What have we learned?
... • What would it be like to visit a black hole? – You can orbit a black hole like any other object of the same mass—black holes don’t suck! – Near the event horizon, time slows down and tidal forces are very strong. ...
... • What would it be like to visit a black hole? – You can orbit a black hole like any other object of the same mass—black holes don’t suck! – Near the event horizon, time slows down and tidal forces are very strong. ...
May
... NGC4656 is a type SBm barred spiral galaxy in the constellation Canes Venatici (KAY-neez- vë-NAT-ih-si). Popularly known as the Hockey Stick Galaxy, the key features are the angled tilt of the disk and the apparent offset of the core. If observing at low magnification look in the same field of view ...
... NGC4656 is a type SBm barred spiral galaxy in the constellation Canes Venatici (KAY-neez- vë-NAT-ih-si). Popularly known as the Hockey Stick Galaxy, the key features are the angled tilt of the disk and the apparent offset of the core. If observing at low magnification look in the same field of view ...
Galaxies - C. Levesque
... - stellar explosion where a star becomes about a million times brighter ...
... - stellar explosion where a star becomes about a million times brighter ...
Slide 1
... hydrogen • Gravitational collapse forms protogalactic clouds • First stars are born in this spheroid (such stars are billions of years old “fossil record”) ...
... hydrogen • Gravitational collapse forms protogalactic clouds • First stars are born in this spheroid (such stars are billions of years old “fossil record”) ...
Astronomy 1020 Exam 4 Review Questions
... 19. What would the mass of a black hole be if its Schwarzschild radius was the same radius as the Sun? 20. What 3 observational characteristics do the best black hole candidates possess? What are the 4 best black hole candidates that have been observed? Of these 4, which is the best stellar black ho ...
... 19. What would the mass of a black hole be if its Schwarzschild radius was the same radius as the Sun? 20. What 3 observational characteristics do the best black hole candidates possess? What are the 4 best black hole candidates that have been observed? Of these 4, which is the best stellar black ho ...
Watching Galaxies Form Near the Beginning of Time
... Evidence for global winds escaping systems Exist in groupings with bright galaxies/AGN Are these the early units predicted by hierarchical schemes (and fitting dark-matter ...
... Evidence for global winds escaping systems Exist in groupings with bright galaxies/AGN Are these the early units predicted by hierarchical schemes (and fitting dark-matter ...
chapter 26 instructor notes
... These are a group of strongly interacting galaxies that are bluer in colour than isolated galaxies, presumably because of the presence of recently-created hot young stars. Larson and Tinsley (1972) argued that the tidal interaction with another galaxy has induced star formation, although the resulti ...
... These are a group of strongly interacting galaxies that are bluer in colour than isolated galaxies, presumably because of the presence of recently-created hot young stars. Larson and Tinsley (1972) argued that the tidal interaction with another galaxy has induced star formation, although the resulti ...
Quasars - Ann Arbor Earth Science
... emission, too intense to be produced by the normal processes of starbirth and stardeath. This may come only from the nucleus, or from a pair of more or less symmetric lobes stretching as far as a million light-years. Many show emission from jets connecting the nucleus to these lobes. Optical spectra ...
... emission, too intense to be produced by the normal processes of starbirth and stardeath. This may come only from the nucleus, or from a pair of more or less symmetric lobes stretching as far as a million light-years. Many show emission from jets connecting the nucleus to these lobes. Optical spectra ...
Messier 87
Messier 87 (also known as Virgo A or NGC 4486, and generally abbreviated to M87) is a supergiant elliptical galaxy in the constellation Virgo. One of the most massive galaxies in the local universe, it is notable for its large population of globular clusters—M87 contains about 12,000 compared to the 150-200 orbiting the Milky Way—and its jet of energetic plasma that originates at the core and extends outward at least 1,500 parsecs (4,900 light-years), travelling at relativistic speed. It is one of the brightest radio sources in the sky, and is a popular target for both amateur astronomy observations and professional astronomy study.French astronomer Charles Messier discovered M87 in 1781, cataloguing it as a nebulous feature while searching for objects that would confuse comet hunters. The second brightest galaxy within the northern Virgo Cluster, M87 is located about 16.4 million parsecs (53.5 million light-years) from Earth. Unlike a disk-shaped spiral galaxy, M87 has no distinctive dust lanes. Instead, it has an almost featureless, ellipsoidal shape typical of most giant elliptical galaxies, diminishing in luminosity with distance from the centre. Forming around one sixth of M87's mass, the stars in this galaxy have a nearly spherically symmetric distribution, their density decreasing with increasing distance from the core. At the core is a supermassive black hole, which forms the primary component of an active galactic nucleus. This object is a strong source of multiwavelength radiation, particularly radio waves. M87's galactic envelope extends out to a radius of about 150 kiloparsecs (490,000 light-years), where it has been truncated—possibly by an encounter with another galaxy. Between the stars is a diffuse interstellar medium of gas that has been chemically enriched by elements emitted from evolved stars.