Astronomy Final Study Guide – Name: **This will be the biggest test
... 22. How does the atmosphere protect us from dangerous forms of radiation? Which forms does it protect us from? Be able to draw a diagram explaining how this happens. ...
... 22. How does the atmosphere protect us from dangerous forms of radiation? Which forms does it protect us from? Be able to draw a diagram explaining how this happens. ...
Bright versus Nearby Stars
... • 95% of the brightest stars are more luminous than the Sun. • The average absolute magnitude of a bright star is –1.2, equivalent to 300 solar luminosities. ...
... • 95% of the brightest stars are more luminous than the Sun. • The average absolute magnitude of a bright star is –1.2, equivalent to 300 solar luminosities. ...
spiral galaxies
... will take about 2 billion years to finish, once it’s begun. That means the whole process won’t be completed until about 6 billion years from now — probably long after the sun runs out of fuel and swells to become a bright, cool star known as a red giant. Collisions aren’t that unusual. Small, neighb ...
... will take about 2 billion years to finish, once it’s begun. That means the whole process won’t be completed until about 6 billion years from now — probably long after the sun runs out of fuel and swells to become a bright, cool star known as a red giant. Collisions aren’t that unusual. Small, neighb ...
Hubble Space Telescope Image
... The Universe is filled with these star systems which themselves cluster together into larger systems. Earth & Space Science March 2015 ...
... The Universe is filled with these star systems which themselves cluster together into larger systems. Earth & Space Science March 2015 ...
Review for Astronomy 3 Midterm #2
... -- Neutron stars have a radius of about 10 km, a rotation rate of ~ 1 second on average (they must rotate fast as a result of angular momentum conservation), and very strong magnetic fields Pulsars are young neutron stars that emit radio pulses in very regular, fast intervals. A pulsar can be thou ...
... -- Neutron stars have a radius of about 10 km, a rotation rate of ~ 1 second on average (they must rotate fast as a result of angular momentum conservation), and very strong magnetic fields Pulsars are young neutron stars that emit radio pulses in very regular, fast intervals. A pulsar can be thou ...
The Great Bear and the Little Bear
... • They are much larger than planets and much further from Earth. • The sun is the closest star to Earth. • Most of the gas in the inside of a star is hydrogen and its temperature is over 20 million degrees Fahrenheit. There is also helium, a gas that is formed when the hydrogen molecules join togeth ...
... • They are much larger than planets and much further from Earth. • The sun is the closest star to Earth. • Most of the gas in the inside of a star is hydrogen and its temperature is over 20 million degrees Fahrenheit. There is also helium, a gas that is formed when the hydrogen molecules join togeth ...
Stellar evolution, II
... star in the Large Magellanic Cloud, a satellite galaxy of our Milky Way. Neutrinos from this explosion were detected on the Earth. As the ejecta of the SN plow into the interstellar medium, an expanding ring of shocked gas is observed. ...
... star in the Large Magellanic Cloud, a satellite galaxy of our Milky Way. Neutrinos from this explosion were detected on the Earth. As the ejecta of the SN plow into the interstellar medium, an expanding ring of shocked gas is observed. ...
Galaxies
... This lesson deals with important topics relating to galaxies. Each of these topics represents a great body of knowledge and areas of interest to research. Historically, galaxies were called nebulae meaning clouds and only later was it realised that they were vast collections of stars, gas and dust l ...
... This lesson deals with important topics relating to galaxies. Each of these topics represents a great body of knowledge and areas of interest to research. Historically, galaxies were called nebulae meaning clouds and only later was it realised that they were vast collections of stars, gas and dust l ...
The Milky Way - Montgomery College
... Measuring the Mass of the Black Hole in the Center of the Milky Way By following the orbits of individual stars near the center of the Milky Way, the mass of the central black hole could be determined to be ~ 2.6 million ...
... Measuring the Mass of the Black Hole in the Center of the Milky Way By following the orbits of individual stars near the center of the Milky Way, the mass of the central black hole could be determined to be ~ 2.6 million ...
Star and Galaxies Chapter 13
... • Hydrogen fuses together to form Helium with great release of energy. • It releases electromagnetic energy in the form of light, infrared, and ultraviolet light. Tiny fraction of light reaches earth • During fusion, 4 Hydrogen atoms fuse to form Helium where small amount of mass is lost to energy i ...
... • Hydrogen fuses together to form Helium with great release of energy. • It releases electromagnetic energy in the form of light, infrared, and ultraviolet light. Tiny fraction of light reaches earth • During fusion, 4 Hydrogen atoms fuse to form Helium where small amount of mass is lost to energy i ...
Star and Galaxies Chapter 13 2013
... • Hydrogen fuses together to form Helium with great release of energy. • It releases electromagnetic energy in the form of light, infrared, and ultraviolet light. Tiny fraction of light reaches earth • During fusion, 4 Hydrogen atoms fuse to form Helium where small amount of mass is lost to energy i ...
... • Hydrogen fuses together to form Helium with great release of energy. • It releases electromagnetic energy in the form of light, infrared, and ultraviolet light. Tiny fraction of light reaches earth • During fusion, 4 Hydrogen atoms fuse to form Helium where small amount of mass is lost to energy i ...
Model of Stars—5 Oct Outline •
... You want to measure the distance of a star at right ascension 0hr. When are two times of the year between which the change in the parallactic angle is the greatest? A. B. C. D. ...
... You want to measure the distance of a star at right ascension 0hr. When are two times of the year between which the change in the parallactic angle is the greatest? A. B. C. D. ...
Linking Asteroids and Meteorites through Reflectance
... We can measure how spectral features at known wavelengths Change wavelength positions and determine how fast a star or galaxy is moving away from us ...
... We can measure how spectral features at known wavelengths Change wavelength positions and determine how fast a star or galaxy is moving away from us ...
The H-R Diagram
... other lines. Called them “F stars” • Yellow stars, with prominent double line in the yellow part of spectrum. Called them “G stars”. • Orange stars, with very weak H lines and tons of other lines. Skip some more letters and call them “K stars”. • Red stars, with no H lines, tons of lines, even big t ...
... other lines. Called them “F stars” • Yellow stars, with prominent double line in the yellow part of spectrum. Called them “G stars”. • Orange stars, with very weak H lines and tons of other lines. Skip some more letters and call them “K stars”. • Red stars, with no H lines, tons of lines, even big t ...
Today`s Powerpoint
... Luminosity = (energy radiated per cm2 per sec) x (area of surface in cm2) So: Luminosity (temperature) 4 x (surface area) Determine luminosity from apparent brightness and distance, determine temperature from spectrum (black-body curve or spectral lines), then find surface area, then find radius ( ...
... Luminosity = (energy radiated per cm2 per sec) x (area of surface in cm2) So: Luminosity (temperature) 4 x (surface area) Determine luminosity from apparent brightness and distance, determine temperature from spectrum (black-body curve or spectral lines), then find surface area, then find radius ( ...
14.5 Yellow Giants and Pulsating Stars Variable Stars Not all stars
... A covered pan of water boiling on a stove behaves similarly. The lid will trap the steam so that pressure inside rises. Eventually, the pressure becomes strong enough to tip the lid, and steam escapes. The pressure decreases, and the lid falls back. It again traps the steam, the pressure again build ...
... A covered pan of water boiling on a stove behaves similarly. The lid will trap the steam so that pressure inside rises. Eventually, the pressure becomes strong enough to tip the lid, and steam escapes. The pressure decreases, and the lid falls back. It again traps the steam, the pressure again build ...
EMR, Telescopes, Stars, Solar System study guide `14-15
... • Know that electromagnetic radiation (EMR) travels in waves. • Know the meaning of wavelength. • Know that white light is the mixture of all the colors in the visible spectrum. • Know the colors of the spectrum of visible light and the relative wavelengths of them (red long to violet short) and ene ...
... • Know that electromagnetic radiation (EMR) travels in waves. • Know the meaning of wavelength. • Know that white light is the mixture of all the colors in the visible spectrum. • Know the colors of the spectrum of visible light and the relative wavelengths of them (red long to violet short) and ene ...
Measurements of Dark Energy Lecture 2: Expansion Kinematics
... We are now very good at measuring extragalactic distances: WMAP5+BAO+SNall samples, compute luminosity distance to redshift z for each one, take standard deviation to get error(z): Other uncertainties (photometric calibration, K-corrections, extinction etc) likely to outweigh this Dark energy is alr ...
... We are now very good at measuring extragalactic distances: WMAP5+BAO+SNall samples, compute luminosity distance to redshift z for each one, take standard deviation to get error(z): Other uncertainties (photometric calibration, K-corrections, extinction etc) likely to outweigh this Dark energy is alr ...
Question Sheet 1 - EPS Personal home pages
... Suppose a car is travelling at 17.8 ms-1 and the driver sees a traffic light turn red. After 0.510 s has elapsed (the reaction time), the driver applies the brakes, and the car accelerates at -6.20 ms-2. What is the stopping distance of the car, as measured from the point where the driver first noti ...
... Suppose a car is travelling at 17.8 ms-1 and the driver sees a traffic light turn red. After 0.510 s has elapsed (the reaction time), the driver applies the brakes, and the car accelerates at -6.20 ms-2. What is the stopping distance of the car, as measured from the point where the driver first noti ...
Jets in the DR21/W75N Star Forming Region
... H2 only modest velocities of ~10-30 km/s are recorded in the blue- and red-shifted lobes of outflows. The median H2 flow velocity is therefore a useful measure of the kinematic distance, while at the same time, the small velocity shifts are sufficient to allow identification of the jet and counter-j ...
... H2 only modest velocities of ~10-30 km/s are recorded in the blue- and red-shifted lobes of outflows. The median H2 flow velocity is therefore a useful measure of the kinematic distance, while at the same time, the small velocity shifts are sufficient to allow identification of the jet and counter-j ...
Explore the Galaxy - Museum of Science, Boston
... were broadcast in the mid-1930s, and all subsequent signals will continue to extend out into space at the speed of light. Because they have traveled much faster and farther than any spacecraft, these radio transmissions mark the farthest influence of humanity in the Galaxy. The current radius of the ...
... were broadcast in the mid-1930s, and all subsequent signals will continue to extend out into space at the speed of light. Because they have traveled much faster and farther than any spacecraft, these radio transmissions mark the farthest influence of humanity in the Galaxy. The current radius of the ...
Cosmic distance ladder
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A real direct distance measurement of an astronomical object is possible only for those objects that are ""close enough"" (within about a thousand parsecs) to Earth. The techniques for determining distances to more distant objects are all based on various measured correlations between methods that work at close distances and methods that work at larger distances. Several methods rely on a standard candle, which is an astronomical object that has a known luminosity.The ladder analogy arises because no one technique can measure distances at all ranges encountered in astronomy. Instead, one method can be used to measure nearby distances, a second can be used to measure nearby to intermediate distances, and so on. Each rung of the ladder provides information that can be used to determine the distances at the next higher rung.