Formation of Stars
... • How does a protostar’s radius and luminosity change as it contracts? • What is the relation between luminosity, radius, and temperature. • How does a protostar’s mass influence its speed of formation? • What is the Jean’s mass? ...
... • How does a protostar’s radius and luminosity change as it contracts? • What is the relation between luminosity, radius, and temperature. • How does a protostar’s mass influence its speed of formation? • What is the Jean’s mass? ...
The Sun - Sophia
... very dim (dwarfs) • Stars range from very hot blue on the outside (O class) to cool red on the outside (M class) ...
... very dim (dwarfs) • Stars range from very hot blue on the outside (O class) to cool red on the outside (M class) ...
PH607 – Galaxies 2
... not depend strongly on its distance from the centre. Away from the central bulge or outer rim, the typical stellar velocity is between 210 and 240 km/s. Hence the orbital period of the typical star is directly proportional only to the length of the path travelled. This is unlike the solar system whe ...
... not depend strongly on its distance from the centre. Away from the central bulge or outer rim, the typical stellar velocity is between 210 and 240 km/s. Hence the orbital period of the typical star is directly proportional only to the length of the path travelled. This is unlike the solar system whe ...
HR Diagram Explorer Worksheet
... Question 6: Use the results from the previous 5 questions to construct a “conceptual” HR Diagram. You simply want to draw arrows showing the direction in which variables are increasing. a) Draw in an arrow on the y axis showing the direction of increasing “intrinsic luminosity” of the stars. (This ...
... Question 6: Use the results from the previous 5 questions to construct a “conceptual” HR Diagram. You simply want to draw arrows showing the direction in which variables are increasing. a) Draw in an arrow on the y axis showing the direction of increasing “intrinsic luminosity” of the stars. (This ...
Define the following terms in the space provided
... your journey of a few weeks, you spend some time observing the stars. Which of the statements below would represent one of your observations? A) The northern stars were above the horizon less time each succeeding night. B) The region of the sky that was circumpolar increased each night. C) Polaris w ...
... your journey of a few weeks, you spend some time observing the stars. Which of the statements below would represent one of your observations? A) The northern stars were above the horizon less time each succeeding night. B) The region of the sky that was circumpolar increased each night. C) Polaris w ...
Mesa_star_MichaelPal..
... mass interior to cell qk = mk/Mk or 1-∑dqi ,i = 1,..,k-1, must be defined as this for accuracy close to outer envelope ...
... mass interior to cell qk = mk/Mk or 1-∑dqi ,i = 1,..,k-1, must be defined as this for accuracy close to outer envelope ...
Document
... • ~6% of normal solar-type stars have giant planets • ~10% or more of stars with masses ~1.5 M סּhave giant planets that tend to be more massive (more on this later in the course) • < 1% of the M dwarfs stars (low mass) have giant planets, but may have a large population of neptune-mass planets → l ...
... • ~6% of normal solar-type stars have giant planets • ~10% or more of stars with masses ~1.5 M סּhave giant planets that tend to be more massive (more on this later in the course) • < 1% of the M dwarfs stars (low mass) have giant planets, but may have a large population of neptune-mass planets → l ...
Tips on taking Astro sights
... appreciable interval between the times at which they are obtained, the first position line must be 'run on' to allow for the distance that the ship covers in that interval. The ship's position at the time of the second position line is then decided by the intersection of the second position line and ...
... appreciable interval between the times at which they are obtained, the first position line must be 'run on' to allow for the distance that the ship covers in that interval. The ship's position at the time of the second position line is then decided by the intersection of the second position line and ...
Magnitude Scale and Distance Measurements
... brightest stars "first class", and dimmer stars were second, third, fourth, fifth class stars. He set his magnitude scale as follows: if the apparent magnitude of star 1 is m1 and the apparent magnitude of star 2 is m2 , then if (m1 - m2 ) = 5, then I2 (the relative intensity of star 2) is 100 times ...
... brightest stars "first class", and dimmer stars were second, third, fourth, fifth class stars. He set his magnitude scale as follows: if the apparent magnitude of star 1 is m1 and the apparent magnitude of star 2 is m2 , then if (m1 - m2 ) = 5, then I2 (the relative intensity of star 2) is 100 times ...
a new isotopic abundance anomaly in chemically peculiar stars
... are correlated – both are shifted by roughly the same amount. This is just what would be expected if the stars had differing admixtures of 48Ca, with points for nearly pure 48Ca at the upper right. The cluster of points at the lower-left corner indicates a normal (solar) isotopic mix. If the discord ...
... are correlated – both are shifted by roughly the same amount. This is just what would be expected if the stars had differing admixtures of 48Ca, with points for nearly pure 48Ca at the upper right. The cluster of points at the lower-left corner indicates a normal (solar) isotopic mix. If the discord ...
Jeopardy - ScienceWhiz
... Off the chart to the right (WAY over to the right) and underneath (WAY under). ...
... Off the chart to the right (WAY over to the right) and underneath (WAY under). ...
Chapter 8: The Pennsylvanian Period in Alabama: Looking Up
... long periods of time. The second reason we would not see Orion or the Big Dipper as we see them now is the relatively short life times of massive stars. A star like the Sun can shine steadily, and provide a stable source of heat and light, for almost 10 billion years, deriving its luminosity from hy ...
... long periods of time. The second reason we would not see Orion or the Big Dipper as we see them now is the relatively short life times of massive stars. A star like the Sun can shine steadily, and provide a stable source of heat and light, for almost 10 billion years, deriving its luminosity from hy ...
Absolute Magnitudes of Supernovae
... Figure 1: Six views of a distance galaxy with a supernova to the lower left of the galaxy. Notice the decreasing brightness and changing color of the supernova with time. (Hubble Space Telescope) ...
... Figure 1: Six views of a distance galaxy with a supernova to the lower left of the galaxy. Notice the decreasing brightness and changing color of the supernova with time. (Hubble Space Telescope) ...
The Pennsylvanian Period in Alabama: Looking Up Astronomy and
... long periods of time. The second reason we would not see Orion or the Big Dipper as we see them now is the relatively short life times of massive stars. A star like the Sun can shine steadily, and provide a stable source of heat and light, for almost 10 billion years, deriving its luminosity from hy ...
... long periods of time. The second reason we would not see Orion or the Big Dipper as we see them now is the relatively short life times of massive stars. A star like the Sun can shine steadily, and provide a stable source of heat and light, for almost 10 billion years, deriving its luminosity from hy ...
Groups of Stars
... What makes a quasar so bright? The most likely explanation involves matter spiraling into a super-massive black hole with the mass of a billion suns. ...
... What makes a quasar so bright? The most likely explanation involves matter spiraling into a super-massive black hole with the mass of a billion suns. ...
2011 - Edexcel
... centre number and candidate number. all questions. t Answer the questions in the spaces provided t Answer – there may be more space than you need. ...
... centre number and candidate number. all questions. t Answer the questions in the spaces provided t Answer – there may be more space than you need. ...
TRANSIT
... The Month is an orbit of the Moon about the Earth and, yes, you've guessed, it's not that simple. Here we have Sidereal Months, Tropical Months, Anomalistic Months and Synodic Months. The week seems to have been adopted as seven days for a long, long time. So, we have a day of 24 solar hours, a yea ...
... The Month is an orbit of the Moon about the Earth and, yes, you've guessed, it's not that simple. Here we have Sidereal Months, Tropical Months, Anomalistic Months and Synodic Months. The week seems to have been adopted as seven days for a long, long time. So, we have a day of 24 solar hours, a yea ...
Variation of Elements in Nature
... The simplified picture of element creation in a star will have a lot of variation depending on the size of the star and its initial elemental abundance. A very heavy star will explode as a supernova leaving behind a neutron star. Stars of mass comparable to the Sun may end up as white dwarves. Old s ...
... The simplified picture of element creation in a star will have a lot of variation depending on the size of the star and its initial elemental abundance. A very heavy star will explode as a supernova leaving behind a neutron star. Stars of mass comparable to the Sun may end up as white dwarves. Old s ...
click here
... • Stars of given type of spectrum and the same colors have the same absolute magnitude (99.9%) • Stars have different apparent magnitudes depending on their distance. • Stars behind dust clouds look redder than they are intrinsically, so… m-M=5 log d1 –5+ A(l) (i.e., the star looks fainter) ...
... • Stars of given type of spectrum and the same colors have the same absolute magnitude (99.9%) • Stars have different apparent magnitudes depending on their distance. • Stars behind dust clouds look redder than they are intrinsically, so… m-M=5 log d1 –5+ A(l) (i.e., the star looks fainter) ...
E3 – Stellar distances
... • At distances greater than Mpc, neither parallax nor spectroscopic parallax can be relied upon to measure the distance to a star. • When we observe another galaxy, all of the stars in that galaxy are approximately the same distance away from the earth. What we really need is a light source of known ...
... • At distances greater than Mpc, neither parallax nor spectroscopic parallax can be relied upon to measure the distance to a star. • When we observe another galaxy, all of the stars in that galaxy are approximately the same distance away from the earth. What we really need is a light source of known ...
theh – rdiagramsofyoungclust ersandtheformati on ofp
... circumstellar absorption in the early stages of the planetary system which coexisted with the beginning of the w holly convective phase in the sun. The circumstellar absorption we have been considering need not be of the same nature as the interstellar extinction; the higher density should produce p ...
... circumstellar absorption in the early stages of the planetary system which coexisted with the beginning of the w holly convective phase in the sun. The circumstellar absorption we have been considering need not be of the same nature as the interstellar extinction; the higher density should produce p ...
21structure1i
... As the star get larger and smaller the brightness goes up and down in a very regular way There is a direct relationship between period and luminosity Long period (slow changes) means brighter star ...
... As the star get larger and smaller the brightness goes up and down in a very regular way There is a direct relationship between period and luminosity Long period (slow changes) means brighter star ...
IK Pegasi
IK Pegasi (or HR 8210) is a binary star system in the constellation Pegasus. It is just luminous enough to be seen with the unaided eye, at a distance of about 150 light years from the Solar System.The primary (IK Pegasi A) is an A-type main-sequence star that displays minor pulsations in luminosity. It is categorized as a Delta Scuti variable star and it has a periodic cycle of luminosity variation that repeats itself about 22.9 times per day. Its companion (IK Pegasi B) is a massive white dwarf—a star that has evolved past the main sequence and is no longer generating energy through nuclear fusion. They orbit each other every 21.7 days with an average separation of about 31 million kilometres, or 19 million miles, or 0.21 astronomical units (AU). This is smaller than the orbit of Mercury around the Sun.IK Pegasi B is the nearest known supernova progenitor candidate. When the primary begins to evolve into a red giant, it is expected to grow to a radius where the white dwarf can accrete matter from the expanded gaseous envelope. When the white dwarf approaches the Chandrasekhar limit of 1.44 solar masses (M☉), it may explode as a Type Ia supernova.