DTU_9e_ch15
... The Shapley–Curtis debate was the first major public discussion between astronomers as to whether the Milky Way contains all the stars in the universe. Cepheid variable stars are important in determining the distance to other galaxies. Edwin Hubble proved that there are other galaxies far outside of ...
... The Shapley–Curtis debate was the first major public discussion between astronomers as to whether the Milky Way contains all the stars in the universe. Cepheid variable stars are important in determining the distance to other galaxies. Edwin Hubble proved that there are other galaxies far outside of ...
AST1001.ch15
... white-dwarf supernova tells us the distance to its galaxy (up to 10 billion lightyears). ...
... white-dwarf supernova tells us the distance to its galaxy (up to 10 billion lightyears). ...
Today`s Powerpoint
... - contains globular clusters, old stars, little gas and dust, much "dark matter" - roughly spherical ...
... - contains globular clusters, old stars, little gas and dust, much "dark matter" - roughly spherical ...
Multiwavelength Astronomy - RIT Center for Imaging Science
... • Probe of cosmic “collisions” that produce plasma at temperatures in excess of 1,000,000 K – Example: gas ejected at high speed from a rapidly dying star hits gas that was ejected more slowly by the same star => gas heated to X-ray-emitting temperatures – Most stars, especially young stars, have a ...
... • Probe of cosmic “collisions” that produce plasma at temperatures in excess of 1,000,000 K – Example: gas ejected at high speed from a rapidly dying star hits gas that was ejected more slowly by the same star => gas heated to X-ray-emitting temperatures – Most stars, especially young stars, have a ...
The Galaxies
... with a speed proportional to distance, there must have been a beginning, when everything was concentrated in one single point: ...
... with a speed proportional to distance, there must have been a beginning, when everything was concentrated in one single point: ...
The Milky Way - Cobb Learning
... If all mass were concentrated in the center, the rotation curve would follow a modified version of Kepler’s 3rd law ...
... If all mass were concentrated in the center, the rotation curve would follow a modified version of Kepler’s 3rd law ...
The resolved stellar populations of M32 Monachesi, Antonela
... detail how we obtained the most detailed CMD of this galaxy yet constructed to date. Our field has an extent of 2900 × 2600 and it is located at 20 from the galactic center. We find that this CMD has a wealth of features that reveal the different stellar populations present in M32. With the aid of e ...
... detail how we obtained the most detailed CMD of this galaxy yet constructed to date. Our field has an extent of 2900 × 2600 and it is located at 20 from the galactic center. We find that this CMD has a wealth of features that reveal the different stellar populations present in M32. With the aid of e ...
The Night Sky May 2016 - Bridgend Astronomical Society
... lie within its boundaries. Spica is, in fact, an exceedingly close double star with the two B type stars orbiting each other every 4 days. Their total luminosity is 2000 times that of our Sun. In the upper right hand quadrant of Virgo lies the centre of the Virgo Cluster of galaxies. There are 13 ga ...
... lie within its boundaries. Spica is, in fact, an exceedingly close double star with the two B type stars orbiting each other every 4 days. Their total luminosity is 2000 times that of our Sun. In the upper right hand quadrant of Virgo lies the centre of the Virgo Cluster of galaxies. There are 13 ga ...
V: 0
... Spiral galaxies are so-named because of the graceful shapes of arms emanating from a bright central nucleus. ...
... Spiral galaxies are so-named because of the graceful shapes of arms emanating from a bright central nucleus. ...
M101: The Pinwheel Galaxy
... like Messier 101 (M101) shown in this Hubble Space Telescope image, lasted billions of years. This photograph of M101, nicknamed the Pinwheel Galaxy, showcases a spiral galaxy’s well-known features. A galaxy is a collection of stars, gas, and dust held together by gravity. Galaxies come in three dif ...
... like Messier 101 (M101) shown in this Hubble Space Telescope image, lasted billions of years. This photograph of M101, nicknamed the Pinwheel Galaxy, showcases a spiral galaxy’s well-known features. A galaxy is a collection of stars, gas, and dust held together by gravity. Galaxies come in three dif ...
1 Is the Binding Energy of Galaxies related to their Core
... It is by now well established that most large galaxies (spiral, elliptical, etc.) host a supermassive black hole in their centre [1]. Again AGN’s, quasars, etc. are powered by the gravitational energy of matter accreting on to these central supermassive black holes [2]. These black hole masses are t ...
... It is by now well established that most large galaxies (spiral, elliptical, etc.) host a supermassive black hole in their centre [1]. Again AGN’s, quasars, etc. are powered by the gravitational energy of matter accreting on to these central supermassive black holes [2]. These black hole masses are t ...
the galaxy in which we live - Cosmos
... what we know as the Solar System. Our Solar System together with billions of other stars, planets, gas, dust, radiation, and invisible material (dark matter), are gravitationally bound forming a much larger structure: our Milky Way Galaxy. There are huge numbers of galaxies apart from our own, const ...
... what we know as the Solar System. Our Solar System together with billions of other stars, planets, gas, dust, radiation, and invisible material (dark matter), are gravitationally bound forming a much larger structure: our Milky Way Galaxy. There are huge numbers of galaxies apart from our own, const ...
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.