A Star is
... • Stars vary in size and mass, and a star’s brightness is related to its size • Big stars appear brighter than smaller stars of the same temperature • Our sun is considered a medium-sized star • Most stars visible from Earth are medium-sized stars. • Many stars also have about the same mass as the s ...
... • Stars vary in size and mass, and a star’s brightness is related to its size • Big stars appear brighter than smaller stars of the same temperature • Our sun is considered a medium-sized star • Most stars visible from Earth are medium-sized stars. • Many stars also have about the same mass as the s ...
Stellar Characteristics and Evolution
... Star (and their attendant planets, if there are any) condense out of a protostellar nebula, a vast cloud of gas and dust that may be hundreds of AU in diameter initially. The cloud flattens into a disk due to its own rotation, spinning around a growing central mass of hydrogen and helium. Eventually ...
... Star (and their attendant planets, if there are any) condense out of a protostellar nebula, a vast cloud of gas and dust that may be hundreds of AU in diameter initially. The cloud flattens into a disk due to its own rotation, spinning around a growing central mass of hydrogen and helium. Eventually ...
STAR FORMATION (Ch. 19) - University of Texas Astronomy Home
... to be born with (with a slight dependence on other things, like its total metal abundance). Note: the “main sequence” is the location in the H-R diagram of all stars of different masses. That is the physical, and correct, way to define the term. Brown dwarfs: Stars with M < 0.1M0 never get hot enoug ...
... to be born with (with a slight dependence on other things, like its total metal abundance). Note: the “main sequence” is the location in the H-R diagram of all stars of different masses. That is the physical, and correct, way to define the term. Brown dwarfs: Stars with M < 0.1M0 never get hot enoug ...
Supernovae: Heavy Elements
... spectral class and luminosity. Some stars can be distinguished from one spectral class to another with the naked eye. • Main Sequence stars generally run from lower right (low temperature and luminosity) to upper left (high temperature and luminosity) • Exceptions - Secondary band of very cool, yet ...
... spectral class and luminosity. Some stars can be distinguished from one spectral class to another with the naked eye. • Main Sequence stars generally run from lower right (low temperature and luminosity) to upper left (high temperature and luminosity) • Exceptions - Secondary band of very cool, yet ...
GRB Progenitors and their environments
... • Collapsar Models: Can be produced in single and binary stars. Single star models require high rotation with minimal angular momentum loss in winds (perhaps rotationally-induced mixing can help?). Binary systems are used to i) remove the hydrogen envelope without losing angular momentum, ii) spinni ...
... • Collapsar Models: Can be produced in single and binary stars. Single star models require high rotation with minimal angular momentum loss in winds (perhaps rotationally-induced mixing can help?). Binary systems are used to i) remove the hydrogen envelope without losing angular momentum, ii) spinni ...
GET WORKSHEETS FROM MY ASSIGNMENTS PAGE Mrs
... 1. What are the stages in a low-mass star’s life? 2. What are the stages in a high-mass star’s life? 3. What determines a star’s type? 4. What makes the Sun an ideal star for life? 5. Is the Sun a low-mass or high-mass star? 6. Looking at the H-R diagram, what are the: ...
... 1. What are the stages in a low-mass star’s life? 2. What are the stages in a high-mass star’s life? 3. What determines a star’s type? 4. What makes the Sun an ideal star for life? 5. Is the Sun a low-mass or high-mass star? 6. Looking at the H-R diagram, what are the: ...
Mass
... Because the star is so far away, the scientist could not have the time to receive the radio signals from such a planet. B Because the star is so close that we should have received radio signals from the planet years ago. C Because the radio signals cannot penetrate the Earth’s atmosphere from ...
... Because the star is so far away, the scientist could not have the time to receive the radio signals from such a planet. B Because the star is so close that we should have received radio signals from the planet years ago. C Because the radio signals cannot penetrate the Earth’s atmosphere from ...
Sun, Moon, Earth,
... – Neutron Stars: Forms from the remains of the old star. • Very very high density and very very small. – As much as three times the mass of our star in an area the size of a city. – Some give off regular pulses of radio waves and are called pulsars. (these were originally called LGMs). ...
... – Neutron Stars: Forms from the remains of the old star. • Very very high density and very very small. – As much as three times the mass of our star in an area the size of a city. – Some give off regular pulses of radio waves and are called pulsars. (these were originally called LGMs). ...
Pulsar properties - Pulsar Search Collaboratory
... The millisecond and binary pulsars occupy the lower left part of the diagram.. Discuss possible evolutionary scenario from normal to MSP There are in fact two types Of “recycled pulsars” •P<30 ms with circular orbits •P>20 ms with eccentric orbits It is thought that these evolve from Low-mass X-ray ...
... The millisecond and binary pulsars occupy the lower left part of the diagram.. Discuss possible evolutionary scenario from normal to MSP There are in fact two types Of “recycled pulsars” •P<30 ms with circular orbits •P>20 ms with eccentric orbits It is thought that these evolve from Low-mass X-ray ...
Document
... caused by the pull of a small unseen planet. b. We have seen the motion of the planet caused by the wobble of the star. c. We have seen the changing position of the star caused by the pull of the small unseen planet. d. We have seen the changing velocity of the planet caused by the motion of the sta ...
... caused by the pull of a small unseen planet. b. We have seen the motion of the planet caused by the wobble of the star. c. We have seen the changing position of the star caused by the pull of the small unseen planet. d. We have seen the changing velocity of the planet caused by the motion of the sta ...
Document
... There are particular wavelengths that are missing The missing wavelengths correspond to the absorption spectrum of a number of elements Although is seems sensible to assume that the elements concerned are in the Earth’s atmosphere, this assumption is incorrect Wavelengths would still be abse ...
... There are particular wavelengths that are missing The missing wavelengths correspond to the absorption spectrum of a number of elements Although is seems sensible to assume that the elements concerned are in the Earth’s atmosphere, this assumption is incorrect Wavelengths would still be abse ...
THE SUN: OUR STAR
... Point A is where the Sun starts Hydrogen fusion Point B is where about half of the supply of the hydrogen in the core has been used up. This is where the Sun is in its lifetime right now. Point C is reached when there is no more hydrogen in the core and the fusion of hydrogen starts in the shell aro ...
... Point A is where the Sun starts Hydrogen fusion Point B is where about half of the supply of the hydrogen in the core has been used up. This is where the Sun is in its lifetime right now. Point C is reached when there is no more hydrogen in the core and the fusion of hydrogen starts in the shell aro ...
File
... such high temperatures that nuclear fusion begins again. This time, carbon atoms in the core fuse into heavier elements until the core is almost entirely made of iron. • When nuclear fusion stops, the star’s core begins to collapse under its own gravity. This causes the outer layers to explode outwa ...
... such high temperatures that nuclear fusion begins again. This time, carbon atoms in the core fuse into heavier elements until the core is almost entirely made of iron. • When nuclear fusion stops, the star’s core begins to collapse under its own gravity. This causes the outer layers to explode outwa ...
Multiple Choice, continued
... such high temperatures that nuclear fusion begins again. This time, carbon atoms in the core fuse into heavier elements until the core is almost entirely made of iron. • When nuclear fusion stops, the star’s core begins to collapse under its own gravity. This causes the outer layers to explode outwa ...
... such high temperatures that nuclear fusion begins again. This time, carbon atoms in the core fuse into heavier elements until the core is almost entirely made of iron. • When nuclear fusion stops, the star’s core begins to collapse under its own gravity. This causes the outer layers to explode outwa ...
supplemental educational materials PDF
... they are visible in the northern sky all year long. These include: Ursa Major, the Great Bear; Ursa Minor, the Small Bear; Draco, the Dragon; Cassiopeia, the Queen of Ethiopia; and Cepheus, the King of Ethiopia. • Students may incorrectly identify the Big Dipper or the Pleiades as constellations, bu ...
... they are visible in the northern sky all year long. These include: Ursa Major, the Great Bear; Ursa Minor, the Small Bear; Draco, the Dragon; Cassiopeia, the Queen of Ethiopia; and Cepheus, the King of Ethiopia. • Students may incorrectly identify the Big Dipper or the Pleiades as constellations, bu ...
Outline - March 16, 2010 Interstellar Medium (ISM) Why should you
... Cold clouds obscure our view at visible wavelengths, but infrared and radio light penetrates the clouds. ...
... Cold clouds obscure our view at visible wavelengths, but infrared and radio light penetrates the clouds. ...
Lecture 15, PPT version
... At their maximum brightness, supernovae are as bright as an entire galaxy. ...
... At their maximum brightness, supernovae are as bright as an entire galaxy. ...
The Basics of the Universe
... of the previous star, and does not sustain nuclear fusion. They are very dense because the atoms are compressed to such an extent that only the nuclei are left, since the lack of fusion allows gravity to crush it. In fact, the size of the star is so small now that it can be compared with that of the ...
... of the previous star, and does not sustain nuclear fusion. They are very dense because the atoms are compressed to such an extent that only the nuclei are left, since the lack of fusion allows gravity to crush it. In fact, the size of the star is so small now that it can be compared with that of the ...
Lyra
Lyra (/ˈlaɪərə/; Latin for lyre, from Greek λύρα) is a small constellation. It is one of 48 listed by the 2nd century astronomer Ptolemy, and is one of the 88 constellations recognized by the International Astronomical Union. Lyra was often represented on star maps as a vulture or an eagle carrying a lyre, and hence sometimes referred to as Aquila Cadens or Vultur Cadens. Beginning at the north, Lyra is bordered by Draco, Hercules, Vulpecula, and Cygnus. Lyra is visible from the northern hemisphere from spring through autumn, and nearly overhead, in temperate latitudes, during the summer months. From the southern hemisphere, it is visible low in the northern sky during the winter months.The lucida or brightest star—and one of the brightest stars in the sky—is the white main sequence star Vega, a corner of the Summer Triangle. Beta Lyrae is the prototype of a class of stars known as Beta Lyrae variables, binary stars so close to each other that they become egg-shaped and material flows from one to the other. Epsilon Lyrae, known informally as the Double Double, is a complex multiple star system. Lyra also hosts the Ring Nebula, the second-discovered and best-known planetary nebula.