The star and the trees prostrate
... core that eventually cools and contracts gravitationally to about the size of the Earth. The result is a white dwarf: the more massive it is, the greater its inward gravitational pull, and the smaller it becomes. A teaspoonful of white dwarf material would weigh five-and-a-half tons or more in the E ...
... core that eventually cools and contracts gravitationally to about the size of the Earth. The result is a white dwarf: the more massive it is, the greater its inward gravitational pull, and the smaller it becomes. A teaspoonful of white dwarf material would weigh five-and-a-half tons or more in the E ...
Life Cycle of a Star
... • Each protostar will turn into one main sequence star • 90% of stars are main sequence stars • Vary in surface temperature and absolute magnitude ...
... • Each protostar will turn into one main sequence star • 90% of stars are main sequence stars • Vary in surface temperature and absolute magnitude ...
HW #8 Answers (Due 10/21)
... Cloud collision with spiral arms – As molecular clouds orbit in a spiral galaxy they pass they periodically pass through an over density of gas which is related to the spiral density wave in the galaxy. When this happens, the interaction between the cloud and the spiral density wave can compress a c ...
... Cloud collision with spiral arms – As molecular clouds orbit in a spiral galaxy they pass they periodically pass through an over density of gas which is related to the spiral density wave in the galaxy. When this happens, the interaction between the cloud and the spiral density wave can compress a c ...
Physical Science Laboratory: Skyglobe
... you are looking straight up. Elevation in the top left corner should be set close to 90o. (as if you were lying on your back looking at the sky). Set direction to due North. 1. Which planets are overhead? ___________________________________________ 2. Is the Sun currently in the sky? _____ Using the ...
... you are looking straight up. Elevation in the top left corner should be set close to 90o. (as if you were lying on your back looking at the sky). Set direction to due North. 1. Which planets are overhead? ___________________________________________ 2. Is the Sun currently in the sky? _____ Using the ...
Lecture 31 - 2 The Death of Stars: Stellar Recycling Phase 3 -
... • Helium core shrinks by a factor of ~30 to a size approximately that of the Earth • Hydrogen “burning” (i.e. H→He+energy release) continues in a thin shell just outside collapsing He core. • total luminosity of star increases by 100 to 1000 due to renewed H burning + heating of collapsing core. • o ...
... • Helium core shrinks by a factor of ~30 to a size approximately that of the Earth • Hydrogen “burning” (i.e. H→He+energy release) continues in a thin shell just outside collapsing He core. • total luminosity of star increases by 100 to 1000 due to renewed H burning + heating of collapsing core. • o ...
Star - AUSD Blogs
... But three or four times in every thousand years occurs something beside which even a nova pales into total insignificance. When a star becomes a supernova, it may for a little while outshine all the massed suns of the galaxy. The Chinese astronomers watched this happen in AD 1054, not knowing what i ...
... But three or four times in every thousand years occurs something beside which even a nova pales into total insignificance. When a star becomes a supernova, it may for a little while outshine all the massed suns of the galaxy. The Chinese astronomers watched this happen in AD 1054, not knowing what i ...
final template instructions
... Context: The constellation of Orion, the Hunter, is surrounded by a cloud of space dust called the Orion Nebula. ecliptic Definition: The plane defined by the path of the sun as it appears to move through the constellations. Context: When the moon crosses the ecliptic on the light side of the Earth, ...
... Context: The constellation of Orion, the Hunter, is surrounded by a cloud of space dust called the Orion Nebula. ecliptic Definition: The plane defined by the path of the sun as it appears to move through the constellations. Context: When the moon crosses the ecliptic on the light side of the Earth, ...
Page R63 - ClassZone
... plotted according to brightness and surface temperature. Most stars fall within a diagonal band called the main sequence. In the mainsequence stage of a star’s life cycle, brightness is closely related to surface temperature. Red giant and red supergiant stars appear above the main sequence on the d ...
... plotted according to brightness and surface temperature. Most stars fall within a diagonal band called the main sequence. In the mainsequence stage of a star’s life cycle, brightness is closely related to surface temperature. Red giant and red supergiant stars appear above the main sequence on the d ...
Astronomy Unit Test Review Sheet
... Apparent magnitude is the brightness a star appears from earth and absolute magnitude is the actual brightness if stars were all the same distance away. The absolute magnitude tells a scientist more about a star than the apparent magnitude. ...
... Apparent magnitude is the brightness a star appears from earth and absolute magnitude is the actual brightness if stars were all the same distance away. The absolute magnitude tells a scientist more about a star than the apparent magnitude. ...
PDF Version
... varies with the star’s intrinsic brightness. The star’s apparent brightness, which is the brightness that we can see ourselves, is equal to the intrinsic brightness divided by the square of the distance from us to the star. Astronomers used Cepheid variables in a nearby galaxy, which are all about t ...
... varies with the star’s intrinsic brightness. The star’s apparent brightness, which is the brightness that we can see ourselves, is equal to the intrinsic brightness divided by the square of the distance from us to the star. Astronomers used Cepheid variables in a nearby galaxy, which are all about t ...
Properties of Stars
... Starlight can be analyzed using a spectroscope to infer which gases make up the star. ...
... Starlight can be analyzed using a spectroscope to infer which gases make up the star. ...
Cosmology, galaxies, stars and the sun
... supergiant star’s protons and electrons combine to form neutrons. •The creates pressure that halts the collapse of the core. •These neutrons stars can have 1.5 to 3 times more mass that the sun. ...
... supergiant star’s protons and electrons combine to form neutrons. •The creates pressure that halts the collapse of the core. •These neutrons stars can have 1.5 to 3 times more mass that the sun. ...
Multiple choice test questions 1, Winter Semester
... 39) Why are astronauts weightless in the Space Station? A) because the Space Station is constantly in free-fall around the Earth B) because the Space Station is traveling so fast C) because there is no gravity in space D) because the Space Station is moving at constant velocity 40) Why were ancient ...
... 39) Why are astronauts weightless in the Space Station? A) because the Space Station is constantly in free-fall around the Earth B) because the Space Station is traveling so fast C) because there is no gravity in space D) because the Space Station is moving at constant velocity 40) Why were ancient ...
Astronomy HOMEWORK Chapter 4 - University of San Diego Home
... light, d. ultraviolet, e. X ray a. infrared 4. What is a blackbody? What does it mean to say that a star appears almost like a blackbody? If stars appear to be like blackbodies, why are they not black? A blackbody is an object that absorbs all of the enrgy that falls on it. According to the laws of ...
... light, d. ultraviolet, e. X ray a. infrared 4. What is a blackbody? What does it mean to say that a star appears almost like a blackbody? If stars appear to be like blackbodies, why are they not black? A blackbody is an object that absorbs all of the enrgy that falls on it. According to the laws of ...
Young Stars
... •Light stars much more common than heavy ones •Objects lighter than 0.08 MSun are called Brown brown Dwarf dwarfs ...
... •Light stars much more common than heavy ones •Objects lighter than 0.08 MSun are called Brown brown Dwarf dwarfs ...
Bez tytułu slajdu
... Evolution of stars depend on their mass. Those above 8 Solar masses, at the end of the life, were all the termonuclear fuel is burn into iron, first collapse, and then explode into supernova. A part of the mass is expelled and the remnants form a core of about 20 km diameter made of neutrons. The ex ...
... Evolution of stars depend on their mass. Those above 8 Solar masses, at the end of the life, were all the termonuclear fuel is burn into iron, first collapse, and then explode into supernova. A part of the mass is expelled and the remnants form a core of about 20 km diameter made of neutrons. The ex ...
The Stars - University of Redlands
... Mizar, 88 light years distant, is the middle star in the handle of the Big Dipper. It was the first binary star system to be imaged with a telescope. Spectroscopic observations show periodic Doppler shifts in the spectra of Mizar A and B, indicating that they are each binary stars. But they were too ...
... Mizar, 88 light years distant, is the middle star in the handle of the Big Dipper. It was the first binary star system to be imaged with a telescope. Spectroscopic observations show periodic Doppler shifts in the spectra of Mizar A and B, indicating that they are each binary stars. But they were too ...
September 3 and 5 slides
... reasons: (1) measurements of proper motions in M101 (Adrian von Maanen) lead to ludicrous rotation speeds if M101 were as big as the Milky Way; (2) comparison of brightness of SAndromedae in M31 with Nova Persei in the Milky Way ...
... reasons: (1) measurements of proper motions in M101 (Adrian von Maanen) lead to ludicrous rotation speeds if M101 were as big as the Milky Way; (2) comparison of brightness of SAndromedae in M31 with Nova Persei in the Milky Way ...
30.2 PowerPoint Stellar Evolution
... the core of the star The energy from fusion balances the force of gravity and makes it a very stable stage ...
... the core of the star The energy from fusion balances the force of gravity and makes it a very stable stage ...
Luminosities and magnitudes of stars
... a measure of how big that object appears to an observer at that point. For instance, a small object nearby could subtend the same solid angle as a large object far away. The solid angle is proportional to the surface area, S, of a projection of that object onto a sphere centered at that point, divid ...
... a measure of how big that object appears to an observer at that point. For instance, a small object nearby could subtend the same solid angle as a large object far away. The solid angle is proportional to the surface area, S, of a projection of that object onto a sphere centered at that point, divid ...
The Easily Visible Sky Tools of Astronomy Stars Galaxies Cosmology
... A Star’s brightness, depends on its distance from us. - there are stars much more luminous than our sun in the sky, however, they are not nearly as bright because they are far away. - Scientists will use apparent brightness and flux interchangeably. A star’s apparent brightness = ...
... A Star’s brightness, depends on its distance from us. - there are stars much more luminous than our sun in the sky, however, they are not nearly as bright because they are far away. - Scientists will use apparent brightness and flux interchangeably. A star’s apparent brightness = ...
September 2013 - Joliet Junior College
... The three stars that makeup the Summer Triangle are directly above at midevening and the Milky Way runs between them. Cassiopeia is above the Summer Triangle and looks like a “W” of stars. The Milky Way runs from Cassiopeia through the Triangle down to Sagittarius at the horizon. Sagittarius looks l ...
... The three stars that makeup the Summer Triangle are directly above at midevening and the Milky Way runs between them. Cassiopeia is above the Summer Triangle and looks like a “W” of stars. The Milky Way runs from Cassiopeia through the Triangle down to Sagittarius at the horizon. Sagittarius looks l ...
Main Sequence stars
... The star Rigel is about 100,000 times brighter than the Sun and belongs to spectral type B8. The star Sirius B is about 3000 times dimmer than the Sun and also belongs to spectral type B8. Which star has the greatest surface temperature? 1. Rigel 2. Sirius B 3. They have the same temperature. 4. Th ...
... The star Rigel is about 100,000 times brighter than the Sun and belongs to spectral type B8. The star Sirius B is about 3000 times dimmer than the Sun and also belongs to spectral type B8. Which star has the greatest surface temperature? 1. Rigel 2. Sirius B 3. They have the same temperature. 4. Th ...
Perseus (constellation)
Perseus, named after the Greek mythological hero Perseus, is a constellation in the northern sky. It was one of 48 listed by the 2nd-century astronomer Ptolemy and among the 88 modern constellations defined by the International Astronomical Union (IAU). It is located in the northern celestial hemisphere near several other constellations named after legends surrounding Perseus, including Andromeda to the west and Cassiopeia to the north. Perseus is also bordered by Aries and Taurus to the south, Auriga to the east, Camelopardalis to the north, and Triangulum to the west.The galactic plane of the Milky Way passes through Perseus but is mostly obscured by molecular clouds. The constellation's brightest star is the yellow-white supergiant Alpha Persei (also called Mirfak), which shines at magnitude 1.79. It and many of the surrounding stars are members of an open cluster known as the Alpha Persei Cluster. The best-known star, however, is Algol (Beta Persei), linked with ominous legends because of its variability, which is noticeable to the naked eye. Rather than being an intrinsically variable star, it is an eclipsing binary. Other notable star systems in Perseus include X Persei, a binary system containing a neutron star, and GK Persei, a nova that peaked at magnitude 0.2 in 1901. The Double Cluster, comprising two open clusters quite near each other in the sky, was known to the ancient Chinese. The constellation gives its name to the Perseus Cluster (Abell 426), a massive galaxy cluster located 250 million light-years from Earth. It hosts the radiant of the annual Perseids meteor shower—one of the most prominent meteor showers in the sky.