Eksamination in FY2450 Astrophysics Wednesday June 8
... Merope, one of the Pleiades (seven sisters), is classified as Ve, the “e” telling that the spectrum has emission lines, believed to come from gas thrown out because the star rotates very fast. Sirius is classified as Vm, because its spectrum shows stronger lines than usual of some metals. ...
... Merope, one of the Pleiades (seven sisters), is classified as Ve, the “e” telling that the spectrum has emission lines, believed to come from gas thrown out because the star rotates very fast. Sirius is classified as Vm, because its spectrum shows stronger lines than usual of some metals. ...
Module 6: “The Message of Starlight Assignment 9: Parallax, stellar
... light years. (A light year is how far light travels in a year.) Now, if we know the distance to the star, we can convert its brightness, measured in magnitudes (mag), to the magnitude a star would have at a fixed distance which has been chosen to be 10 parsecs, or about 32.6 light years. The equatio ...
... light years. (A light year is how far light travels in a year.) Now, if we know the distance to the star, we can convert its brightness, measured in magnitudes (mag), to the magnitude a star would have at a fixed distance which has been chosen to be 10 parsecs, or about 32.6 light years. The equatio ...
THE METER STICK MODEL OF THE SOLAR SYSTEM
... Distances between planets are very large but they are insignificant compared with distances between stars. Because units that are commonly used to measure distances on Earth such as miles or kilometers are too small for use in astronomy, other units of distance are needed. Within the solar system, t ...
... Distances between planets are very large but they are insignificant compared with distances between stars. Because units that are commonly used to measure distances on Earth such as miles or kilometers are too small for use in astronomy, other units of distance are needed. Within the solar system, t ...
Astronomical Distance Ladder
... Fisher. It was shown that in disc galaxies the luminosity is related to the rotation velocity. For disc galaxies the luminosity is proportional to the size of the galaxy in other words L=c1 x R2. However, it is known that at a given distance R the velocity should be V2=GM/R, then solving for R gives ...
... Fisher. It was shown that in disc galaxies the luminosity is related to the rotation velocity. For disc galaxies the luminosity is proportional to the size of the galaxy in other words L=c1 x R2. However, it is known that at a given distance R the velocity should be V2=GM/R, then solving for R gives ...
Lecture6
... faster than the sound speed) winds from a near-by supernova explosion or UV light and winds from near-by hot O and B stars shocks protostar formation. • Physically, a dense, cool cloud of gas starts to contract due to self-gravity when a given amount of mass (hundreds of solar mass) gets smaller ...
... faster than the sound speed) winds from a near-by supernova explosion or UV light and winds from near-by hot O and B stars shocks protostar formation. • Physically, a dense, cool cloud of gas starts to contract due to self-gravity when a given amount of mass (hundreds of solar mass) gets smaller ...
Celestial Equator
... May have shrunk 15% in radius since 1993. This probably does not indicate evolution at its center. 570 ly away. Variable star. 1000 times as luminous as the sun Rigel - brightest star in Orion by (a bit more than -Orionis = Betelgeuse – a variable) 7th brightest star in the sky. 770 ly. Most lumino ...
... May have shrunk 15% in radius since 1993. This probably does not indicate evolution at its center. 570 ly away. Variable star. 1000 times as luminous as the sun Rigel - brightest star in Orion by (a bit more than -Orionis = Betelgeuse – a variable) 7th brightest star in the sky. 770 ly. Most lumino ...
MS Word
... 4.2 Estimate the average apparent magnitude of these stars from the table.__________________ 4.3 When you look at a bright, 1st magnitude star in the sky, you are probably looking at what kind of star? (hot/cool/blue/red)_______________________________ ...
... 4.2 Estimate the average apparent magnitude of these stars from the table.__________________ 4.3 When you look at a bright, 1st magnitude star in the sky, you are probably looking at what kind of star? (hot/cool/blue/red)_______________________________ ...
14-1 Reading Questions: Neutron Stars
... 1. A neutron star, containing a little more than _________ solar mass, compressed to a radius of about __________, can be left as a remnant after a type ______ supernova explosion. A neutron star’s density is so high that physicists calculate that this material is stable only as a __________________ ...
... 1. A neutron star, containing a little more than _________ solar mass, compressed to a radius of about __________, can be left as a remnant after a type ______ supernova explosion. A neutron star’s density is so high that physicists calculate that this material is stable only as a __________________ ...
Celestial Distances
... Summary (cont’d) For distant stars that are not variable and don’t have a nearby variable star, use the temperature - luminosity relation of the H-R diagram. Does require some work to determine if the star is main sequence, dwarf, or giant. Later we will see the use of red shift and supernovae ...
... Summary (cont’d) For distant stars that are not variable and don’t have a nearby variable star, use the temperature - luminosity relation of the H-R diagram. Does require some work to determine if the star is main sequence, dwarf, or giant. Later we will see the use of red shift and supernovae ...
FUN THINGS TO DO
... Our Sun is one of the stars in our galaxy, and our galaxy is slowly turning like milk swirled into a hot beverage. This causes the stars in the galaxy to change position, and that motion of the stars changes our view of them. It’s like waiting in line at an amusement park; as the line moves, the peo ...
... Our Sun is one of the stars in our galaxy, and our galaxy is slowly turning like milk swirled into a hot beverage. This causes the stars in the galaxy to change position, and that motion of the stars changes our view of them. It’s like waiting in line at an amusement park; as the line moves, the peo ...
AS2001 - University of St Andrews
... Near centre of galaxy: Shorter orbit period--> More passes thru spiral shocks --> More star generations --> m lower --> Z higher. (Also, more infall of IGM on outskirts.) ...
... Near centre of galaxy: Shorter orbit period--> More passes thru spiral shocks --> More star generations --> m lower --> Z higher. (Also, more infall of IGM on outskirts.) ...
Impossible planets.
... in October 1995 to announce they’d found something their colleagues had been seeking for decades -- a planet orbiting a sunlike star. The trouble was, nobody had ordered, or even imagined, a planet quite like the object circling 51 Pegasi, a star lying 50 light-years from Earth in the constellation ...
... in October 1995 to announce they’d found something their colleagues had been seeking for decades -- a planet orbiting a sunlike star. The trouble was, nobody had ordered, or even imagined, a planet quite like the object circling 51 Pegasi, a star lying 50 light-years from Earth in the constellation ...
ph507lecnote07
... the width of the galaxy's spectral lines. The empirically-derived relation states that the luminosity of a galaxy is directly proportional to the fourth power of its rotational velocity, which can be calculated from the width of the spectral line, and uses the distance modulus to find distance from ...
... the width of the galaxy's spectral lines. The empirically-derived relation states that the luminosity of a galaxy is directly proportional to the fourth power of its rotational velocity, which can be calculated from the width of the spectral line, and uses the distance modulus to find distance from ...
Document
... • This spreads all of the elements Hydrogen through Iron (which makes up our planets and other new stars) and forms all elements after Iron (up to element 92). ...
... • This spreads all of the elements Hydrogen through Iron (which makes up our planets and other new stars) and forms all elements after Iron (up to element 92). ...
28. What causes waves - Summer Science Safari
... absolute magnitude the actual brightness of a star parallax one of the ways we measure distances in space; apparent shift in a star’s location nebulae cloud of hyrdogen gas and dust; birthplace of stars Neutron stars extremely dense stars that form from a massive star supernova explosion of a star w ...
... absolute magnitude the actual brightness of a star parallax one of the ways we measure distances in space; apparent shift in a star’s location nebulae cloud of hyrdogen gas and dust; birthplace of stars Neutron stars extremely dense stars that form from a massive star supernova explosion of a star w ...
Neutron Stars
... Novae: white dwarf re-ignition in binary system • Nova is a faint star suddenly brightens by a factor of 104 to 108 over a few days or hours • It reaches a peak luminosity of about 105 Lsun • A nova is different from supernova (luminosity of 109 Lsun) • Material from an ordinary star in a close bin ...
... Novae: white dwarf re-ignition in binary system • Nova is a faint star suddenly brightens by a factor of 104 to 108 over a few days or hours • It reaches a peak luminosity of about 105 Lsun • A nova is different from supernova (luminosity of 109 Lsun) • Material from an ordinary star in a close bin ...
Nova
... In Algol-type binaries, one of the stars has evolved and expanded to fill a droplet-shaped potential surface, called the Roche lobe, within which material is gravitationally bound to the star (see Figure 1). The Roche surface is, therefore, the surface along which the gravitational potential is comm ...
... In Algol-type binaries, one of the stars has evolved and expanded to fill a droplet-shaped potential surface, called the Roche lobe, within which material is gravitationally bound to the star (see Figure 1). The Roche surface is, therefore, the surface along which the gravitational potential is comm ...
New York City Disciple Code - EarthSpaceScience-Keller
... core in and when core we want to be left alone. All orders are correct. ...
... core in and when core we want to be left alone. All orders are correct. ...
Spectroscopy – the study of the colors of light (the spectrum) given
... spectroscopic parallax to distinguish between red giants and red dwarfs and between white dwarfs and white giants. Therefore the distance to the other 10% of stars not on the main sequence can be found. ...
... spectroscopic parallax to distinguish between red giants and red dwarfs and between white dwarfs and white giants. Therefore the distance to the other 10% of stars not on the main sequence can be found. ...
Feb 2016 - Sudbury Astronomy Club
... Neptune. The quest has been plagued by far-fetched claims and even outright quackery. But the new evidence comes from a pair of respected planetary scientists, Konstantin Batygin and Mike Brown of the California Institute of Technology (Caltech) in Pasadena, who prepared for the inevitable skepticis ...
... Neptune. The quest has been plagued by far-fetched claims and even outright quackery. But the new evidence comes from a pair of respected planetary scientists, Konstantin Batygin and Mike Brown of the California Institute of Technology (Caltech) in Pasadena, who prepared for the inevitable skepticis ...
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.