Light from stars part II
... passing through a cool, low density gas 3) Emission spectrum: result of a low density gas excited to emit light. The Light is emitted at specific wavelengths ...
... passing through a cool, low density gas 3) Emission spectrum: result of a low density gas excited to emit light. The Light is emitted at specific wavelengths ...
Astronomy HOMEWORK Chapter 4 - University of San Diego Home
... I gave the same formula in class, but with the constant being 2.93 × 106 , and remarking that the wavelength must be in nm. Doing it this way: T = (2.93 × 106 )/λmax = 2.93 × 106 /445 = 6580 K. The same final answer, of course. 19. In the spectrum of the bright star Rigel, Hα is observed to have a w ...
... I gave the same formula in class, but with the constant being 2.93 × 106 , and remarking that the wavelength must be in nm. Doing it this way: T = (2.93 × 106 )/λmax = 2.93 × 106 /445 = 6580 K. The same final answer, of course. 19. In the spectrum of the bright star Rigel, Hα is observed to have a w ...
Quiz 1: Answers Physics 55: Introduction to
... the Sun and elsewhere in our solar system came from stars that existed before our Sun, that fused hydrogen into more massive elements and then “died,” usually violently is such a way that the star’s contents were blown out into space, to become part of another star system. 3. Galaxies are important ...
... the Sun and elsewhere in our solar system came from stars that existed before our Sun, that fused hydrogen into more massive elements and then “died,” usually violently is such a way that the star’s contents were blown out into space, to become part of another star system. 3. Galaxies are important ...
The Universe
... Different elements absorb different wavelengths of light. Thus removing them from the spectrum. The blank spaces (absorption lines) in the spectrum below represent different elements in that star ...
... Different elements absorb different wavelengths of light. Thus removing them from the spectrum. The blank spaces (absorption lines) in the spectrum below represent different elements in that star ...
Today`s Class: Measuring temperatures of stars Astronomer`s
... c) A star with spectral type A is cooler than a star with spectral type B. d) All of the above are true. ...
... c) A star with spectral type A is cooler than a star with spectral type B. d) All of the above are true. ...
spiral galaxies
... 5 trillion stars! There is very little free gas in an elliptical galaxy. Therefore, few new stars form there. IRREGULAR GALAXIES An irregular galaxy has no clear shape. It may have as few as 10 million or as many as several billion stars. Some irregular galaxies form when two other galaxies collide. ...
... 5 trillion stars! There is very little free gas in an elliptical galaxy. Therefore, few new stars form there. IRREGULAR GALAXIES An irregular galaxy has no clear shape. It may have as few as 10 million or as many as several billion stars. Some irregular galaxies form when two other galaxies collide. ...
MULTIPLE CHOICE. Choose the one alternative that best
... 7) What is the likely reason that we cannot find any examples of the first generation stars? A) The first generation stars are too faint to be visible now. B) The first generation stars formed with only H and He and therefore have no spectral features. C) The first generation stars formed such a lon ...
... 7) What is the likely reason that we cannot find any examples of the first generation stars? A) The first generation stars are too faint to be visible now. B) The first generation stars formed with only H and He and therefore have no spectral features. C) The first generation stars formed such a lon ...
Solar Nebula Theory
... 1. All planets orbit the Sun in the same direction as the Sun’s rotation 2. All planetary orbits are confined to the same general plane 3. Terrestrial planets form near the Sun, Jovian planets further out ...
... 1. All planets orbit the Sun in the same direction as the Sun’s rotation 2. All planetary orbits are confined to the same general plane 3. Terrestrial planets form near the Sun, Jovian planets further out ...
Announcements
... jumps up to a higher level, or when an electron in a higher level emits a photon and jumps down to the 2nd level. ...
... jumps up to a higher level, or when an electron in a higher level emits a photon and jumps down to the 2nd level. ...
Stars - Lauer Science
... itself! There is so much energy during the explosion that iron atoms can be forced together to form larger atoms. ...
... itself! There is so much energy during the explosion that iron atoms can be forced together to form larger atoms. ...
Lifecycle of a Star
... A white dwarf cools off over trillions of years until it no longer emits light ...
... A white dwarf cools off over trillions of years until it no longer emits light ...
The Stars - Department of Physics and Astronomy
... • Hydrogen fusion takes place in a core extending from the Sun’s center to about 0.25 solar radius • The core is surrounded by a radiative zone extending to about 0.71 solar radius – In this zone, energy travels outward through radiative diffusion ...
... • Hydrogen fusion takes place in a core extending from the Sun’s center to about 0.25 solar radius • The core is surrounded by a radiative zone extending to about 0.71 solar radius – In this zone, energy travels outward through radiative diffusion ...
The Hertzsprung-Russell Diagram
... Our sun is a main sequence star, as are many stars close to our solar system in our galaxy. Other stars, however, have characteristics that place them in other groups on the chart. Stars that are cool but very luminous must be very large. These we call red giants or super giants. Finally, there are ...
... Our sun is a main sequence star, as are many stars close to our solar system in our galaxy. Other stars, however, have characteristics that place them in other groups on the chart. Stars that are cool but very luminous must be very large. These we call red giants or super giants. Finally, there are ...
How many planets are there in our solar system
... a. The first man to step on the moon b. A scientist who developed a theory on the creation of our solar system c. The first woman to go into space d. He developed the theory of Red Shift 19. Write two facts about our moon. (2 pts) ...
... a. The first man to step on the moon b. A scientist who developed a theory on the creation of our solar system c. The first woman to go into space d. He developed the theory of Red Shift 19. Write two facts about our moon. (2 pts) ...
Stars, Galaxies, and the Universe
... Radio Telescopes: Detect radio waves from objects in space. Observatory: A building that contains one or more telescopes. ...
... Radio Telescopes: Detect radio waves from objects in space. Observatory: A building that contains one or more telescopes. ...
Star Lifecycle
... A star is a really hot ball of gas, with hydrogen fusing into helium at its core. Stars produce light energy, heat energy, and electromagnetic waves. Stars spend the majority of their lives fusing hydrogen, and when the hydrogen fuel is gone, stars fuse helium into carbon. The more massive s ...
... A star is a really hot ball of gas, with hydrogen fusing into helium at its core. Stars produce light energy, heat energy, and electromagnetic waves. Stars spend the majority of their lives fusing hydrogen, and when the hydrogen fuel is gone, stars fuse helium into carbon. The more massive s ...
ppp
... • Number of stars per galaxy can vary • Galaxy masses vary • Simulation of different celestial objects (quasars, black holes, etc) ...
... • Number of stars per galaxy can vary • Galaxy masses vary • Simulation of different celestial objects (quasars, black holes, etc) ...
Tools of Modern Astronomy Slide Show
... spectrum! 8. There are 2 types of visible light telescopes: __________ & _____________. Refracting telescopes focus light through a objective _____________ lens onto an eyepiece. Reflecting telescopes focus light onto a __________ onto an eyepiece. 9. The Earth’s _______________ distorts EM radiatio ...
... spectrum! 8. There are 2 types of visible light telescopes: __________ & _____________. Refracting telescopes focus light through a objective _____________ lens onto an eyepiece. Reflecting telescopes focus light onto a __________ onto an eyepiece. 9. The Earth’s _______________ distorts EM radiatio ...
Stars
... Life span of a star depends on its size and mass. – Very large, massive stars burn their fuel much faster than smaller stars – Their main sequence may last only a few hundred thousand years – Smaller stars will live on for billions of years because they burn their fuel much more slowly ...
... Life span of a star depends on its size and mass. – Very large, massive stars burn their fuel much faster than smaller stars – Their main sequence may last only a few hundred thousand years – Smaller stars will live on for billions of years because they burn their fuel much more slowly ...
PH607lec11
... regions, or is produced by energetic electrons moving in magnetic fields Near Infrared: Most of the emission at these wavelengths is from relatively cool giant K stars in the disk and bulge X-rays: extended soft X-ray emission is detected from hot, shocked gas. At the lower energies especially, the ...
... regions, or is produced by energetic electrons moving in magnetic fields Near Infrared: Most of the emission at these wavelengths is from relatively cool giant K stars in the disk and bulge X-rays: extended soft X-ray emission is detected from hot, shocked gas. At the lower energies especially, the ...
PoA Examples Sheet 3
... an external radiation field can be neglected, what is the fraction of the line emitting species in the upper level? Explain how this distribution is established. If the cloud is optically thin to the line radiation, estimate the luminosity in this line emitted by the entire cloud. ii) The cloud is c ...
... an external radiation field can be neglected, what is the fraction of the line emitting species in the upper level? Explain how this distribution is established. If the cloud is optically thin to the line radiation, estimate the luminosity in this line emitted by the entire cloud. ii) The cloud is c ...
Exploring the Universe
... a. Red shift, and cosmic background radiation b. Cosmic background radiation: steady, but very dim signals in the form of microwaves that are emitted all over the sky i. Scientists believe that these microwaves are the remains of the radiation produced during the Big Bang ...
... a. Red shift, and cosmic background radiation b. Cosmic background radiation: steady, but very dim signals in the form of microwaves that are emitted all over the sky i. Scientists believe that these microwaves are the remains of the radiation produced during the Big Bang ...
Linking Asteroids and Meteorites through Reflectance Spectroscopy
... • She proposed that most stars were made up of Hydrogen and Helium • Her 1925 PhD Harvard thesis on these topics was voted best Astronomy thesis of the 20th century ...
... • She proposed that most stars were made up of Hydrogen and Helium • Her 1925 PhD Harvard thesis on these topics was voted best Astronomy thesis of the 20th century ...
Astronomy 1
... Solar System, and of Earth. It is agreed that the Milky Way is a spiral galaxy, with observations suggesting that it is a barred spiral galaxy. It contains 100-400 billion stars and an estimated 50 billion planets, 500 million of which could be located in the habitable zone of their parent star. The ...
... Solar System, and of Earth. It is agreed that the Milky Way is a spiral galaxy, with observations suggesting that it is a barred spiral galaxy. It contains 100-400 billion stars and an estimated 50 billion planets, 500 million of which could be located in the habitable zone of their parent star. The ...
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.