ASTR-1020: Astronomy II Course Lecture Notes - Faculty
... spectra of L dwarfs show strong absorption bands of H2 O and carbon monoxide (CO), the NIR spectrum of T dwarfs are dominated by absorption bands from methane (CH4 ). In addition, the metal hydride bands seen at optical wavelengths in L dwarfs are weak or absent in T dwarfs. These objects range in t ...
... spectra of L dwarfs show strong absorption bands of H2 O and carbon monoxide (CO), the NIR spectrum of T dwarfs are dominated by absorption bands from methane (CH4 ). In addition, the metal hydride bands seen at optical wavelengths in L dwarfs are weak or absent in T dwarfs. These objects range in t ...
Star Finder
... (looks like a soup dipper with three stars in the “handle” and four stars in the “cup” portion) can be found near the pole(brass pin). Find it and note that capital letters are used to identify an asterism but the letters are not as bold in white as constellation names. The font is also a bit differ ...
... (looks like a soup dipper with three stars in the “handle” and four stars in the “cup” portion) can be found near the pole(brass pin). Find it and note that capital letters are used to identify an asterism but the letters are not as bold in white as constellation names. The font is also a bit differ ...
notes
... Our sun and Proxima Centauri are only two stars that make up our Milky Way galaxy. Our galaxy contains hundreds of billions of stars. There are billions of galaxies in the Universe. ...
... Our sun and Proxima Centauri are only two stars that make up our Milky Way galaxy. Our galaxy contains hundreds of billions of stars. There are billions of galaxies in the Universe. ...
Constellations
... • Other stars “move” in circles about Polaris. • It takes 1 day to complete the circle. • The rising and setting time of a star changes with the seasons. • Stars peak overhead (zenith) 2 hours earlier each month. ...
... • Other stars “move” in circles about Polaris. • It takes 1 day to complete the circle. • The rising and setting time of a star changes with the seasons. • Stars peak overhead (zenith) 2 hours earlier each month. ...
View poster
... The solution is to start considering the Moon. Therefore the dynamic range of the star sensor had to include the brighter stars in our galaxy and the very bright Moon. Ranges from magnitudes 1 to -13 need to be covered. In the lab we have shown that the dynamic range of the star sensor can include t ...
... The solution is to start considering the Moon. Therefore the dynamic range of the star sensor had to include the brighter stars in our galaxy and the very bright Moon. Ranges from magnitudes 1 to -13 need to be covered. In the lab we have shown that the dynamic range of the star sensor can include t ...
Lecture 17: General Relativity and Black Holes
... 1. The Sun is located at the center of the Milky Way Galaxy. True or false 2. Shapley overestimated the dimensions of the Milky Way Galaxy because he failed to account for interstellar extinction by dust. True or false 3. The Herschels attempted to determine the galaxy's structure by (a) looking for ...
... 1. The Sun is located at the center of the Milky Way Galaxy. True or false 2. Shapley overestimated the dimensions of the Milky Way Galaxy because he failed to account for interstellar extinction by dust. True or false 3. The Herschels attempted to determine the galaxy's structure by (a) looking for ...
Homework #7 (Ch. 19)
... gravity continues to compress the gas and heat it until finally the core temperature reaches 10 million K, which is sufficient to initiate hydrogen fusion. The object is now a star. 3. Chaisson Review and Discussion 19.3 What is the role of rotation in the process of stellar birth? (3 points) As an ...
... gravity continues to compress the gas and heat it until finally the core temperature reaches 10 million K, which is sufficient to initiate hydrogen fusion. The object is now a star. 3. Chaisson Review and Discussion 19.3 What is the role of rotation in the process of stellar birth? (3 points) As an ...
Chapter 15 Surveying the Stars
... • All stars become larger and redder after exhausting their core hydrogen: giants and supergiants • Most stars end up small and white after fusion has ceased: white dwarfs ...
... • All stars become larger and redder after exhausting their core hydrogen: giants and supergiants • Most stars end up small and white after fusion has ceased: white dwarfs ...
A small mass difference between Hydrogen and Helium The
... From periodic wobbling back and forth of the spectral lines of a (blended) binary, we can often determine the radius of the orbit, and orbital speeds, and thus the masses of the stars From observations of binaries, we have the masses Of a sample of stars, and can study how stellar Properties depend ...
... From periodic wobbling back and forth of the spectral lines of a (blended) binary, we can often determine the radius of the orbit, and orbital speeds, and thus the masses of the stars From observations of binaries, we have the masses Of a sample of stars, and can study how stellar Properties depend ...
The power plant of the Sun and stars
... can often determine the radius of the orbit, and orbital speeds, and thus the masses of the stars From observations of binaries, we have the masses Of a sample of stars, and can study how stellar Properties depend on mass. ...
... can often determine the radius of the orbit, and orbital speeds, and thus the masses of the stars From observations of binaries, we have the masses Of a sample of stars, and can study how stellar Properties depend on mass. ...
Lecture notes 1: The human eye
... Lecture notes 1: The human eye The human eye is not much in use as a professional tool of astronomy. On the other hand, it is of great interest to understand how it works and by doing so we may illustrate many of the principles and problems that we will meet later in the course. Evolution has come u ...
... Lecture notes 1: The human eye The human eye is not much in use as a professional tool of astronomy. On the other hand, it is of great interest to understand how it works and by doing so we may illustrate many of the principles and problems that we will meet later in the course. Evolution has come u ...
Astronomy Exam #4
... A. Star α is less luminous than star γ. B. Star α has a longer main sequence lifetime than star γ. C. Star α appears brighter that star γ. D. Star α is larger in radius than star γ. 14. Which statement is the most correct about the comparison between a K5 main sequence star and a B5 main sequence st ...
... A. Star α is less luminous than star γ. B. Star α has a longer main sequence lifetime than star γ. C. Star α appears brighter that star γ. D. Star α is larger in radius than star γ. 14. Which statement is the most correct about the comparison between a K5 main sequence star and a B5 main sequence st ...
Constellation Chart Activity
... a) Find 6h of Right Ascension at the bottom of the map. The date written right below it is _________________. That means that if you go outside at 8 PM local time on that date, that line would be YOUR Meridian. b) Find Orion and Gemini along that 6h RA line. On that date at that time, Orion will be ...
... a) Find 6h of Right Ascension at the bottom of the map. The date written right below it is _________________. That means that if you go outside at 8 PM local time on that date, that line would be YOUR Meridian. b) Find Orion and Gemini along that 6h RA line. On that date at that time, Orion will be ...
Unit H557/02 - Advance Notice Article - June 2017
... Professional astronomers measure brightness with a logarithmic scale called stellar magnitudes, but this is not appropriate here. We shall deal only with absolute brightness and apparent brightness. ...
... Professional astronomers measure brightness with a logarithmic scale called stellar magnitudes, but this is not appropriate here. We shall deal only with absolute brightness and apparent brightness. ...
Topic 6 Introduction
... – Presence of H (stars have retained their H envelopes) – Found only in spiral galaxies, mainly in arms – At maximum light peak magnitude can differ by 2.0 – Wide range of expansion velocities (2000 - 20000 km/s) – At maximum light almost continuous spectrum, some (weak) H, He absorption – Lat ...
... – Presence of H (stars have retained their H envelopes) – Found only in spiral galaxies, mainly in arms – At maximum light peak magnitude can differ by 2.0 – Wide range of expansion velocities (2000 - 20000 km/s) – At maximum light almost continuous spectrum, some (weak) H, He absorption – Lat ...
mass of star
... gas. Some collapse under their own gravity. Others may be more stable. Magnetic fields and rotation also have some influence. Gravity makes cloud want to ...
... gas. Some collapse under their own gravity. Others may be more stable. Magnetic fields and rotation also have some influence. Gravity makes cloud want to ...
Why does Sirius twinkle?
... extreme, more down-to-Earth example of this would and is roughly 8.5 light years away from Earth, be heat rising off of a road or a desert causing making it one of the closest stars to us. It has a objects behind it to distort, shimmer and change tiny companion star making it a binary system compose ...
... extreme, more down-to-Earth example of this would and is roughly 8.5 light years away from Earth, be heat rising off of a road or a desert causing making it one of the closest stars to us. It has a objects behind it to distort, shimmer and change tiny companion star making it a binary system compose ...
September 2013 - astronomy for beginners
... application and shows graphically the availability of the planets during September. Along the top of the chart is the key to the colour of each planet on the chart. The vertical bars above a planet line indicate the planet will be visible from the time inferred by that line until dawn. Bars below th ...
... application and shows graphically the availability of the planets during September. Along the top of the chart is the key to the colour of each planet on the chart. The vertical bars above a planet line indicate the planet will be visible from the time inferred by that line until dawn. Bars below th ...
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 ...
Life Histories Of Some Stars
... Temperatures in the cores of large stars are much higher than the core temperatures of smaller stars. The higher the temperature inside a star, the faster hydrogen nuclei move. And the faster hydrogen nuclei move, the more likely it is that two nuclei will hit each other and fuse. So even though lar ...
... Temperatures in the cores of large stars are much higher than the core temperatures of smaller stars. The higher the temperature inside a star, the faster hydrogen nuclei move. And the faster hydrogen nuclei move, the more likely it is that two nuclei will hit each other and fuse. So even though lar ...
Life Histories Stars
... Temperatures in the cores of large stars are much higher than the core temperatures of smaller stars. The higher the temperature inside a star, the faster hydrogen nuclei move. And the faster hydrogen nuclei move, the more likely it is that two nuclei will hit each other and fuse. So even though lar ...
... Temperatures in the cores of large stars are much higher than the core temperatures of smaller stars. The higher the temperature inside a star, the faster hydrogen nuclei move. And the faster hydrogen nuclei move, the more likely it is that two nuclei will hit each other and fuse. So even though lar ...
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.