chap18_s05_probs
... = 0.0019 kilograms or 1.9 grams (!) A very small mass. PROBLEM 18-10: To ionize interstellar hydrogen, a photon must have a wavelength smaller than 91.2 nanometers (9.12 10-8 m). Assuming a star had its peak wavelength at this value, what is the surface temperature of this star ? ANSWER: Use Wie ...
... = 0.0019 kilograms or 1.9 grams (!) A very small mass. PROBLEM 18-10: To ionize interstellar hydrogen, a photon must have a wavelength smaller than 91.2 nanometers (9.12 10-8 m). Assuming a star had its peak wavelength at this value, what is the surface temperature of this star ? ANSWER: Use Wie ...
Merak
... How Far Away: 62 light years away How Bright: About 50 times brighter than the Sun Where to View: In the constellation Ursa Major. When to View:All year round in the Northern Hemisphere ...
... How Far Away: 62 light years away How Bright: About 50 times brighter than the Sun Where to View: In the constellation Ursa Major. When to View:All year round in the Northern Hemisphere ...
Dead Stars - University of Iowa Astrophysics
... “Most stars end their lives as white dwarfs. These glowing embers scattered throughout space are a galaxy’s memory of its past glory. Because no fusion occurs in their interiors, white dwarfs simply cool off at an essentially constant radius as they slowly deplete their supply of thermal energy”…Car ...
... “Most stars end their lives as white dwarfs. These glowing embers scattered throughout space are a galaxy’s memory of its past glory. Because no fusion occurs in their interiors, white dwarfs simply cool off at an essentially constant radius as they slowly deplete their supply of thermal energy”…Car ...
Dead Stars They do exist! The white dwarf stars
... “Most stars end their lives as white dwarfs. These glowing embers scattered throughout space are a galaxy’s memory of its past glory. Because no fusion occurs in their interiors, white dwarfs simply cool off at an essentially constant radius as they slowly deplete their supply of thermal energy”…Car ...
... “Most stars end their lives as white dwarfs. These glowing embers scattered throughout space are a galaxy’s memory of its past glory. Because no fusion occurs in their interiors, white dwarfs simply cool off at an essentially constant radius as they slowly deplete their supply of thermal energy”…Car ...
Explore the Galaxy - Museum of Science
... Black Hole- A region of sp ace w here m ass is so highly concentrated that the gravitational p u ll becom es incred ibly strong. Within a certain d istance from the black hole, called the event horizon, nothing, not even light, is fast enou gh to escap e the gravitational p u ll. Stellar black holes ...
... Black Hole- A region of sp ace w here m ass is so highly concentrated that the gravitational p u ll becom es incred ibly strong. Within a certain d istance from the black hole, called the event horizon, nothing, not even light, is fast enou gh to escap e the gravitational p u ll. Stellar black holes ...
The solar system - Secondary Education
... • Though there are just three dwarf planets now, their number is expected to grow. Scientists estimate there may be 70 dwarf planets amongst outer solar system objects that have been discovered already. Since we don't know the actual sizes or shapes of many of the objects we've found (because they ...
... • Though there are just three dwarf planets now, their number is expected to grow. Scientists estimate there may be 70 dwarf planets amongst outer solar system objects that have been discovered already. Since we don't know the actual sizes or shapes of many of the objects we've found (because they ...
Home | STA Notes
... Distant galaxies etc emit electromagnetic radiation that is of greater wavelength (lower frequency) than would be observed from the same elements on earth. i.e. Patterns of spectral lines are shifted towards the red end of the visible spectrum. This phenomenon is known as redshift. Redshift is remin ...
... Distant galaxies etc emit electromagnetic radiation that is of greater wavelength (lower frequency) than would be observed from the same elements on earth. i.e. Patterns of spectral lines are shifted towards the red end of the visible spectrum. This phenomenon is known as redshift. Redshift is remin ...
L34
... classical explanation • According to classical physics, if the intensity of the light is strong enough, enough energy should be absorbed by the electrons to make them pop out • The wavelength of the light should not make a difference. ...
... classical explanation • According to classical physics, if the intensity of the light is strong enough, enough energy should be absorbed by the electrons to make them pop out • The wavelength of the light should not make a difference. ...
![L 35 Modern Physics [1]](http://s1.studyres.com/store/data/001689016_1-3e506855e2f70cb00e132a79d00855e2-300x300.png)
Problem Set #3
... a. Is your galaxy in solid body rotation? How do you know? b. What is the local rotation speed at your position? c. Is the rotation curve locally flat? How do you know? d. What is the mass of the Galaxy contained within R0? e. Do you think this Galaxy is likely to be more or less massive than the Mi ...
... a. Is your galaxy in solid body rotation? How do you know? b. What is the local rotation speed at your position? c. Is the rotation curve locally flat? How do you know? d. What is the mass of the Galaxy contained within R0? e. Do you think this Galaxy is likely to be more or less massive than the Mi ...
observational requirements, feasability, expectations
... Activity time scale with COROT (visible light) : spots lifetime combined with rotation period (solar case not so simple; instrumental low frequency noise) No real law, even empirical, to estimate the activity time scale exploratory approach based on many stars and comparison to their rotation peri ...
... Activity time scale with COROT (visible light) : spots lifetime combined with rotation period (solar case not so simple; instrumental low frequency noise) No real law, even empirical, to estimate the activity time scale exploratory approach based on many stars and comparison to their rotation peri ...
Incandescence Light bulb has a wire filament (tungsten) that is
... atoms to emit UV light. The UV light is absorbed by the fluorescent materials that coat the tube and excites them, which makes them re-emit visible light. Neon light has glass tubes filled with a gas like neon, argon or krypton at low pressure. At both ends of the tube there are metal electrodes. Wh ...
... atoms to emit UV light. The UV light is absorbed by the fluorescent materials that coat the tube and excites them, which makes them re-emit visible light. Neon light has glass tubes filled with a gas like neon, argon or krypton at low pressure. At both ends of the tube there are metal electrodes. Wh ...
Protogalaxies Encyclopedia of Astronomy & Astrophysics eaa.iop.org S G Djorgovski
... motions. Thus, any disk galaxy is unlikely to have had a major merger since its disk was formed, but accretion of smaller satellites is still possible. Conversely, one often hears assertions that (some) ellipticals are made by merging spirals, which is indeed observed in the nearby universe. Obvious ...
... motions. Thus, any disk galaxy is unlikely to have had a major merger since its disk was formed, but accretion of smaller satellites is still possible. Conversely, one often hears assertions that (some) ellipticals are made by merging spirals, which is indeed observed in the nearby universe. Obvious ...
A105 Stars and Galaxies - Indiana University Astronomy
... PHOTON ERA - energy in the form of electromagnetic radiation dominates the Universe - visible light, X rays, radio waves and ultraviolet rays. Energy transforms into matter: • quarks • the first nuclei: protons, neutrons,helium •The density of energy was so great that matter could not exist. • As t ...
... PHOTON ERA - energy in the form of electromagnetic radiation dominates the Universe - visible light, X rays, radio waves and ultraviolet rays. Energy transforms into matter: • quarks • the first nuclei: protons, neutrons,helium •The density of energy was so great that matter could not exist. • As t ...
Name
... Use Chart, Set Date and Time. Where were you born? ____________________ Use Chart, Set Location. As seen from the earth, which constellation was the sun in front of? _____________________. Adjust the scroll bars to get as many planets as possible in the field of view with the sun. Put on the constel ...
... Use Chart, Set Date and Time. Where were you born? ____________________ Use Chart, Set Location. As seen from the earth, which constellation was the sun in front of? _____________________. Adjust the scroll bars to get as many planets as possible in the field of view with the sun. Put on the constel ...
Binary Orbits
... B. One is large enough to block the other C. The inclination angle is close to 90 Stars are so close that thay cannot be distinguished, but detected due to reduction of light. ...
... B. One is large enough to block the other C. The inclination angle is close to 90 Stars are so close that thay cannot be distinguished, but detected due to reduction of light. ...
Lecture 12, PPT version
... • Will all the material in the Milky Way eventually be sucked into the BH at the center? • Does the star that “gives up” mass to a BH eventually get pulled in to the BH? Star properties: ...
... • Will all the material in the Milky Way eventually be sucked into the BH at the center? • Does the star that “gives up” mass to a BH eventually get pulled in to the BH? Star properties: ...
Circular Polarization in Star- Formation Regions
... type that would be expected to be a source of ultraviolet (UV) light, the Crab Nebula and its pulsar, shows no CP either in the nebula (10) or in the pulsar (11), nor is any expected from synchrotron radiation under these conditions (12). Furthermore, the flat power law spectrum of such a source wil ...
... type that would be expected to be a source of ultraviolet (UV) light, the Crab Nebula and its pulsar, shows no CP either in the nebula (10) or in the pulsar (11), nor is any expected from synchrotron radiation under these conditions (12). Furthermore, the flat power law spectrum of such a source wil ...
ASTR 001 Introduction to the Cosmos
... A) The cosmic background radiation is expected to have a temperature just a few degrees above absolute zero, and its actual temperature turns out to be about 3 K (actually 2.7 K). B) The cosmic background radiation is expected to have a blackbody(continuous) spectrum, and observations from the COBE ...
... A) The cosmic background radiation is expected to have a temperature just a few degrees above absolute zero, and its actual temperature turns out to be about 3 K (actually 2.7 K). B) The cosmic background radiation is expected to have a blackbody(continuous) spectrum, and observations from the COBE ...
Practice Exam 4 - BYU Physics and Astronomy
... the frame of reference of the Zorgites? 2. (a) Scientists study the spectral lines absorbed by gases from a distant galaxy. If monatomic hydrogen is present, what wavelength would you expect to be absorbed for an n=2 to n=3 transition in the rest frame of the galaxy? (b) The spectral line is Doppler ...
... the frame of reference of the Zorgites? 2. (a) Scientists study the spectral lines absorbed by gases from a distant galaxy. If monatomic hydrogen is present, what wavelength would you expect to be absorbed for an n=2 to n=3 transition in the rest frame of the galaxy? (b) The spectral line is Doppler ...
Astronomical spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, which radiates from stars and other hot celestial objects. Spectroscopy can be used to derive many properties of distant stars and galaxies, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.