Powerpoint of lecture 1
... choosing constant to make scale consistent with Hipparchus. Absolute magnitude M is defined as the apparent magnitude a star ...
... choosing constant to make scale consistent with Hipparchus. Absolute magnitude M is defined as the apparent magnitude a star ...
Not Always the Southern Cross! Which Way`s South?
... Depending on where you are in the world, what time of the year it is, and how lost you are, knowing whether you are south-bound or north-bound is a good place to start. OK – for the navigational purests out there, I’ll go ahead and give you the exact way to figure it out: “Extend the line of the Cros ...
... Depending on where you are in the world, what time of the year it is, and how lost you are, knowing whether you are south-bound or north-bound is a good place to start. OK – for the navigational purests out there, I’ll go ahead and give you the exact way to figure it out: “Extend the line of the Cros ...
Characteristics of Stars
... nuclear fusion is happening at their cores… they create their own light • Have different characteristics which allow many different ‘varieties’ of stars to exist ...
... nuclear fusion is happening at their cores… they create their own light • Have different characteristics which allow many different ‘varieties’ of stars to exist ...
Powerpoint Presentation (large file)
... are glowing, ionized clouds of gas • Emission nebulae are powered by ultraviolet light that they absorb from nearby hot stars • Reflection nebulae are produced when starlight is reflected from dust grains in the interstellar medium, producing a characteristic bluish ...
... are glowing, ionized clouds of gas • Emission nebulae are powered by ultraviolet light that they absorb from nearby hot stars • Reflection nebulae are produced when starlight is reflected from dust grains in the interstellar medium, producing a characteristic bluish ...
Great Astronomers of the 20th Century
... Jill Tarter • Joint appointment at UC Berkeley and SETI ...
... Jill Tarter • Joint appointment at UC Berkeley and SETI ...
wk9 (part 1)
... • The Zero Age Main Sequence (ZAMS) represents the onset or start of nuclear burning (fusion) • The properties of a star on the ZAMS are primarily determined by its mass, somewhat dependent on chemical composition (fraction of He and heavier elements) • The classification of stars in an HR diagram b ...
... • The Zero Age Main Sequence (ZAMS) represents the onset or start of nuclear burning (fusion) • The properties of a star on the ZAMS are primarily determined by its mass, somewhat dependent on chemical composition (fraction of He and heavier elements) • The classification of stars in an HR diagram b ...
Stellar Distances - Red Hook Central School District
... magnitude to determine distance. • Need to know spectral class (MS, WD, ) of star, & surface temp. & use HR ...
... magnitude to determine distance. • Need to know spectral class (MS, WD, ) of star, & surface temp. & use HR ...
Nov 2017 - What`s Out Tonight?
... Starting from New Moon, the Moon cycles through are several stars closer than these three but they are phases every 29 days, 12 hours, 44 minutes, 3 seconds. too faint to be seen with the naked eye. It is 2,160 miles in diameter and averages 239,000 miles from Earth. A New Moon is not visible in the ...
... Starting from New Moon, the Moon cycles through are several stars closer than these three but they are phases every 29 days, 12 hours, 44 minutes, 3 seconds. too faint to be seen with the naked eye. It is 2,160 miles in diameter and averages 239,000 miles from Earth. A New Moon is not visible in the ...
Document
... 1. Of all the stars that are currently on the main sequence, which spectral type would be least abundant? a. A, b. B, c. K, d. M 2. What mechanism is responsible for the twisting of the Sun's magnetic filed lines? a. differential rotation, b. convection, c. proton-proton cycle, d. tidal forces 3. Sy ...
... 1. Of all the stars that are currently on the main sequence, which spectral type would be least abundant? a. A, b. B, c. K, d. M 2. What mechanism is responsible for the twisting of the Sun's magnetic filed lines? a. differential rotation, b. convection, c. proton-proton cycle, d. tidal forces 3. Sy ...
Teacher Sheet 1. What variables does the HR Diagram compare
... 14. Describe stars A, B, C, and D in terms of their brightness and temperature. Star A is red and therefore, cool. Its luminosity is 1/1000 of that of the sun; therefore, it is dim. Star B is a hot, blue star and very luminous. Both A and B are on the Main Sequence. Star C is also a hot, blue star. ...
... 14. Describe stars A, B, C, and D in terms of their brightness and temperature. Star A is red and therefore, cool. Its luminosity is 1/1000 of that of the sun; therefore, it is dim. Star B is a hot, blue star and very luminous. Both A and B are on the Main Sequence. Star C is also a hot, blue star. ...
Astronomy
... 30. The five naked-eye planets and three telescopic planets that wander among the stars in the sky are always near the a. horizon. b. celestial equator. c. ecliptic. d. Moon. ...
... 30. The five naked-eye planets and three telescopic planets that wander among the stars in the sky are always near the a. horizon. b. celestial equator. c. ecliptic. d. Moon. ...
A Star is Born!
... • The Zero Age Main Sequence (ZAMS) represents the onset or start of nuclear burning (fusion) • The properties of a star on the ZAMS are primarily determined by its mass, somewhat dependent on composition (He and heavier elements) ...
... • The Zero Age Main Sequence (ZAMS) represents the onset or start of nuclear burning (fusion) • The properties of a star on the ZAMS are primarily determined by its mass, somewhat dependent on composition (He and heavier elements) ...
Astronomy 120
... (b) Regulus and Capella have about the same luminosity. Which star is larger? (c) Vega and Sirius have about the same surface temperature. Which star is more luminous? (d) Which star would appear redder, Vega or Pollux? 5. Zeilik Study Exercise 13.6 What procedure does an astronomer follow to find o ...
... (b) Regulus and Capella have about the same luminosity. Which star is larger? (c) Vega and Sirius have about the same surface temperature. Which star is more luminous? (d) Which star would appear redder, Vega or Pollux? 5. Zeilik Study Exercise 13.6 What procedure does an astronomer follow to find o ...
33-3 - Fremont Peak Observatory
... BIG. The outer circumference is about 25 arc minutes, so it fills up a large portion of my field of view. Compared to other planetary nebulae, it’s only 700 light-years from Earth! There are no really bright stars close to the Helix. When I first viewed this object a few years back, I had to get in ...
... BIG. The outer circumference is about 25 arc minutes, so it fills up a large portion of my field of view. Compared to other planetary nebulae, it’s only 700 light-years from Earth! There are no really bright stars close to the Helix. When I first viewed this object a few years back, I had to get in ...
Starlight & Stars - Wayne State University Physics and Astronomy
... The Doppler effect doesn’t affect the overall color of an object, unless it is moving at a significant fraction of the speed of light (VERY fast!) For an object moving toward us, the red colors will be shifted to the orange and the near-infrared will be shifted to the red, etc. All of the colors shi ...
... The Doppler effect doesn’t affect the overall color of an object, unless it is moving at a significant fraction of the speed of light (VERY fast!) For an object moving toward us, the red colors will be shifted to the orange and the near-infrared will be shifted to the red, etc. All of the colors shi ...
Characteristics of Stars
... 22. An intermediate mass star, like the Sun lives for about_10 billion_ years. 23.When it runs out of the fuel, the core will contract and the outer layers of the star will expand to form a _red giant 24. The outer layers of the star will peel away forming a -planetary nebula . Examples of other sta ...
... 22. An intermediate mass star, like the Sun lives for about_10 billion_ years. 23.When it runs out of the fuel, the core will contract and the outer layers of the star will expand to form a _red giant 24. The outer layers of the star will peel away forming a -planetary nebula . Examples of other sta ...
Stars on the HR Diagram
... (measured in degrees Kelvin) of stars on the Chart for H-R Diagram (page 3) using data from the Table of Star Data (page 2). 2. Use one colored pencil to plot the nearest stars, 15 light years from the sun or closer, and another color for the stars that are more than 15 light years from the sun. Alt ...
... (measured in degrees Kelvin) of stars on the Chart for H-R Diagram (page 3) using data from the Table of Star Data (page 2). 2. Use one colored pencil to plot the nearest stars, 15 light years from the sun or closer, and another color for the stars that are more than 15 light years from the sun. Alt ...
Sample final exam
... to be. To help with your classification, this galaxy emits more radiation, from gamma rays to radio waves, than the Milky Way does. Explain why this type of galaxy would be expected to emit such extra radiation. 24. Below are some characteristics of stars. Your task is to separate them into two cate ...
... to be. To help with your classification, this galaxy emits more radiation, from gamma rays to radio waves, than the Milky Way does. Explain why this type of galaxy would be expected to emit such extra radiation. 24. Below are some characteristics of stars. Your task is to separate them into two cate ...
Star Classification
... temperature) vs. its luminosity (intrinsic brightness or absolute magnitude). On it, astronomers plot stars' color, temperature, luminosity, spectral type, and evolutionary stage. This diagram shows that there are 3 very different types of stars: ...
... temperature) vs. its luminosity (intrinsic brightness or absolute magnitude). On it, astronomers plot stars' color, temperature, luminosity, spectral type, and evolutionary stage. This diagram shows that there are 3 very different types of stars: ...
Corona Australis
Corona Australis /kɵˈroʊnə ɒˈstreɪlɨs/ or Corona Austrina /kɵˈroʊnə ɒˈstraɪnə/ is a constellation in the Southern Celestial Hemisphere. Its Latin name means ""southern crown"", and it is the southern counterpart of Corona Borealis, the northern crown. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The Ancient Greeks saw Corona Australis as a wreath rather than a crown and associated it with Sagittarius or Centaurus. Other cultures have likened the pattern to a turtle, ostrich nest, a tent, or even a hut belonging to a rock hyrax.Although fainter than its namesake, the oval- or horseshoe-shaped pattern of its brighter stars renders it distinctive. Alpha and Beta Coronae Australis are the two brightest stars with an apparent magnitude of around 4.1. Epsilon Coronae Australis is the brightest example of a W Ursae Majoris variable in the southern sky. Lying alongside the Milky Way, Corona Australis contains one of the closest star-forming regions to our Solar System—a dusty dark nebula known as the Corona Australis Molecular Cloud, lying about 430 light years away. Within it are stars at the earliest stages of their lifespan. The variable stars R and TY Coronae Australis light up parts of the nebula, which varies in brightness accordingly.