![Expansion of the Universe](http://s1.studyres.com/store/data/004866044_1-7f53858b5c799f66e2418333ab43dad6-300x300.png)
Expansion of the Universe
... 1. Scattering of blue and green light - i.e. why the sky appears blue, and why some sunrises or sunsets may appear red. Dust, smoke from forest fires, or other intervening material between the source and the observer can scatter (remove) the higher frequency colors (blue, green, yellow, and orange) ...
... 1. Scattering of blue and green light - i.e. why the sky appears blue, and why some sunrises or sunsets may appear red. Dust, smoke from forest fires, or other intervening material between the source and the observer can scatter (remove) the higher frequency colors (blue, green, yellow, and orange) ...
Stars and Universe Test Review - Garnet Valley School District
... massive object then exploded outward hurling this material in all directions 36. _________________________ uses curved lenses to bend (refract) light to produce an image 37. _________________________ spectral lines shifted towards the red end of visible spectrum. Object is moving away from you. 38. ...
... massive object then exploded outward hurling this material in all directions 36. _________________________ uses curved lenses to bend (refract) light to produce an image 37. _________________________ spectral lines shifted towards the red end of visible spectrum. Object is moving away from you. 38. ...
PowerPoint Presentation - Properties of Stars
... opening and closing each eye until you can no longer detect any parallax. How far did your partner get? Questions: a) How does parallax vary with distance of the pen from your face? b) Is this method useful for finding distances to very far away things? Why or why not? c) To measure a parallax, you ...
... opening and closing each eye until you can no longer detect any parallax. How far did your partner get? Questions: a) How does parallax vary with distance of the pen from your face? b) Is this method useful for finding distances to very far away things? Why or why not? c) To measure a parallax, you ...
PC2491 Examples 2
... Show that, using reasonable arguments, the ‘half light radius’ (Re) of an elliptical galaxy mass M, luminosity L is related to the stellar dispersion (the average surface brightness within Re (e) via ...
... Show that, using reasonable arguments, the ‘half light radius’ (Re) of an elliptical galaxy mass M, luminosity L is related to the stellar dispersion (the average surface brightness within Re (e) via ...
Chapter 28 – Stars and Galaxies
... 1. The actual brightness of the star is luminosity 2. If two stars have the same surface temperature, the larger star would be more luminous 3. If the same size, hotter one would be brighter 4. Types of magnitude a. Absolute – as if all stars were same distance from earth b. Apparent – as they appea ...
... 1. The actual brightness of the star is luminosity 2. If two stars have the same surface temperature, the larger star would be more luminous 3. If the same size, hotter one would be brighter 4. Types of magnitude a. Absolute – as if all stars were same distance from earth b. Apparent – as they appea ...
OUSNMAR05 - The Open University
... give the distinct impression of two large eyes requiring moderate apertures to see. It is one of the faintest of the Messier objects. NGC3992 (M109) (10.6) sg. About a degree SE of UMa this object is best observed using high power to remove the bright star (a natural form of light pollution!) out ...
... give the distinct impression of two large eyes requiring moderate apertures to see. It is one of the faintest of the Messier objects. NGC3992 (M109) (10.6) sg. About a degree SE of UMa this object is best observed using high power to remove the bright star (a natural form of light pollution!) out ...
The Runaway Universe - Astronomy & Astrophysics Group
... The galaxy is, in fact, nothing but a collection of innumerable stars grouped together in clusters. Upon whatever part of it the telescope is directed, a vast crowd of stars is immediately presented to view. Many of them are rather large and quite bright, while the number of smaller ones is quite be ...
... The galaxy is, in fact, nothing but a collection of innumerable stars grouped together in clusters. Upon whatever part of it the telescope is directed, a vast crowd of stars is immediately presented to view. Many of them are rather large and quite bright, while the number of smaller ones is quite be ...
Scientists classify stars by
... would look the same because the two lights are exactly the same. Their absolute magnitude is the same. Distance makes them look different. The same is true for stars. Two stars could be the same brightness but their distance from us makes their brightness different. ...
... would look the same because the two lights are exactly the same. Their absolute magnitude is the same. Distance makes them look different. The same is true for stars. Two stars could be the same brightness but their distance from us makes their brightness different. ...
Life Cycle of Stars
... – Measured in light-years (ly) • The distance which a ray of light would travel in one year • About 6,000,000,000,000 (6 trillion) miles • 186,000 miles per second Also measured in parsecs (pc) • 3.26 ly ...
... – Measured in light-years (ly) • The distance which a ray of light would travel in one year • About 6,000,000,000,000 (6 trillion) miles • 186,000 miles per second Also measured in parsecs (pc) • 3.26 ly ...
Feb 2017 - What`s Out Tonight?
... and hugs close to the Sun, so you see it for a short time in the longer in its group. west after sunset or in the east before sunrise. Jupiter can be out Globular Clusters look like fuzzy balls because they contain all night and always outshines any star. Everyone enjoys its 4 tens of thousands star ...
... and hugs close to the Sun, so you see it for a short time in the longer in its group. west after sunset or in the east before sunrise. Jupiter can be out Globular Clusters look like fuzzy balls because they contain all night and always outshines any star. Everyone enjoys its 4 tens of thousands star ...
Chapter 28 – Stars and Galaxies
... as a single star in our sky There is between 50-100 billion galaxies There are millions of light years between galaxies Sun belongs to the Milky Way Galaxy which is a spiral galaxy Milky Way belongs to the Local Group of about 30 galaxies ...
... as a single star in our sky There is between 50-100 billion galaxies There are millions of light years between galaxies Sun belongs to the Milky Way Galaxy which is a spiral galaxy Milky Way belongs to the Local Group of about 30 galaxies ...
"Stars" Power Point notes
... closer to the source. • Luminosity is measured by how much energy in joules is released per second. • One joule per second is called a watt. ...
... closer to the source. • Luminosity is measured by how much energy in joules is released per second. • One joule per second is called a watt. ...
Lecture 12
... Measure the energy flux from the star (integrated over all wavelengths): inverse square law, L F= 4pd 2 …gives the bolometric luminosity if the distance d is known. Can determine the distance directly if we can measure the ...
... Measure the energy flux from the star (integrated over all wavelengths): inverse square law, L F= 4pd 2 …gives the bolometric luminosity if the distance d is known. Can determine the distance directly if we can measure the ...
29.2 Measuring the Stars - Mr. Tobin`s Earth Science Class
... gravitationally bound together and that orbit a common center mass. ...
... gravitationally bound together and that orbit a common center mass. ...
Notes
... The generated heat will then exactly match the outgoing energy flow (luminosity) at any point in the star. Heat flows from hot to cold temperature gradient is required to carry the luminosity outward: Therefore T(r) and P(r) drop towards the surface (r) also drops ...
... The generated heat will then exactly match the outgoing energy flow (luminosity) at any point in the star. Heat flows from hot to cold temperature gradient is required to carry the luminosity outward: Therefore T(r) and P(r) drop towards the surface (r) also drops ...
1.1 Stars in the Broader Context of Modern Astro
... Today stars play a key role in many branches of astronomy, as well as being of interest in their own right. • ‘The epoch of reionisation’, which has been described as the ‘last frontier in observational cosmology’ marks the period—approximately 600 million years after the Big Bang—when the Universe ...
... Today stars play a key role in many branches of astronomy, as well as being of interest in their own right. • ‘The epoch of reionisation’, which has been described as the ‘last frontier in observational cosmology’ marks the period—approximately 600 million years after the Big Bang—when the Universe ...
Friday, April 25 - Otterbein University
... – Assumed all stars have the same absolute brightness – Counts stars as a function of apparent magnitude – Brighter stars closer to us; fainter stars further away – Cut off in brightness corresponds to a cut off at a certain distance. ...
... – Assumed all stars have the same absolute brightness – Counts stars as a function of apparent magnitude – Brighter stars closer to us; fainter stars further away – Cut off in brightness corresponds to a cut off at a certain distance. ...
Unit 3 - Section 9.2 2011 Star Characteristics0
... 2. There is also a spectral pattern for the Sun. What is the elemental composition of the Sun? 3. There are three “mystery stars.” Using a ruler, line up the spectral patterns of the elements to the mystery stars. 4. Answer the following questions. a. In which two mystery stars is calcium present? b ...
... 2. There is also a spectral pattern for the Sun. What is the elemental composition of the Sun? 3. There are three “mystery stars.” Using a ruler, line up the spectral patterns of the elements to the mystery stars. 4. Answer the following questions. a. In which two mystery stars is calcium present? b ...
Integrative Studies 410 Our Place in the Universe
... – Assumed all stars have the same absolute brightness – Counts stars as a function of apparent magnitude – Brighter stars closer to us; fainter stars further away – Cut off in brightness corresponds to a cut off at a certain distance. ...
... – Assumed all stars have the same absolute brightness – Counts stars as a function of apparent magnitude – Brighter stars closer to us; fainter stars further away – Cut off in brightness corresponds to a cut off at a certain distance. ...
lifedeath - University of Glasgow
... Hydrogen fusion – fuelling a star’s nuclear furnace H = Hydrogen He = Helium ...
... Hydrogen fusion – fuelling a star’s nuclear furnace H = Hydrogen He = Helium ...
Stars-Chapter 18
... • Astronomers can study the spectrum to find out what elements make up the star ...
... • Astronomers can study the spectrum to find out what elements make up the star ...
Document
... 2. An object that is so massive that light cannot escape its gravity is called a ___________ ___________. 3. A large, reddish star that is late in its life cycle is called a _______ ________. 4. A small, hot, dim star that is the leftover center of an old star is called a ___________ ____________. 5 ...
... 2. An object that is so massive that light cannot escape its gravity is called a ___________ ___________. 3. A large, reddish star that is late in its life cycle is called a _______ ________. 4. A small, hot, dim star that is the leftover center of an old star is called a ___________ ____________. 5 ...
Malmquist bias
The Malmquist bias is an effect in observational astronomy which leads to the preferential detection of intrinsically bright objects. It was first described in 1922 by Swedish astronomer Gunnar Malmquist (1893–1982), who then greatly elaborated upon this work in 1925. In statistics, this bias is referred to as a selection bias and affects the survey results in a brightness limited survey, where stars below a certain apparent brightness are not included. Since observed stars and galaxies appear dimmer when farther away, the brightness that is measured will fall off with distance until their brightness falls below the observational threshold. Objects which are more luminous, or intrinsically brighter, can be observed at a greater distance, creating a false trend of increasing intrinsic brightness, and other related quantities, with distance. This effect has led to many spurious claims in the field of astronomy. Properly correcting for these effects has become an area of great focus.