ASTR-264-Lecture
... Windows are both mirrors and transmitters Rose is red because rose reflects red light 5.2 what is light? Light can either act like a wave or a particle Photons: particles of light Wave: pattern of motion that can carry energy without carrying matter along with it Wavelength: is the distance between ...
... Windows are both mirrors and transmitters Rose is red because rose reflects red light 5.2 what is light? Light can either act like a wave or a particle Photons: particles of light Wave: pattern of motion that can carry energy without carrying matter along with it Wavelength: is the distance between ...
Far Ultraviolet Spectroscopic Explorer
... Core-collapse SNRs (young SNRs from massive stars) Remnants from historical Supernovas in M83 ...
... Core-collapse SNRs (young SNRs from massive stars) Remnants from historical Supernovas in M83 ...
Active Galactic Nuclei
... • Quasars can have up to several 1000 times the luminosity of our Galaxy • The engine powering quasars is only a few light years across or smaller • The only known engine which is powerful enough and compact enough is a black hole • Quasars contain supermassive black holes ...
... • Quasars can have up to several 1000 times the luminosity of our Galaxy • The engine powering quasars is only a few light years across or smaller • The only known engine which is powerful enough and compact enough is a black hole • Quasars contain supermassive black holes ...
Problem Set 2
... ellipse’s semi-major axis. What is the distance d to the supernova? Finally, at its brightest, SN1987A had an apparent magnitude of mV ≈ 3 mag. What was its peak absolute magnitude? Given that the Sun has an absolute magnitude of MV = 4.78 mag in the V band, what was its peak luminosity (in solar u ...
... ellipse’s semi-major axis. What is the distance d to the supernova? Finally, at its brightest, SN1987A had an apparent magnitude of mV ≈ 3 mag. What was its peak absolute magnitude? Given that the Sun has an absolute magnitude of MV = 4.78 mag in the V band, what was its peak luminosity (in solar u ...
a to z of astronomy
... Two stars which are physically close together in space, held together gravitationally, and are orbiting their common centre of mass. They are to be distinguished from double stars which are two stars seen close together in the sky, but may be physically very distant from each other. BLACK BODY An im ...
... Two stars which are physically close together in space, held together gravitationally, and are orbiting their common centre of mass. They are to be distinguished from double stars which are two stars seen close together in the sky, but may be physically very distant from each other. BLACK BODY An im ...
Chapter 1 Our Place in the Universe
... B. Galaxies may exist at that distance, but their light would be too faint for our telescopes to see. ...
... B. Galaxies may exist at that distance, but their light would be too faint for our telescopes to see. ...
Hubble - STScI
... Astronomers using ground-based telescopes to hunt for planets outside our solar system, dubbed extrasolar planets, have nabbed more than 100 alien worlds. But they needed the keen “eye” of Hubble to make the first direct measurement of the chemical makeup of an extrasolar planet's atmosphere. The te ...
... Astronomers using ground-based telescopes to hunt for planets outside our solar system, dubbed extrasolar planets, have nabbed more than 100 alien worlds. But they needed the keen “eye” of Hubble to make the first direct measurement of the chemical makeup of an extrasolar planet's atmosphere. The te ...
Islip Invitational 2013 Astronomy Examination Student
... b. Protostars which are not yet performing fusion do not give off a lot of visible light. c. The size of a newly forming star is typically quite small and thus hard to make out d. Birth happens very quickly, so it is hard to catch stars in the act. e. All of the above are correct. 23. Astronomers st ...
... b. Protostars which are not yet performing fusion do not give off a lot of visible light. c. The size of a newly forming star is typically quite small and thus hard to make out d. Birth happens very quickly, so it is hard to catch stars in the act. e. All of the above are correct. 23. Astronomers st ...
Grade Nine Planetarium script
... h) Cygnus is on the opposite side of Cepheus from Cassiopeia. If you start from the top of Cepheus’ pointy head and draw a line straight down through the middle of his neck (if he had one) and go along this line for another 1.5 fist widths, you come to Deneb, the bright star in Cygnus. 12) The previ ...
... h) Cygnus is on the opposite side of Cepheus from Cassiopeia. If you start from the top of Cepheus’ pointy head and draw a line straight down through the middle of his neck (if he had one) and go along this line for another 1.5 fist widths, you come to Deneb, the bright star in Cygnus. 12) The previ ...
about Stars
... • Astronomers quantify the “color” of a star by using the difference in brightness between the brightness in the B and V spectral regions • The B-V color is related to the slope of the ...
... • Astronomers quantify the “color” of a star by using the difference in brightness between the brightness in the B and V spectral regions • The B-V color is related to the slope of the ...
Talk - Otterbein University
... • Angular size of an object cannot tell us its actual size – depends on how far away it is • Sun and Moon have very nearly the same angular size (30' = ½) when viewed from Earth ...
... • Angular size of an object cannot tell us its actual size – depends on how far away it is • Sun and Moon have very nearly the same angular size (30' = ½) when viewed from Earth ...
Student Worksheet
... WEBSITE: http://cse.ssl.berkeley.edu/segwayed/lessons/classifying_galaxies/student1.htm Your answers to questions below will come from the online lesson: Classifying Galaxies. Start with the "Student Lesson" and the blinking message : "Start Galaxy exploration here" What is a galaxy? 1)_____________ ...
... WEBSITE: http://cse.ssl.berkeley.edu/segwayed/lessons/classifying_galaxies/student1.htm Your answers to questions below will come from the online lesson: Classifying Galaxies. Start with the "Student Lesson" and the blinking message : "Start Galaxy exploration here" What is a galaxy? 1)_____________ ...
Question 1
... b) The rotation of the bulge and disk components c) The Sun’s age and age of the globular cluster stars d) The motion of spiral arms and the mass of the central black hole e) The orbital period and distance from the Galactic center of objects near the edge of the Galaxy Explanation: Use the modified ...
... b) The rotation of the bulge and disk components c) The Sun’s age and age of the globular cluster stars d) The motion of spiral arms and the mass of the central black hole e) The orbital period and distance from the Galactic center of objects near the edge of the Galaxy Explanation: Use the modified ...
Teachers` Manual - Amundsen High School
... A few million ly across - held together by gravity The Local Supercluster - a group of galaxy clusters- held together by gravity ...
... A few million ly across - held together by gravity The Local Supercluster - a group of galaxy clusters- held together by gravity ...
Part II: Ideas in Conflict.
... tight orbits by a black hole. • Doppler shift measurements allow us to calculate the central mass of the galaxy. • M87’s bright nucleus (inset) is only about the size of the solar system and pulls on the nearby stars with so much force that astronomers calculate its mass to be a 3-billion-solar-mass ...
... tight orbits by a black hole. • Doppler shift measurements allow us to calculate the central mass of the galaxy. • M87’s bright nucleus (inset) is only about the size of the solar system and pulls on the nearby stars with so much force that astronomers calculate its mass to be a 3-billion-solar-mass ...
Chapter10 (with interactive links)
... a common center of mass. A less massive star moves faster on a larger orbit. ...
... a common center of mass. A less massive star moves faster on a larger orbit. ...
April 2006 Newsletter PDF - Cowichan Valley Starfinders Society
... explosions which blow huge bubbles of gas above the disk like smoke rising from chimneys. Shock Wave in Stephan's Quintet Galaxy Sun, 05 Mar 2006 - This photograph, taken by the Spitzer space telescope and a ground-based telescope in Spain, shows the Stephan's Quintet galaxy cluster, with one of the ...
... explosions which blow huge bubbles of gas above the disk like smoke rising from chimneys. Shock Wave in Stephan's Quintet Galaxy Sun, 05 Mar 2006 - This photograph, taken by the Spitzer space telescope and a ground-based telescope in Spain, shows the Stephan's Quintet galaxy cluster, with one of the ...
Ch. 25 - UTK Department of Physics and Astronomy
... 25.5 The Universe on Large Scales This appeared at first to be a double quasar, but on closer inspection the two quasars turned out to be not just similar, but identical – down to their ...
... 25.5 The Universe on Large Scales This appeared at first to be a double quasar, but on closer inspection the two quasars turned out to be not just similar, but identical – down to their ...
Toys Watch the Sky - The Sun is a close star
... centre of our Solar System. The Sun is located in an outer spiral arm of the Milky Way Galaxy, approximately 28,000 light-years from the galaxy's centre. (One light year is about 10 million million km.) In comparison with other stars, our Sun is very ordinary – it’s an average sized (1.4 million km ...
... centre of our Solar System. The Sun is located in an outer spiral arm of the Milky Way Galaxy, approximately 28,000 light-years from the galaxy's centre. (One light year is about 10 million million km.) In comparison with other stars, our Sun is very ordinary – it’s an average sized (1.4 million km ...
Basics of Astrophysics
... and the performances of the human eye. Galileo refracting telescope used the eye as detector. Some parts of the spectrum are totally opaque, all the wavelengths shorter than the visible one (UV to γ ...
... and the performances of the human eye. Galileo refracting telescope used the eye as detector. Some parts of the spectrum are totally opaque, all the wavelengths shorter than the visible one (UV to γ ...
H II region
An H II region is a large, low-density cloud of partially ionized gas in which star formation has recently taken place. The short-lived blue stars forged in these regions emit copious amounts of ultraviolet light that ionize the surrounding gas. H II regions—sometimes several hundred light-years across—are often associated with giant molecular clouds. The first known H II region was the Orion Nebula, which was discovered in 1610 by Nicolas-Claude Fabri de Peiresc.H II regions are named for the large amount of ionised atomic hydrogen they contain, referred to as H II, pronounced H-two by astronomers (an H I region being neutral atomic hydrogen, and H2 being molecular hydrogen). Such regions have extremely diverse shapes, because the distribution of the stars and gas inside them is irregular. They often appear clumpy and filamentary, sometimes showing bizarre shapes such as the Horsehead Nebula. H II regions may give birth to thousands of stars over a period of several million years. In the end, supernova explosions and strong stellar winds from the most massive stars in the resulting star cluster will disperse the gases of the H II region, leaving behind a cluster of birthed stars such as the Pleiades.H II regions can be seen to considerable distances in the universe, and the study of extragalactic H II regions is important in determining the distance and chemical composition of other galaxies. Spiral and irregular galaxies contain many H II regions, while elliptical galaxies are almost devoid of them. In the spiral galaxies, including the Milky Way, H II regions are concentrated in the spiral arms, while in the irregular galaxies they are distributed chaotically. Some galaxies contain huge H II regions, which may contain tens of thousands of stars. Examples include the 30 Doradus region in the Large Magellanic Cloud and NGC 604 in the Triangulum Galaxy.