STAR FORMATION (Ch. 19) The basics: GRAVITY vs. PRESSURE
... This may fragment further, so have multiple stages of fragmentation (see Fig. 19.4). 3. Fragmentation ceases—center of fragment dense enough to become opaque to its own radiation, so it heats up, slowing the collapse. (Previously it was transparent and so could stay cool because radiation escaped ea ...
... This may fragment further, so have multiple stages of fragmentation (see Fig. 19.4). 3. Fragmentation ceases—center of fragment dense enough to become opaque to its own radiation, so it heats up, slowing the collapse. (Previously it was transparent and so could stay cool because radiation escaped ea ...
File - greenscapes4you
... detector, such as a CCD, that records how much energy strikes its light-sensitive surface each second. Total luminosity and total apparent brightness take into account all photons across the entire electromagnetic spectrum. Once a star’s apparent brightness has been measured, the next step in determ ...
... detector, such as a CCD, that records how much energy strikes its light-sensitive surface each second. Total luminosity and total apparent brightness take into account all photons across the entire electromagnetic spectrum. Once a star’s apparent brightness has been measured, the next step in determ ...
Assessment 1 - Stars - Teacher Key
... the statement in each box and decide if it is true or false. You will move from box to box by following the directional arrows (T=True, F= False). Continue to follow the arrows until you reach the true end of the maze (END E). All other exits are incorrect. If you exit at A, B, C, or D, retrace your ...
... the statement in each box and decide if it is true or false. You will move from box to box by following the directional arrows (T=True, F= False). Continue to follow the arrows until you reach the true end of the maze (END E). All other exits are incorrect. If you exit at A, B, C, or D, retrace your ...
Our Community`s Place Among the Stars
... The outer layers of the star expand and cool The star now uses helium as fuel ...
... The outer layers of the star expand and cool The star now uses helium as fuel ...
Hertzsprung-Russell Diagram—key to understanding properties of stars. 26 Sept
... You are a young astronomer in 1890, and you want to study stars. The distances to a few dozen stars are known. How do you attack this problem? What characteristics of stars do you see in the pictures of the Orion constellation and a globular cluster (taken 100 years later)? ...
... You are a young astronomer in 1890, and you want to study stars. The distances to a few dozen stars are known. How do you attack this problem? What characteristics of stars do you see in the pictures of the Orion constellation and a globular cluster (taken 100 years later)? ...
File
... • To measure to greater distances, we use more indirect methods which are calibrated by stellar parallax. • All other methods, except cosmological redshift, use the 1/r2 dimming of light. – We measure apparent brightness or magnitude and compare it with absolute brightness or magnitude. ...
... • To measure to greater distances, we use more indirect methods which are calibrated by stellar parallax. • All other methods, except cosmological redshift, use the 1/r2 dimming of light. – We measure apparent brightness or magnitude and compare it with absolute brightness or magnitude. ...
I CAN SEE THE STARS IN YOUR EYES
... at this speed, the trip from Earth to the sun, a distance of 93 million miles, would take about 8 minutes, not very long for such a long trip! Yet, to get to the next closest star, Proxima Centauri, would take 4.2 years. “Hmmm…,” you think to yourself, “that might be an interesting fact to include i ...
... at this speed, the trip from Earth to the sun, a distance of 93 million miles, would take about 8 minutes, not very long for such a long trip! Yet, to get to the next closest star, Proxima Centauri, would take 4.2 years. “Hmmm…,” you think to yourself, “that might be an interesting fact to include i ...
Roy - WordPress.com
... Rider” form a nakedeye double star. They are traveling through space together about 80 lightyears away from us, separated by about a lightyear. However, it is unknown if they are actually gravitationally bound to each other. A telescope splits Mizar itself into two stars, but these both are again ...
... Rider” form a nakedeye double star. They are traveling through space together about 80 lightyears away from us, separated by about a lightyear. However, it is unknown if they are actually gravitationally bound to each other. A telescope splits Mizar itself into two stars, but these both are again ...
Binary Star Systems Discussion Points 1. What characteristic of a
... a) The two stars are too close together to be resolved by a telescope. b) The two stars are too far away to be able to separate their images. c) One of the stars is too small or too dim to be able to see it against the glare of the larger, brighter star. 7. The spectroscopic lines periodically split ...
... a) The two stars are too close together to be resolved by a telescope. b) The two stars are too far away to be able to separate their images. c) One of the stars is too small or too dim to be able to see it against the glare of the larger, brighter star. 7. The spectroscopic lines periodically split ...
Physics@Brock - Brock University
... Big Bang created hydrogen and some helium, along with a slew of other subatomic particles and electromagnetic radiation, but all the heavier elements were created inside stars. When the early massive stars “died” (their lifetimes were very short due to their enormous mass) the resulting explosions ( ...
... Big Bang created hydrogen and some helium, along with a slew of other subatomic particles and electromagnetic radiation, but all the heavier elements were created inside stars. When the early massive stars “died” (their lifetimes were very short due to their enormous mass) the resulting explosions ( ...
Using a Planisphere - Amateur Observers` Society of New York
... stars that circle the North pole star, Polaris, the end star in the handle of the Little Dipper asterism, but don’t set. Therefore, you could observe any clear night of the year to see the galaxies M81 and 82 in the constellation of Ursa Major, the big bear, of which the Big Dipper asterism is a par ...
... stars that circle the North pole star, Polaris, the end star in the handle of the Little Dipper asterism, but don’t set. Therefore, you could observe any clear night of the year to see the galaxies M81 and 82 in the constellation of Ursa Major, the big bear, of which the Big Dipper asterism is a par ...
Powerpoint Presentation (large file)
... 1. Why do astronomers think that stars evolve? 2. What kind of matter exists in the spaces between the stars? 3. In what kind of nebulae do new stars form? 4. What steps are involved in forming a star like the Sun? 5. When a star forms, why does it end up with only a fraction of the available matter ...
... 1. Why do astronomers think that stars evolve? 2. What kind of matter exists in the spaces between the stars? 3. In what kind of nebulae do new stars form? 4. What steps are involved in forming a star like the Sun? 5. When a star forms, why does it end up with only a fraction of the available matter ...
Chapter 26 Book Questions
... D. It can be detected by observing how its gravity affects visible matter. 37. Why is it significant that the galaxies contain as much as ten times more dark matter than visible matter? ________________________________________________________________________________ ...
... D. It can be detected by observing how its gravity affects visible matter. 37. Why is it significant that the galaxies contain as much as ten times more dark matter than visible matter? ________________________________________________________________________________ ...
Unit 1
... • If you plot the positions of variable stars on the HR diagram, many of them fall in the “instability strip” – Most have surface temperatures of ~5000K, so appear yellow – Most are giants (Yellow Giants) – Instability comes from partial absorption of radiation in the interior of the star • Helium a ...
... • If you plot the positions of variable stars on the HR diagram, many of them fall in the “instability strip” – Most have surface temperatures of ~5000K, so appear yellow – Most are giants (Yellow Giants) – Instability comes from partial absorption of radiation in the interior of the star • Helium a ...
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2-2 wkst - Home [www.petoskeyschools.org]
... a. A star begins its life as a ball of gas and dust. b. As stars get older, they lose some of their material. c. Stars last forever. d. New stars form from the material of old stars. 2. During a star’s life cycle, hydrogen changes to helium in a process called ____________________. 3.When a star die ...
... a. A star begins its life as a ball of gas and dust. b. As stars get older, they lose some of their material. c. Stars last forever. d. New stars form from the material of old stars. 2. During a star’s life cycle, hydrogen changes to helium in a process called ____________________. 3.When a star die ...
Chapter16
... relative motions of the stars. I compare the actual motions of the local stars as they orbit the galaxy to the motions of birds relative to one another in a flock that is moving more or less together in a given direction. 4. The Brightnesses of Stars Except for historical reasons and the fact that s ...
... relative motions of the stars. I compare the actual motions of the local stars as they orbit the galaxy to the motions of birds relative to one another in a flock that is moving more or less together in a given direction. 4. The Brightnesses of Stars Except for historical reasons and the fact that s ...
Telescopes (continued). Properties of Stars.
... The parallax angle of the nearest star, Proxima Centauri, is 0.77 arcseconds. ...
... The parallax angle of the nearest star, Proxima Centauri, is 0.77 arcseconds. ...
An introduction to the HR diagram File
... sequence depends entirely on its mass. Low mass stars are found at the right and high mass stars at the left. • The mass of a star controls its radius, its temperature, its life expectancy and its eventual fate. ...
... sequence depends entirely on its mass. Low mass stars are found at the right and high mass stars at the left. • The mass of a star controls its radius, its temperature, its life expectancy and its eventual fate. ...
The Life of Stars
... blood, and the carbon in our apple pies were all made in the interior of collapsing stars. We are made of ...
... blood, and the carbon in our apple pies were all made in the interior of collapsing stars. We are made of ...
Constellations - Brown University Wiki
... though H.A.Rey, the author of “the Stars” and children books like Curious George, found original ways to connect the stars in a constellation in a way different from the usual one so that it often resembles more the name given to the constellation. Other cultures developed their early astronomy quit ...
... though H.A.Rey, the author of “the Stars” and children books like Curious George, found original ways to connect the stars in a constellation in a way different from the usual one so that it often resembles more the name given to the constellation. Other cultures developed their early astronomy quit ...
Star catalogue
A star catalogue, or star catalog, is an astronomical catalogue that lists stars. In astronomy, many stars are referred to simply by catalogue numbers. There are a great many different star catalogues which have been produced for different purposes over the years, and this article covers only some of the more frequently quoted ones. Star catalogues were compiled by many different ancient peoples, including the Babylonians, Greeks, Chinese, Persians, and Arabs. Most modern catalogues are available in electronic format and can be freely downloaded from NASA's Astronomical Data Center.Completeness and accuracy is described by the weakest apparent magnitude V (largest number) and the accuracy of the positions.