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MIDTERM #2 THURSDAY APRIL 16, 2015 AST142 1. Black hole
... Let’s check. The difference is 0.3 as we expected! The observed V (corrected for extinction) is 9.10 and the absolute magnitude is 2.7. The distance modulus is 6.3 giving a distance d = 106.3/5 × 10 = 182pc ...
... Let’s check. The difference is 0.3 as we expected! The observed V (corrected for extinction) is 9.10 and the absolute magnitude is 2.7. The distance modulus is 6.3 giving a distance d = 106.3/5 × 10 = 182pc ...
ISP 205 Review Questions, Week 13
... be related to the velocity of recession of the galaxy through the formula Δλ/λ = v/c. In this formula, λ is the "rest" wavelength of an absorption line, Δλ is the amount by which the Doppler effect has changed its wavelength, v is the velocity of the galaxy, and c is the speed of light (300,000 km/s ...
... be related to the velocity of recession of the galaxy through the formula Δλ/λ = v/c. In this formula, λ is the "rest" wavelength of an absorption line, Δλ is the amount by which the Doppler effect has changed its wavelength, v is the velocity of the galaxy, and c is the speed of light (300,000 km/s ...
PowerPoint Presentation - ASTR498E High energy
... Require knowledge of distance in order to calculate just about any other property of the object Distance is often difficult to determine! ...
... Require knowledge of distance in order to calculate just about any other property of the object Distance is often difficult to determine! ...
15.4 Star Systems and Galaxies
... A. Star system-groups of two or more stars 1. Binary stars - two stars or double stars a. Eclipsing binary-a system in which one star blocks the light from another II. Planets Around Other Stars A. Astronomers study gravitational effects on stars to see if there is a planet III. Galaxies-classified ...
... A. Star system-groups of two or more stars 1. Binary stars - two stars or double stars a. Eclipsing binary-a system in which one star blocks the light from another II. Planets Around Other Stars A. Astronomers study gravitational effects on stars to see if there is a planet III. Galaxies-classified ...
Stellar Luminosity
... On Earth, the parallax angle for the star Procyon is 0.29 arcseconds. If you were to measure Procyon’s parallax angle from Venus, what would the parallax angle be? (Note: Earth’s orbital radius is larger than ...
... On Earth, the parallax angle for the star Procyon is 0.29 arcseconds. If you were to measure Procyon’s parallax angle from Venus, what would the parallax angle be? (Note: Earth’s orbital radius is larger than ...
Lecture 1 outline handout
... Lecture: Deep Space & Deep Time 1. Range of space and time A. electrons to Universe B. microseconds (1/1,000,000 sec. ) to age of Universe (~14,000,000,000 years) 2. Units of measure A. metric system B. units of mass (M), length (L), time (T) C. converting english to metric (1 km = 0.6 mi; 1 mi = 1. ...
... Lecture: Deep Space & Deep Time 1. Range of space and time A. electrons to Universe B. microseconds (1/1,000,000 sec. ) to age of Universe (~14,000,000,000 years) 2. Units of measure A. metric system B. units of mass (M), length (L), time (T) C. converting english to metric (1 km = 0.6 mi; 1 mi = 1. ...
Final Exam Study Guide
... The escape velocity of a neutron star (speed you need to escape it) is about ________. A planetary nebula is typically formed at the same time as a(n) _______________. The process in which many stars form from a single interstellar cloud is called _______. Interstellar clouds cause stars behind them ...
... The escape velocity of a neutron star (speed you need to escape it) is about ________. A planetary nebula is typically formed at the same time as a(n) _______________. The process in which many stars form from a single interstellar cloud is called _______. Interstellar clouds cause stars behind them ...
ASTRONOMY 313
... 4. What is the angular resolution in arcseconds of the Burke-Gaffney telescope (mirror diameter = 0.6 m) when it is operating at a wavelength of = 5000 Å (5 × 10–7 m)? ...
... 4. What is the angular resolution in arcseconds of the Burke-Gaffney telescope (mirror diameter = 0.6 m) when it is operating at a wavelength of = 5000 Å (5 × 10–7 m)? ...
The Ever Expanding Universe: Part II
... But finding the parallax to a star would require very precise optics. The parallax of the closest planets, Mars and Venus are both within a thousandth of a degree so the challenge to find the parallax to even the nearest Star was indeed great. Recall how the parallax method works to find distance. T ...
... But finding the parallax to a star would require very precise optics. The parallax of the closest planets, Mars and Venus are both within a thousandth of a degree so the challenge to find the parallax to even the nearest Star was indeed great. Recall how the parallax method works to find distance. T ...
1_Introduction
... “Far away” = at a distance larger than 206,000 times the diameter of a star. 206,000 × Sun’s diameter = 290 billion kilometers = 11 light-days ...
... “Far away” = at a distance larger than 206,000 times the diameter of a star. 206,000 × Sun’s diameter = 290 billion kilometers = 11 light-days ...
Physical properties of stars
... Absolute magnitude depends on: The size of the star The temperature of the star Apparent magnitude depends on: The size of the star The temperature of the star The distance of the star Pg. 444 scale of objects and their apparent magnitude. Absolute motion- the actual motion of stars in spa ...
... Absolute magnitude depends on: The size of the star The temperature of the star Apparent magnitude depends on: The size of the star The temperature of the star The distance of the star Pg. 444 scale of objects and their apparent magnitude. Absolute motion- the actual motion of stars in spa ...
Ch 29 Sun and Solar Activity
... atmosphere, disrupt longrange radios, satell. & radar • solar flame animation ...
... atmosphere, disrupt longrange radios, satell. & radar • solar flame animation ...
Mathematical Reasoning
... Ratios and Proportions: To solve comparative problems for two related objects or conditions Suppose two stars are identical, but star B is 4 times farther away than star A. What is the brightness ratio between star A and star B? Brightness A α 1 / (distance A)2 Brightness B α 1 / (distance B)2 Brigh ...
... Ratios and Proportions: To solve comparative problems for two related objects or conditions Suppose two stars are identical, but star B is 4 times farther away than star A. What is the brightness ratio between star A and star B? Brightness A α 1 / (distance A)2 Brightness B α 1 / (distance B)2 Brigh ...
Pistol Star of the Pistol Nebula
... 10^6.3) and appears to have more than 150 Solar-masses, having been resolved as a single star down to a projected separation of 110 AUs (Figer et al, 1998). Indeed, the star may have started with as much as 200 to 250 Solar-masses but has been violently shedding much of its substance. With over 40 S ...
... 10^6.3) and appears to have more than 150 Solar-masses, having been resolved as a single star down to a projected separation of 110 AUs (Figer et al, 1998). Indeed, the star may have started with as much as 200 to 250 Solar-masses but has been violently shedding much of its substance. With over 40 S ...
17.1 Introduction
... determination of distances to astronomical objects is fraught with difficulties and plagued by systematic uncertainties. Indeed, the history of the determination of the Hubble constant does not show astronomers in a good light: for decades there were two ‘camps’, one claiming H0 = 50 km s−1 Mpc−1 an ...
... determination of distances to astronomical objects is fraught with difficulties and plagued by systematic uncertainties. Indeed, the history of the determination of the Hubble constant does not show astronomers in a good light: for decades there were two ‘camps’, one claiming H0 = 50 km s−1 Mpc−1 an ...
Distance
... Ques4ons • How much does the apparent brightness of stars we see in the sky vary? Why? • Stars have different colors? So is the amount of light at different wavelengths the same? • Can we tell the difference between a very luminous star that is far away and in intrinsically low luminosity st ...
... Ques4ons • How much does the apparent brightness of stars we see in the sky vary? Why? • Stars have different colors? So is the amount of light at different wavelengths the same? • Can we tell the difference between a very luminous star that is far away and in intrinsically low luminosity st ...
Stellar Evolution
... The Big Bang • Tremendous explosion started the expansion of the universe • All of the matter and energy of the universe was contained at one point ...
... The Big Bang • Tremendous explosion started the expansion of the universe • All of the matter and energy of the universe was contained at one point ...
chapter 18
... helium nuclei to form carbon nuclei. c) hydrogen nuclei to form helium nuclei. d) carbon nuclei to form magnesium nuclei. ...
... helium nuclei to form carbon nuclei. c) hydrogen nuclei to form helium nuclei. d) carbon nuclei to form magnesium nuclei. ...
Public Lecture - Size of the Universe
... – Used to measure galactic distances – Kiloparsec (1000 pc) and Megaparsec (1,000,000 pc) used for extragalactic distances ...
... – Used to measure galactic distances – Kiloparsec (1000 pc) and Megaparsec (1,000,000 pc) used for extragalactic distances ...
astronomy 2 review sheet - Hicksville Public Schools
... 6. What does the lifetime of a star depend on? IT’S MASS. 7. What is a supernova? EXPLOSION OF A HIGH MASS STAR. 8. What is a star system? A GROUP OF TWO OR MORE STARS. 9. What are eclipsing binary stars? A STAR SYSTEM WHERE ONE STAR BLOCKS THE LIGHT OF THE OTHER STAR AT REGULAR INTERVALS. 10. What ...
... 6. What does the lifetime of a star depend on? IT’S MASS. 7. What is a supernova? EXPLOSION OF A HIGH MASS STAR. 8. What is a star system? A GROUP OF TWO OR MORE STARS. 9. What are eclipsing binary stars? A STAR SYSTEM WHERE ONE STAR BLOCKS THE LIGHT OF THE OTHER STAR AT REGULAR INTERVALS. 10. What ...
20 Stars/Distances/Magnitudes
... 4. For this same star, what is the TOTAL ANGLULAR shift you expect to be able to observe in 6 months? (parallax angle was 1/10 of an arcsecond) A. ...
... 4. For this same star, what is the TOTAL ANGLULAR shift you expect to be able to observe in 6 months? (parallax angle was 1/10 of an arcsecond) A. ...
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.