slides - Department of Physics and Astronomy
... It is often said that stars twinkle but planets won’t. Do you agree? On hot summer days often you see the view closer to the surface of a paved road blurry and wavy. Why? Twinkling is not desirable for astronomical observations since it blurs astronomical images. What could astronomers do to overcom ...
... It is often said that stars twinkle but planets won’t. Do you agree? On hot summer days often you see the view closer to the surface of a paved road blurry and wavy. Why? Twinkling is not desirable for astronomical observations since it blurs astronomical images. What could astronomers do to overcom ...
PS 224, Fall 2014 HW 4
... 3. Future Skies. As a red giant, the Sun will have an angular size in Earth’s sky of about 30°. What will sunset and sunrise be like? Do you think the color of the sky will be different from what it is today? Explain. The Sun will have an angular size of 30°. The setting position moves through the ...
... 3. Future Skies. As a red giant, the Sun will have an angular size in Earth’s sky of about 30°. What will sunset and sunrise be like? Do you think the color of the sky will be different from what it is today? Explain. The Sun will have an angular size of 30°. The setting position moves through the ...
Falling Stars
... hundreds of stars falling every minute! All night, the sky was brightened by meteors that rocketed through the night by the thousands! Since no telescopes or fancy equipment were needed to see the storm, ordinary people were able to see that wonderful and rare sight. Many artists tried to paint pict ...
... hundreds of stars falling every minute! All night, the sky was brightened by meteors that rocketed through the night by the thousands! Since no telescopes or fancy equipment were needed to see the storm, ordinary people were able to see that wonderful and rare sight. Many artists tried to paint pict ...
Phobos
... gravitational field of a foreground star amplifies the light of a background star that momentarily aligns with it. The particular character of the light magnification can reveal clues to the nature of the foreground star and any associated planets. However, without identification and characterizatio ...
... gravitational field of a foreground star amplifies the light of a background star that momentarily aligns with it. The particular character of the light magnification can reveal clues to the nature of the foreground star and any associated planets. However, without identification and characterizatio ...
Exercise 4 (Stars and the universe) Suggested answers
... Exercise 4 (Stars and the universe) Suggested answers 1. (a) The star is nearly a blackbody, the spectrum of a star can be approximated as a blackbody radiation curve. On the curve, there is a peak which shifts to shorter wavelength when the temperature of the blackbody increases. From the position ...
... Exercise 4 (Stars and the universe) Suggested answers 1. (a) The star is nearly a blackbody, the spectrum of a star can be approximated as a blackbody radiation curve. On the curve, there is a peak which shifts to shorter wavelength when the temperature of the blackbody increases. From the position ...
The Hertzsprung-Russell Diagram
... Equal Radius Lines In general the hotter the star is the brighter it will be. Thus you would expect stars of the same size but different temperatures to form a diagonal line called an equal radius line. Equal Radius lines can be added to an H-R diagram ...
... Equal Radius Lines In general the hotter the star is the brighter it will be. Thus you would expect stars of the same size but different temperatures to form a diagonal line called an equal radius line. Equal Radius lines can be added to an H-R diagram ...
The Milky Way
... It's a hundred thousand light years side to side. It bulges in the middle, sixteen thousand light years thick, But out by us, it's just three thousand light years wide. We're thirty thousand light years from galactic central point. We go 'round every two hundred million years, And our galaxy is only ...
... It's a hundred thousand light years side to side. It bulges in the middle, sixteen thousand light years thick, But out by us, it's just three thousand light years wide. We're thirty thousand light years from galactic central point. We go 'round every two hundred million years, And our galaxy is only ...
Photoelectric Photometry of the Pleiades
... Place the clear plastic over your graph, and using the ruler trace both x and y axes. Label and scale the x axis the same as the graph paper, but number the scale of the y axis of the plastic overlay to range from -8 (at the top) to +17 (at the bottom). Label this new y axis V ABSOLUTE MAGNITUDE (Se ...
... Place the clear plastic over your graph, and using the ruler trace both x and y axes. Label and scale the x axis the same as the graph paper, but number the scale of the y axis of the plastic overlay to range from -8 (at the top) to +17 (at the bottom). Label this new y axis V ABSOLUTE MAGNITUDE (Se ...
Basic Properties of Stars
... visual binary, a spectrum binary, a spectroscopic binary, and/or an eclipsing binary, depending on what we see. ...
... visual binary, a spectrum binary, a spectroscopic binary, and/or an eclipsing binary, depending on what we see. ...
Ch. 17 (RGs & WDs)
... In 1604, stars within a constellation were ranked in order of brightness, and labeled with Greek letters (Alpha Centauri) [Bayer notation] Uranometria – Bayer’s star atlas (1603) In the early 18th century, stars were numbered from west to east in a constellation (61 Cygni) [Flamsteed notation] John ...
... In 1604, stars within a constellation were ranked in order of brightness, and labeled with Greek letters (Alpha Centauri) [Bayer notation] Uranometria – Bayer’s star atlas (1603) In the early 18th century, stars were numbered from west to east in a constellation (61 Cygni) [Flamsteed notation] John ...
Type Ia supernovae and the ESSENCE supernova survey
... stars in the sky are said to be “of the first magnitude”. The faintest stars visible to the unaided eye are 6th magnitude. For two stars of intensity I1 and I2 their apparent magnitudes are related as follows: m2 – m1 = log (I2/I1) Thus, if we receive 100 times as many photons per second from ...
... stars in the sky are said to be “of the first magnitude”. The faintest stars visible to the unaided eye are 6th magnitude. For two stars of intensity I1 and I2 their apparent magnitudes are related as follows: m2 – m1 = log (I2/I1) Thus, if we receive 100 times as many photons per second from ...
Two Summers in the UCSC Science Internship Program
... Science that year, I hoped to apply computer programming to cutting-edge research in astrophysics. I was excited when I was assigned to work with Dr. Guhathakurta and Dr. Evan Kirby of Caltech, as well as another high school student who was my partner. ...
... Science that year, I hoped to apply computer programming to cutting-edge research in astrophysics. I was excited when I was assigned to work with Dr. Guhathakurta and Dr. Evan Kirby of Caltech, as well as another high school student who was my partner. ...
STEM for TY Teachers
... of gas, dust, and other materials "clump" together to form larger masses, which attract further matter, and eventually become massive enough to form stars. The remaining materials are then believed to form planets, and other planetary system objects. ...
... of gas, dust, and other materials "clump" together to form larger masses, which attract further matter, and eventually become massive enough to form stars. The remaining materials are then believed to form planets, and other planetary system objects. ...
2009_ASU_Exam
... a) What is the name of this object? b) What type of variability does this object exhibit? c) Which image shows a close-up of the surface of this object? d) Which image shows a light curve that represents the eventual catastrophic collapse of this object? e) This object is 1400 light-years from Earth ...
... a) What is the name of this object? b) What type of variability does this object exhibit? c) Which image shows a close-up of the surface of this object? d) Which image shows a light curve that represents the eventual catastrophic collapse of this object? e) This object is 1400 light-years from Earth ...
Binary Star - Armagh Observatory
... formations of gas, dust, and other materials "clump" together to form larger masses, which attract further matter, and eventually become massive enough to form stars. The remaining materials are then believed to form planets, and other planetary system objects. ...
... formations of gas, dust, and other materials "clump" together to form larger masses, which attract further matter, and eventually become massive enough to form stars. The remaining materials are then believed to form planets, and other planetary system objects. ...
Chapter10 (with interactive links)
... us in the sky. This generally a number between 0 (very bright) and 6 (faintest human eye can see in a dark sky). A difference in magnitude of 1 is a factor in brightness of 2.5. Venus can have a negative apparent magnitude! ...
... us in the sky. This generally a number between 0 (very bright) and 6 (faintest human eye can see in a dark sky). A difference in magnitude of 1 is a factor in brightness of 2.5. Venus can have a negative apparent magnitude! ...
20 pm - Starmap
... Using binoculars, preferably with a tripod, will considerably enhance your star gazing experience. Many deep sky objects like galaxies and clusters will be within reach. Jupiter satellites and Saturn’s rings will also be visible. A spectacular experience for beginners in astronomy... ...
... Using binoculars, preferably with a tripod, will considerably enhance your star gazing experience. Many deep sky objects like galaxies and clusters will be within reach. Jupiter satellites and Saturn’s rings will also be visible. A spectacular experience for beginners in astronomy... ...
Project 2. CCD Photometry
... Rather than just have one apparent magnitude, measured across the entire visible spectrum we can use a filter to restrict the incoming light to a narrow waveband. If, for instance, we use a filter that only allows light in the blue part of the spectrum, we can measure a star's blue ...
... Rather than just have one apparent magnitude, measured across the entire visible spectrum we can use a filter to restrict the incoming light to a narrow waveband. If, for instance, we use a filter that only allows light in the blue part of the spectrum, we can measure a star's blue ...
The Evolution of Low Mass Stars
... core of the star remains. This is called a white dwarf. It is not hot enough to fuse C and O, so it will cool and fade very slowly forever. ...
... core of the star remains. This is called a white dwarf. It is not hot enough to fuse C and O, so it will cool and fade very slowly forever. ...
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.