitude is defined as how following. Magnitude ...
... magnitude of a first magnitude star to a 6th magnitude star is a factor of 100. Thus a 1st mag star is 100 times brighter than a 6th mag star. This represents a range of 5 so that 2.512 = the fifth root of 100. Thus the table hierarchy is the Absolute Magnitude is defined as how following. Magnitude ...
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.