Widener University
... The moon has mass 7 x 1022 kg and radius 1.74 x 106 m. A small stone is released at a distance 2.0 x 106 m from the center, and eventually strikes the surface. Calculate the speed v of impact, in km/s. ...
... The moon has mass 7 x 1022 kg and radius 1.74 x 106 m. A small stone is released at a distance 2.0 x 106 m from the center, and eventually strikes the surface. Calculate the speed v of impact, in km/s. ...
Visual Measurements of the Multiple Star
... tronomic eyepiece is being used without a Barlow lens 8.1 with a position angle of 210 degrees and a separaand cannot effectively measure dim stars or ones with tion of 0.3 arc seconds (Mason 2009). This separation small separations. The choice of neglected double was just within the Dawes limit for ...
... tronomic eyepiece is being used without a Barlow lens 8.1 with a position angle of 210 degrees and a separaand cannot effectively measure dim stars or ones with tion of 0.3 arc seconds (Mason 2009). This separation small separations. The choice of neglected double was just within the Dawes limit for ...
Life as a Low
... He in core. 2. Red Supergiant: H fuses to He in shell around He core. 3. Helium Core Burning: He fuses to C in core while H fuses to He in shell. 4. Multiple Shell Burning: Many elements fuse in shells. 5. Supernova leaves Neutron Star behind. Not to scale! ...
... He in core. 2. Red Supergiant: H fuses to He in shell around He core. 3. Helium Core Burning: He fuses to C in core while H fuses to He in shell. 4. Multiple Shell Burning: Many elements fuse in shells. 5. Supernova leaves Neutron Star behind. Not to scale! ...
the magellanic clouds newsletter - Keele University Astrophysics
... age distribution of the LMC Cepheids is found to have a peak at log Age = 8.2 ± 0.1. This suggests that major star formation event took place at about 125–200 Myr ago which may have been triggered by a close encounter between the SMC and the LMC. Cepheids are found to be asymmetrically distributed t ...
... age distribution of the LMC Cepheids is found to have a peak at log Age = 8.2 ± 0.1. This suggests that major star formation event took place at about 125–200 Myr ago which may have been triggered by a close encounter between the SMC and the LMC. Cepheids are found to be asymmetrically distributed t ...
Polaris
... the north celestial pole – the point in the sky directly above Earth’s north rotational axis – on March 24, 2100. The computational wizard Jean Meeus figures Polaris will be 27’09” (0.4525o) from the north celestial pole at that time (a little less than the angular diameter of the moon when at its f ...
... the north celestial pole – the point in the sky directly above Earth’s north rotational axis – on March 24, 2100. The computational wizard Jean Meeus figures Polaris will be 27’09” (0.4525o) from the north celestial pole at that time (a little less than the angular diameter of the moon when at its f ...
Brown et al. 2008 Studying Resolved Stellar
... mix of chemical abundances and ages, an accurate star formation history can be reconstructed from photometry reaching well below the turnoff of the stellar main sequence. For decades, such stars could be resolved only within nearby star clusters of our own Galaxy, but in the 1990s, this technique wa ...
... mix of chemical abundances and ages, an accurate star formation history can be reconstructed from photometry reaching well below the turnoff of the stellar main sequence. For decades, such stars could be resolved only within nearby star clusters of our own Galaxy, but in the 1990s, this technique wa ...
Star Formation in Our Galaxy - Wiley-VCH
... their diameters (about 0.1 µm) and reradiate this energy into the infrared. Regions where the dust effectively blocks the light from background stars are traditionally known as dark clouds. Generally, these represent higher-density subunits within a flocculent cloud complex, although they can also b ...
... their diameters (about 0.1 µm) and reradiate this energy into the infrared. Regions where the dust effectively blocks the light from background stars are traditionally known as dark clouds. Generally, these represent higher-density subunits within a flocculent cloud complex, although they can also b ...
Review 3 (11-18-10)
... stars can be detected as pulsars • Black Holes: M more than 3 solar masses. Nothing stops the collapse and produces an object so compact that escape velocity is higher than speed of light; hence, not even light can escape. •NOTE: these are the masses of the dead stars NOT the masses they had when th ...
... stars can be detected as pulsars • Black Holes: M more than 3 solar masses. Nothing stops the collapse and produces an object so compact that escape velocity is higher than speed of light; hence, not even light can escape. •NOTE: these are the masses of the dead stars NOT the masses they had when th ...
Introduction: The History and Technique of Stellar Classification
... the study), which was published between 1918 and 1924 and provided classifications of 225,300 stars. Even this study, however, represents only a tiny fraction of the stars in the sky. In the course of the Harvard classification study, some of the old spectral types were consolidated together, and th ...
... the study), which was published between 1918 and 1924 and provided classifications of 225,300 stars. Even this study, however, represents only a tiny fraction of the stars in the sky. In the course of the Harvard classification study, some of the old spectral types were consolidated together, and th ...
EvoluGon of high mass stars Solar-‐type stars end their lives by
... At first it was not clear what the source of these radio pulses could be because of the extremely short period. The discovery of a pulsar in the Crab nebula, a well-‐known supernova remnant (t ...
... At first it was not clear what the source of these radio pulses could be because of the extremely short period. The discovery of a pulsar in the Crab nebula, a well-‐known supernova remnant (t ...
An interesting nebular object in LDN 288
... (b in Fig.5b). There is another star with a jet in its vicinity (object c in the Fig.5b). c. SNO 69 [3] (see Fig.5c). This looks like a trapezium-like system, consisting of four stars. There are spiral jets, at the ends of which there are condensations. It seems that not only the jets, but also the ...
... (b in Fig.5b). There is another star with a jet in its vicinity (object c in the Fig.5b). c. SNO 69 [3] (see Fig.5c). This looks like a trapezium-like system, consisting of four stars. There are spiral jets, at the ends of which there are condensations. It seems that not only the jets, but also the ...
THE ABSOLUTE MAGNITUDE OF RR LYRAE - Cosmos
... stars with larger relative errors have brighter luminosities, i.e., have smaller parallaxes, appears clearly when the true parallax is small, compared with error of parallax. Similarly the distant stars have too faint luminosities, i.e., have too large parallaxes, mainly because the true parallax is ...
... stars with larger relative errors have brighter luminosities, i.e., have smaller parallaxes, appears clearly when the true parallax is small, compared with error of parallax. Similarly the distant stars have too faint luminosities, i.e., have too large parallaxes, mainly because the true parallax is ...
Exam 2
... hot remnant of the central star heats the gas, causing it to glow. For a few thousand years, the dying star is surrounded by a beautiful gleaming cloud known as a planetary nebula. Planetary nebulae have a spectacular array of shapes, sizes and structures. This diversity holds clues about stellar ev ...
... hot remnant of the central star heats the gas, causing it to glow. For a few thousand years, the dying star is surrounded by a beautiful gleaming cloud known as a planetary nebula. Planetary nebulae have a spectacular array of shapes, sizes and structures. This diversity holds clues about stellar ev ...
Continuous Spectrum—Kirchoff`s First Law
... If we know the temperature of a main sequence star, we can estimate its absolute luminosity. Then a measurement of its apparent luminosity gives us the distance to the star ...
... If we know the temperature of a main sequence star, we can estimate its absolute luminosity. Then a measurement of its apparent luminosity gives us the distance to the star ...
Life Stages of High
... of objects with <0.08MSun before the core temperature becomes hot enough for fusion. • Starlike objects not massive enough to start fusion are brown dwarfs. ...
... of objects with <0.08MSun before the core temperature becomes hot enough for fusion. • Starlike objects not massive enough to start fusion are brown dwarfs. ...
Cassiopeia (constellation)
Cassiopeia is a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology, who boasted about her unrivalled beauty. Cassiopeia was one of the 48 constellations listed by the 2nd-century Greek astronomer Ptolemy, and it remains one of the 88 modern constellations today. It is easily recognizable due to its distinctive 'M' shape when in upper culmination but in higher northern locations when near lower culminations in spring and summer it has a 'W' shape, formed by five bright stars. It is bordered by Andromeda to the south, Perseus to the southeast, and Cepheus to the north. It is opposite the Big Dipper.In northern locations above 34ºN latitude it is visible year-round and in the (sub)tropics it can be seen at its clearest from September to early November in its characteristic 'M' shape. Even in low southern latitudes below 25ºS is can be seen low in the North.