Stellar Evolution
... • A core with remaining mass of 1.4 to 3 M, composed of tightly packed neutrons. • These tiny stars are much smaller than planet Earth -- in fact, they are about the diameter of a large city (~20 km). • One cubic centimeter (like a sugar cube) of a neutron star, would have a mass of about 1011 kg! ...
... • A core with remaining mass of 1.4 to 3 M, composed of tightly packed neutrons. • These tiny stars are much smaller than planet Earth -- in fact, they are about the diameter of a large city (~20 km). • One cubic centimeter (like a sugar cube) of a neutron star, would have a mass of about 1011 kg! ...
Star Track 2 - The Search for a Supermassive Black... Early radio astronomers detected an immensely
... The object has a mass about 3 million times the mass of the Sun. (This is not too far off from the figure given in lecture of about 4.5 million Solar masses.) 6. The closest approach of SO-2 to SgrA* is only 120 AU, so SgrA* must be smaller than that. Calculate the minimum density of SgrA* (in solar ...
... The object has a mass about 3 million times the mass of the Sun. (This is not too far off from the figure given in lecture of about 4.5 million Solar masses.) 6. The closest approach of SO-2 to SgrA* is only 120 AU, so SgrA* must be smaller than that. Calculate the minimum density of SgrA* (in solar ...
doc - University of Texas Astronomy
... lines of evidence; 1. Visible companion has mass around 25Mo. Using the known period and the primary star’s orbital speed from the radial velocity, get sum of masses, and hence mass of invisible companion: about 10Mo must be black hole (assuming theoretical calculation of neutron star/black hole m ...
... lines of evidence; 1. Visible companion has mass around 25Mo. Using the known period and the primary star’s orbital speed from the radial velocity, get sum of masses, and hence mass of invisible companion: about 10Mo must be black hole (assuming theoretical calculation of neutron star/black hole m ...
Astrophysics
... 1572 and that was one of the reasons he decided to study astronomy with such vigour. Now the remnants of that supernova make a lovely sight (see Hubble telescope picture of it.) 4. Whole new worlds - the discovery of galaxies • Hubble found (using Cepheids) that certain 'nebulae' were not dust cloud ...
... 1572 and that was one of the reasons he decided to study astronomy with such vigour. Now the remnants of that supernova make a lovely sight (see Hubble telescope picture of it.) 4. Whole new worlds - the discovery of galaxies • Hubble found (using Cepheids) that certain 'nebulae' were not dust cloud ...
HR Diagram - TeacherWeb
... A. Which star group does Proxima Centauri belong to? _________________________ B. On the H-R diagram, which star would Proxima Centauri be near? ______________ 8. Describe: Locate the Sun on the H-R diagram. How will the Sun’s luminosity and temperature change as it ages? How will these changes affe ...
... A. Which star group does Proxima Centauri belong to? _________________________ B. On the H-R diagram, which star would Proxima Centauri be near? ______________ 8. Describe: Locate the Sun on the H-R diagram. How will the Sun’s luminosity and temperature change as it ages? How will these changes affe ...
Stellar Evolution
... How does mass affect what happens? How do stars die? Where does gold come from? ...
... How does mass affect what happens? How do stars die? Where does gold come from? ...
Lecture 12, PPT version
... Galaxy). All of the stars formed at roughly the same time. Globular clusters have lots of RED stars, but no BLUE stars (because they died long ago and were not “replenished”). ...
... Galaxy). All of the stars formed at roughly the same time. Globular clusters have lots of RED stars, but no BLUE stars (because they died long ago and were not “replenished”). ...
What are the Spectral Lines? - University of Texas Astronomy Home
... - real knowledge only due to hard facts, e.g., laboratory science, measurements • claimed ...
... - real knowledge only due to hard facts, e.g., laboratory science, measurements • claimed ...
PHY111 Stellar Evolution
... most massive stars explode as red supergiants, but some (e.g. SN 1987A) explode as blue supergiants ...
... most massive stars explode as red supergiants, but some (e.g. SN 1987A) explode as blue supergiants ...
Eruptive Variables - Scientific Research Publishing
... As regards the conditions of equilibrium of a star, it is necessary to take account the radiation pressure. The formulae from the theory enable in to calculate what proportion of the weight of the stellar mass is borne by the radiation pressure, and what part being supported by the hot gases pressur ...
... As regards the conditions of equilibrium of a star, it is necessary to take account the radiation pressure. The formulae from the theory enable in to calculate what proportion of the weight of the stellar mass is borne by the radiation pressure, and what part being supported by the hot gases pressur ...
of the Sun
... • Both matter and anti-matter formed, but for some reason, there was a slight excess of matter. ...
... • Both matter and anti-matter formed, but for some reason, there was a slight excess of matter. ...
Chapter21
... close pair are close enough together to do so. 2. Binaries with periods less than a few years are usually only a few AU apart. This is too close together for their images to be separated so that they would be seen as a visual binary. 3. If the binary doesn’t appear to obey Kepler’s laws, the orbit m ...
... close pair are close enough together to do so. 2. Binaries with periods less than a few years are usually only a few AU apart. This is too close together for their images to be separated so that they would be seen as a visual binary. 3. If the binary doesn’t appear to obey Kepler’s laws, the orbit m ...
No Slide Title
... • We learn about stars by studying energy. – Stars produce a full range of electromagnetic radiation, from high-energy X-rays to low-energy radio waves. – Scientists use optical telescopes to study visible light and radio telescopes to study radio waves emitted from astronomical objects. – Earth’s a ...
... • We learn about stars by studying energy. – Stars produce a full range of electromagnetic radiation, from high-energy X-rays to low-energy radio waves. – Scientists use optical telescopes to study visible light and radio telescopes to study radio waves emitted from astronomical objects. – Earth’s a ...
Name Date Life and Death of a Star 2015 1. In the main
... B. hydrogen fusing to helium makes the core more dense C. carbon and iron are accumulating in the core In a timeline that shows the sequence of events that occurs during the formation of a star, what happens after the temperature increases in a proto-star? A. nuclear fusion begins B. gravity ceases ...
... B. hydrogen fusing to helium makes the core more dense C. carbon and iron are accumulating in the core In a timeline that shows the sequence of events that occurs during the formation of a star, what happens after the temperature increases in a proto-star? A. nuclear fusion begins B. gravity ceases ...
Lecture Nine (Powerpoint format) - Flash
... excited state of an atom. In an excited atomic state, an electron will transition from one state to a lower state, emitting a particle of light (a photon) in the process. In an excited nuclear state, a nucleus will transition from an excited state to a lower state, emitting a particle of light ( ...
... excited state of an atom. In an excited atomic state, an electron will transition from one state to a lower state, emitting a particle of light (a photon) in the process. In an excited nuclear state, a nucleus will transition from an excited state to a lower state, emitting a particle of light ( ...
Lecture 8: The Stars - Department of Physics and Astronomy
... Out to a distance of 4 pc, 12 light, from the Sun, there are 30 stars. The brightest is Sirius, which can be seen in the night sky. Only 10 are bright enough to see with the naked eye. The rest have been discovered through telescopic surveys of the sky. ...
... Out to a distance of 4 pc, 12 light, from the Sun, there are 30 stars. The brightest is Sirius, which can be seen in the night sky. Only 10 are bright enough to see with the naked eye. The rest have been discovered through telescopic surveys of the sky. ...
Celestial Objects
... Planets – Today, the term planet is defined as an object in orbit around a star. However, this ancient Greek word originally meant “wandering star”, because they appeared to shift amongst the stars of the zodiac constellations. ...
... Planets – Today, the term planet is defined as an object in orbit around a star. However, this ancient Greek word originally meant “wandering star”, because they appeared to shift amongst the stars of the zodiac constellations. ...
Nogami, D. - Subaru Telescope
... and the magnetic fields of a few kG are distributed in large regions on the stellar surface. ...
... and the magnetic fields of a few kG are distributed in large regions on the stellar surface. ...
Sun and Other Stars Notes
... -When all H is gone a star gets brighter and over 100 million years grows to a red giant and moves to the cooler position on the HR Diagram -The Sun grows to 8 times the mass of the Sun- (considered a high mass star) -What happens when the core becomes all Helium? -The Helium shell flashes causes it ...
... -When all H is gone a star gets brighter and over 100 million years grows to a red giant and moves to the cooler position on the HR Diagram -The Sun grows to 8 times the mass of the Sun- (considered a high mass star) -What happens when the core becomes all Helium? -The Helium shell flashes causes it ...
PHYSICS 1500 - The University of Sydney
... The illustration at left shows an artist’s impression of a ‘hot Jupiter’ – a giant planet in a very close orbit around its parent star. The first such planet discovered was 51 Pegasi b which takes 4.23 days to orbit a sun-like star. The system is about 50 light years from Earth. The planet was found ...
... The illustration at left shows an artist’s impression of a ‘hot Jupiter’ – a giant planet in a very close orbit around its parent star. The first such planet discovered was 51 Pegasi b which takes 4.23 days to orbit a sun-like star. The system is about 50 light years from Earth. The planet was found ...
dtu7ech01 - Fort Thomas Independent Schools
... Ancient constellations were imaginary pictures outlined by familiar patterns of stars. ...
... Ancient constellations were imaginary pictures outlined by familiar patterns of stars. ...
5-E Galaxy T - McDonald Observatory
... The Hubble Space Telescope has revealed a universe full of galaxies, and stunning detailed structures within nearby galaxies. A galaxy is a gravitationally bound system of stars, gas, and dust. They range in size from a few thousand light years to a few hundred thousand light-years in diameter for t ...
... The Hubble Space Telescope has revealed a universe full of galaxies, and stunning detailed structures within nearby galaxies. A galaxy is a gravitationally bound system of stars, gas, and dust. They range in size from a few thousand light years to a few hundred thousand light-years in diameter for t ...
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.