1 milles million 93 km810 1.496 1AU = × = 63,240AU ly1 km 12 10
... The parsec (abbreviated pc) is related to the method of measuring distances to the starts. Imaging taking a journey far into space, beyond the orbits of the outer planets. As you look back toward the Sun, the Earth’s orbit subtends a smaller angle in the sky the farther you are from the Sun. The dis ...
... The parsec (abbreviated pc) is related to the method of measuring distances to the starts. Imaging taking a journey far into space, beyond the orbits of the outer planets. As you look back toward the Sun, the Earth’s orbit subtends a smaller angle in the sky the farther you are from the Sun. The dis ...
Review for Astronomy Exam 1
... the Universe is made of Water Heraclitus: the Universe is made of Fire Empedocles: the Universe is made of Water, Air, Fire, Earth Aristotle: the Universe has 8 crystalline spheres (Moon, Mercury, Venus, Sun, Mars, Jupiter, Saturn, Stars) he added a fifth element “quintessence” to his cosmological s ...
... the Universe is made of Water Heraclitus: the Universe is made of Fire Empedocles: the Universe is made of Water, Air, Fire, Earth Aristotle: the Universe has 8 crystalline spheres (Moon, Mercury, Venus, Sun, Mars, Jupiter, Saturn, Stars) he added a fifth element “quintessence” to his cosmological s ...
class17
... A. It would be only 1/3 as bright. B. It would be only 1/6 as bright. C. It would be only 1/9 as bright. D. It would be three times brighter. ...
... A. It would be only 1/3 as bright. B. It would be only 1/6 as bright. C. It would be only 1/9 as bright. D. It would be three times brighter. ...
Astronomy 162 Lab 4: Stars
... Magnitude on the y-axis. From this diagram, astronomers can study the relationship between temperature and brightness. This relationship leads to some important observations. Firstly, the diagram is divided into three groups: Giants and Super Giants at the top, a long line of Main Sequence stars in ...
... Magnitude on the y-axis. From this diagram, astronomers can study the relationship between temperature and brightness. This relationship leads to some important observations. Firstly, the diagram is divided into three groups: Giants and Super Giants at the top, a long line of Main Sequence stars in ...
1. a. Collisionless Boltzmann—particles moving in smooth potential
... to make V0 depressingly uncertain so you will see a variety of values used in the literature. b. We can derive V(R) for R
... to make V0 depressingly uncertain so you will see a variety of values used in the literature. b. We can derive V(R) for R
Name: Period: ______ Date: 1/16/07
... kilometers from Earth. Such a large number is difficult to understand and use in calculations. For this reason, astronomers use a different unit of measurement when they talk about distances between stars. ...
... kilometers from Earth. Such a large number is difficult to understand and use in calculations. For this reason, astronomers use a different unit of measurement when they talk about distances between stars. ...
EM review
... Measuring the brightness of stars (and NEAS) The observed brightness of a star is given by its apparent magnitude. (First devised by Hipparchus who made a catalogue of about 850) The brightest stars: m=1. Dimmest stars (visible to the naked eye) m=6. The magnitude scale has been shown to be loga ...
... Measuring the brightness of stars (and NEAS) The observed brightness of a star is given by its apparent magnitude. (First devised by Hipparchus who made a catalogue of about 850) The brightest stars: m=1. Dimmest stars (visible to the naked eye) m=6. The magnitude scale has been shown to be loga ...
20081 Study Guide_77-120
... observer could still infer that two skaters were present by observing the effect the invisible skater would have on the motion of the visible skater. Similarly, astronomers detect black holes by their gravitational effects on nearby stars, gas, or dust. ...
... observer could still infer that two skaters were present by observing the effect the invisible skater would have on the motion of the visible skater. Similarly, astronomers detect black holes by their gravitational effects on nearby stars, gas, or dust. ...
Discussion Activity #13
... A. Theoretical models of galaxy formation suggest that a galaxy cannot form unless it has at least 10 times as much matter as we see in the Milky Way disk, suggesting that the halo is full of dark matter. B. The orbital speeds of stars far from the galactic center are surprisingly high, suggesting t ...
... A. Theoretical models of galaxy formation suggest that a galaxy cannot form unless it has at least 10 times as much matter as we see in the Milky Way disk, suggesting that the halo is full of dark matter. B. The orbital speeds of stars far from the galactic center are surprisingly high, suggesting t ...
Name ______KEY Date Core ______ Study Guide Galaxies and the
... When did the Big Bang happen and what has happened since? The big bang theory is theorized to have happened 14 billion years ago when the universe suddenly began to expand from one merged mass of matter or substance. At that time, all matter was dense and hot and the universe developed in less than ...
... When did the Big Bang happen and what has happened since? The big bang theory is theorized to have happened 14 billion years ago when the universe suddenly began to expand from one merged mass of matter or substance. At that time, all matter was dense and hot and the universe developed in less than ...
parallax
... experiment above. How does the parallax (the apparent shift of the position of your finger) change as your finger is moved closer to your ...
... experiment above. How does the parallax (the apparent shift of the position of your finger) change as your finger is moved closer to your ...
PARALLAX EXERCISE1 The goal of this exercise is to introduce the
... experiment above. How does the parallax (the apparent shift of the position of your finger) change as your finger is moved closer to your ...
... experiment above. How does the parallax (the apparent shift of the position of your finger) change as your finger is moved closer to your ...
Stars and Galaxies
... over time. The mass of a star controls its Evolution Lifespan Ultimate fate (how it dies) ...
... over time. The mass of a star controls its Evolution Lifespan Ultimate fate (how it dies) ...
Announcements
... • Mid-Term 2: Wednesday March 24 Light, Planets, Sun, Observations of stars Chapters 6.4-5, 8-11, 15, 16.1-4 ...
... • Mid-Term 2: Wednesday March 24 Light, Planets, Sun, Observations of stars Chapters 6.4-5, 8-11, 15, 16.1-4 ...
Ages of Star Clusters - Indiana University Astronomy
... Hotter stars are brighter in blue light than in yellow light, have low values of B-V color, and are found on the left side of the diagram. Cooler stars are brighter in yellow light than in blue light, have larger values of B-V color, and are found on the right side of the diagram. ...
... Hotter stars are brighter in blue light than in yellow light, have low values of B-V color, and are found on the left side of the diagram. Cooler stars are brighter in yellow light than in blue light, have larger values of B-V color, and are found on the right side of the diagram. ...
pdf format
... • If we were to measure the velocities of more distant parts of the Milky Way and we find that they are moving faster than the Sun, so that their orbital periods are all about the same as the Sun, what does this tell us about the total mass of the Galaxy? Hint in the solar system the more distant pl ...
... • If we were to measure the velocities of more distant parts of the Milky Way and we find that they are moving faster than the Sun, so that their orbital periods are all about the same as the Sun, what does this tell us about the total mass of the Galaxy? Hint in the solar system the more distant pl ...
molecular clouds
... The Interstellar Medium • Today stars form in a complex environment • Hydrogen and helium are the predominant components of the ISM, but it is enriched with heavier elements from earlier stars (created in stellar fusion and supernova explosions). ...
... The Interstellar Medium • Today stars form in a complex environment • Hydrogen and helium are the predominant components of the ISM, but it is enriched with heavier elements from earlier stars (created in stellar fusion and supernova explosions). ...
The Stars
... Absolute magnitudes (M): pegged to luminosity M is the magnitude you would see at a distance of ...
... Absolute magnitudes (M): pegged to luminosity M is the magnitude you would see at a distance of ...
Physics 1025: Lecture 17 Sun (cont.), Stellar Distances, Parallax
... astronomical questions is the distance to the stars; every class from now on will introduce at least one means for this determination – astronomers are very clever in finding indirect means, since there is only one direct method and the stars are very far away. Parallax is the only direct way to mea ...
... astronomical questions is the distance to the stars; every class from now on will introduce at least one means for this determination – astronomers are very clever in finding indirect means, since there is only one direct method and the stars are very far away. Parallax is the only direct way to mea ...
Determination of the distance to the Andromeda Galaxy using variable stars U
... derived from different methods (Gibson, 2000). Therefore, accurate distance measurements to other Local Group galaxies are crucial to calibrating the cosmic distance scale. Once Local Group galaxy distances are known, all of its various stellar populations are available as potential standard candles. ...
... derived from different methods (Gibson, 2000). Therefore, accurate distance measurements to other Local Group galaxies are crucial to calibrating the cosmic distance scale. Once Local Group galaxy distances are known, all of its various stellar populations are available as potential standard candles. ...
solutions
... relationship between absolute magnitude, luminosity, classification, and effective temperature of stars. The diagram was proposed by Ejnar Hertzsprung and Henry Norris Russell in 1910. There are several forms of the Hertzsprung-Russell diagram. The original diagram displayed the spectral type of sta ...
... relationship between absolute magnitude, luminosity, classification, and effective temperature of stars. The diagram was proposed by Ejnar Hertzsprung and Henry Norris Russell in 1910. There are several forms of the Hertzsprung-Russell diagram. The original diagram displayed the spectral type of sta ...
Post-class version
... – In this way, estimate distance to a galaxy even when you know nothing about it other than its radial velocity. ...
... – In this way, estimate distance to a galaxy even when you know nothing about it other than its radial velocity. ...
Dec 2017 - What`s Out Tonight?
... tens of thousands stars held together by their mutual gravity. All Galilean moons and cloud bands, easily visible at 50x. It is posof the globulars that can be seen in the sky are part of our Milky sible to see the moons with well-focused binoculars. Saturn is Way Galaxy, and there are about 200 of ...
... tens of thousands stars held together by their mutual gravity. All Galilean moons and cloud bands, easily visible at 50x. It is posof the globulars that can be seen in the sky are part of our Milky sible to see the moons with well-focused binoculars. Saturn is Way Galaxy, and there are about 200 of ...
Section 19.3
... Figuring out the distance between galaxies is one of the more difficult tasks in astronomy. A faint object in the night sky could be a dim object that is relatively nearby or a bright object that is far, far away. ...
... Figuring out the distance between galaxies is one of the more difficult tasks in astronomy. A faint object in the night sky could be a dim object that is relatively nearby or a bright object that is far, far away. ...
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.