Review: How does a star`s mass determine its life story?
... What would it be like to visit a black hole? • You could orbit a black hole just like any other object of the same mass. However, you’d see strange effects for an object falling toward the black hole: – Time would seem to run slowly for the object – Its light would be increasingly redshifted as it a ...
... What would it be like to visit a black hole? • You could orbit a black hole just like any other object of the same mass. However, you’d see strange effects for an object falling toward the black hole: – Time would seem to run slowly for the object – Its light would be increasingly redshifted as it a ...
Stars and Constellations Power Point
... a velocity of about 300,000 kilometers (km) each second; how far would it move in a year? About 10 trillion km (or about 6 trillion miles). ...
... a velocity of about 300,000 kilometers (km) each second; how far would it move in a year? About 10 trillion km (or about 6 trillion miles). ...
Astron 104 Laboratory #11 The Scale of the Milky Way
... galaxies. From question 9, we saw that the Andromeda Galaxy was about 2,500,000 ltyr from us. On the picture, this spot would be 250 cm (about two and a half meter sticks) away from the dot representing the Sun. The nearest group of galaxies to us (not counting our own Local Group) is the Virgo Clus ...
... galaxies. From question 9, we saw that the Andromeda Galaxy was about 2,500,000 ltyr from us. On the picture, this spot would be 250 cm (about two and a half meter sticks) away from the dot representing the Sun. The nearest group of galaxies to us (not counting our own Local Group) is the Virgo Clus ...
Burst Oscillations and Nonradial Modes on Neutron Stars
... Important differences: • Non-pulsars only show oscillations in short (~ 2-10 s) bursts, while pulsars have shown oscillations in longer bursts (~ 100 s) • Non-pulsars show frequency drifts often late into cooling tail, while pulsars show no frequency evolution after burst peak • Non-pulsars have hig ...
... Important differences: • Non-pulsars only show oscillations in short (~ 2-10 s) bursts, while pulsars have shown oscillations in longer bursts (~ 100 s) • Non-pulsars show frequency drifts often late into cooling tail, while pulsars show no frequency evolution after burst peak • Non-pulsars have hig ...
UNIT VIII/B: THE EARTH IN SPACE – STARS AND GALAXIES
... *Elliptical galaxies, the most abundant type, which have an elliptical shape that ranges to nearly spherical, and lack spiral arms *Irregular galaxies, which lack symmetry and account for only 10 percent of the known galaxies. d. Galaxies are not randomly distributed throughout the universe. They ar ...
... *Elliptical galaxies, the most abundant type, which have an elliptical shape that ranges to nearly spherical, and lack spiral arms *Irregular galaxies, which lack symmetry and account for only 10 percent of the known galaxies. d. Galaxies are not randomly distributed throughout the universe. They ar ...
Neutron Stars - Otterbein University
... • Nearby gravity becomes so strong that nothing – not even light – can escape! • The edge of the region from which nothing can escape is called the event horizon – Radius of the event horizon called the Schwarzschild ...
... • Nearby gravity becomes so strong that nothing – not even light – can escape! • The edge of the region from which nothing can escape is called the event horizon – Radius of the event horizon called the Schwarzschild ...
Origins of the Universe - Fraser Heights Chess Club
... completely and gravity becomes so strong that nothing, not even light, can escape. • Einstein’s Theory of Gravity predicted the possibility of black holes, but no one believed they actually existed. • Today NASA space telescopes have discovered evidence for black holes throughout the universe. ...
... completely and gravity becomes so strong that nothing, not even light, can escape. • Einstein’s Theory of Gravity predicted the possibility of black holes, but no one believed they actually existed. • Today NASA space telescopes have discovered evidence for black holes throughout the universe. ...
Scattering (and the blue sky)
... When the ISM passes through it, it gets compressed, and star formation is enhanced. This makes bright hot young stars, and the pattern stands out. ...
... When the ISM passes through it, it gets compressed, and star formation is enhanced. This makes bright hot young stars, and the pattern stands out. ...
characteristics of stars
... Our galaxy is called the Milky Way because when we view it, it looks like __________ __________. There are at least _____ billion stars in our galaxy. The Milky Way is _________ - shaped. The sun is located near the ______ of the disk. In the central bulge, the stars are so numerous that they appear ...
... Our galaxy is called the Milky Way because when we view it, it looks like __________ __________. There are at least _____ billion stars in our galaxy. The Milky Way is _________ - shaped. The sun is located near the ______ of the disk. In the central bulge, the stars are so numerous that they appear ...
SAMPLE TEST: Stars and Galaxies Multiple Choice Identify the letter
... 47. The most basic way to measure the distance to a star is ____________________. 48. A light-year is the distance ____________________ travels in a year. 49. Apparent magnitude refers to a star’s ____________________ as it appears from ____________________. 50. Some stars, called _________________ ...
... 47. The most basic way to measure the distance to a star is ____________________. 48. A light-year is the distance ____________________ travels in a year. 49. Apparent magnitude refers to a star’s ____________________ as it appears from ____________________. 50. Some stars, called _________________ ...
Astronomy 242: Review Questions #1 Distributed: February 10
... 13. Sketch Hubble’s classification system for luminous galaxies, and briefly describe the criteria used classify galaxies. How do key properties like ISM makeup and star formation change along the Hubble sequence? 14. Two years ago, an undergraduate class at University College London discovered Sup ...
... 13. Sketch Hubble’s classification system for luminous galaxies, and briefly describe the criteria used classify galaxies. How do key properties like ISM makeup and star formation change along the Hubble sequence? 14. Two years ago, an undergraduate class at University College London discovered Sup ...
Radio-quiet Isolated Neutron Stars
... Detected in the RASS between 1990/09/14~1990/10/02. Identified with the 1992/10/16 PSPC data. No variability at levels greater than ~1% in 1hr, or <30% on timescale up to 15 years. ...
... Detected in the RASS between 1990/09/14~1990/10/02. Identified with the 1992/10/16 PSPC data. No variability at levels greater than ~1% in 1hr, or <30% on timescale up to 15 years. ...
Cosmic future of nuclear and particle physics
... Apart from neutrinos, Earth is bombarded from space by an other kind of stable particles: electrons, protons and nuclei, as well as their antiparticles. Together with hard photons they are often called cosmic rays. They usually interact in the atmosphere and create cosmic showers. One can easily det ...
... Apart from neutrinos, Earth is bombarded from space by an other kind of stable particles: electrons, protons and nuclei, as well as their antiparticles. Together with hard photons they are often called cosmic rays. They usually interact in the atmosphere and create cosmic showers. One can easily det ...
Neutron Stars and Black Holes
... 19. Some X-ray novae emit bursts of energy and others do not. In addition, those with energy bursts are about 100 times as luminous as those without bursts. What type of compact objects are responsible for these two types of X-ray novae? a. Those with bursts contain black holes and those without bur ...
... 19. Some X-ray novae emit bursts of energy and others do not. In addition, those with energy bursts are about 100 times as luminous as those without bursts. What type of compact objects are responsible for these two types of X-ray novae? a. Those with bursts contain black holes and those without bur ...
A Universe of Galaxies - Pennsylvania State University
... What can outshine ~1000 supernovae for millions of years, and be just slightly larger than our Solar System? Theoretically, not much – only a very, very big black hole. • Start with a black hole with a mass of 10,000,000,000 Mʘ • Have a star come close enough to be tidally disrupted • Have the mater ...
... What can outshine ~1000 supernovae for millions of years, and be just slightly larger than our Solar System? Theoretically, not much – only a very, very big black hole. • Start with a black hole with a mass of 10,000,000,000 Mʘ • Have a star come close enough to be tidally disrupted • Have the mater ...
Published by the Association Pro ISSI No. 37, May 2016
... Fig. 2: Star nursery in the Great Nebula in Orion. Also known as M42, it is one of the most famous nebulae in the sky, about 1,500 light-years away. In the star forming region’s glowing gas clouds many hot young stars can be seen. Within this well-studied stellar nursery, astronomers have identified ...
... Fig. 2: Star nursery in the Great Nebula in Orion. Also known as M42, it is one of the most famous nebulae in the sky, about 1,500 light-years away. In the star forming region’s glowing gas clouds many hot young stars can be seen. Within this well-studied stellar nursery, astronomers have identified ...
Galaxies – Island universes
... cluster. If they’re big enough to identify as having eaten several galaxies, we call them “central dominant” or “cannibal galaxies” … ...
... cluster. If they’re big enough to identify as having eaten several galaxies, we call them “central dominant” or “cannibal galaxies” … ...
Document
... • For any star in the sky, we KNOW: – Apparent Magnitude (m) – Spectral Type (O, B, A, F, G, K, M) – Luminosity Class (Main Sequence, Giant, etc…). These are denoted by a roman numeral (V, III, I,…). ...
... • For any star in the sky, we KNOW: – Apparent Magnitude (m) – Spectral Type (O, B, A, F, G, K, M) – Luminosity Class (Main Sequence, Giant, etc…). These are denoted by a roman numeral (V, III, I,…). ...
Black Holes, Part 9, Star Eaters
... the UV band, into the hard-x-rays band. The extreme energy emission takes the resulting spectrum far outside the visible band. ...
... the UV band, into the hard-x-rays band. The extreme energy emission takes the resulting spectrum far outside the visible band. ...
Document
... In 1932, Karl Jansky discovered that the MW produced a broad range of radio emission. Later in 1951, several groups detected the 21-cm hyperfine transition of atomic hydrogen which allowed for precise line-of-sight velocities to be determined without the hindrance of dust absorption. •Gas is confin ...
... In 1932, Karl Jansky discovered that the MW produced a broad range of radio emission. Later in 1951, several groups detected the 21-cm hyperfine transition of atomic hydrogen which allowed for precise line-of-sight velocities to be determined without the hindrance of dust absorption. •Gas is confin ...
Unit 1
... • In the 1700’s, Charles Messier was observing comets, and kept finding objects that while fuzzy, were not comets – He made a list (or catalog) of these undesired objects, so he could avoid seeing them – They became known as Messier Objects, a number preceded by an M. – M31 (the Andromeda galaxy) is ...
... • In the 1700’s, Charles Messier was observing comets, and kept finding objects that while fuzzy, were not comets – He made a list (or catalog) of these undesired objects, so he could avoid seeing them – They became known as Messier Objects, a number preceded by an M. – M31 (the Andromeda galaxy) is ...
Deep Space Mystery Note Form 2
... During this short interval, a supernova can radiate as much energy as our Sun could emit over its life span. The explosion expels much or all of the star’s material and causes a shock wave into the surrounding interstellar medium. The interstellar medium is the gas and dust that exists between the s ...
... During this short interval, a supernova can radiate as much energy as our Sun could emit over its life span. The explosion expels much or all of the star’s material and causes a shock wave into the surrounding interstellar medium. The interstellar medium is the gas and dust that exists between the s ...
Gamma-ray burst
Gamma-ray bursts (GRBs) are flashes of gamma rays associated with extremely energetic explosions that have been observed in distant galaxies. They are the brightest electromagnetic events known to occur in the universe. Bursts can last from ten milliseconds to several hours. The initial burst is usually followed by a longer-lived ""afterglow"" emitted at longer wavelengths (X-ray, ultraviolet, optical, infrared, microwave and radio).Most observed GRBs are believed to consist of a narrow beam of intense radiation released during a supernova or hypernova as a rapidly rotating, high-mass star collapses to form a neutron star, quark star, or black hole. A subclass of GRBs (the ""short"" bursts) appear to originate from a different process – this may be due to the merger of binary neutron stars. The cause of the precursor burst observed in some of these short events may be due to the development of a resonance between the crust and core of such stars as a result of the massive tidal forces experienced in the seconds leading up to their collision, causing the entire crust of the star to shatter.The sources of most GRBs are billions of light years away from Earth, implying that the explosions are both extremely energetic (a typical burst releases as much energy in a few seconds as the Sun will in its entire 10-billion-year lifetime) and extremely rare (a few per galaxy per million years). All observed GRBs have originated from outside the Milky Way galaxy, although a related class of phenomena, soft gamma repeater flares, are associated with magnetars within the Milky Way. It has been hypothesized that a gamma-ray burst in the Milky Way, pointing directly towards the Earth, could cause a mass extinction event.GRBs were first detected in 1967 by the Vela satellites, a series of satellites designed to detect covert nuclear weapons tests. Hundreds of theoretical models were proposed to explain these bursts in the years following their discovery, such as collisions between comets and neutron stars. Little information was available to verify these models until the 1997 detection of the first X-ray and optical afterglows and direct measurement of their redshifts using optical spectroscopy, and thus their distances and energy outputs. These discoveries, and subsequent studies of the galaxies and supernovae associated with the bursts, clarified the distance and luminosity of GRBs. These facts definitively placed them in distant galaxies and also connected long GRBs with the explosion of massive stars, the only possible source for the energy outputs observed.