Galaxies Powerpoint
... gas, and dust in space that are held together by gravity. • The largest galaxies contain more than a trillion stars. Smaller galaxies may have only a few million. • Scientists estimate the number of stars from the size and brightness of the galaxy. ...
... gas, and dust in space that are held together by gravity. • The largest galaxies contain more than a trillion stars. Smaller galaxies may have only a few million. • Scientists estimate the number of stars from the size and brightness of the galaxy. ...
Universe and Galaxy Short Study Guide
... Black holes in the centers of giant galaxies—some more than one billion solar masses—had enough infalling gas to once blaze as quasars. The final mass of a black hole is not primordial, but instead is determined during the galaxy formation process. This shows that there is a close relationship betwe ...
... Black holes in the centers of giant galaxies—some more than one billion solar masses—had enough infalling gas to once blaze as quasars. The final mass of a black hole is not primordial, but instead is determined during the galaxy formation process. This shows that there is a close relationship betwe ...
1_Introduction
... move around the Galaxy’s center? Blue dot = Sun Red dot = Galaxy center Distance to Galaxy center ...
... move around the Galaxy’s center? Blue dot = Sun Red dot = Galaxy center Distance to Galaxy center ...
ppt
... Shapley argued for nebulae all being local (i.e. within the Milky Way, like the Orion Nebula). Curtis argued for “island universe” hypothesis (i.e., there are many islands of stars like the Milky Way in the universe). ...
... Shapley argued for nebulae all being local (i.e. within the Milky Way, like the Orion Nebula). Curtis argued for “island universe” hypothesis (i.e., there are many islands of stars like the Milky Way in the universe). ...
PHYS-4240 — General Relativity ASTR-4240 — Gravitation & Cosmology Spring, 2016 Class 1
... Milky Way (aka “the Galaxy”) reside in several different structural components. The Sun lies in a thin disk of stars and gas which orbit the center of the Galaxy and extend to several tens of kiloparsecs1 from the Galactic center. In this exercise we will model the thin disk as an infinite sheet of ...
... Milky Way (aka “the Galaxy”) reside in several different structural components. The Sun lies in a thin disk of stars and gas which orbit the center of the Galaxy and extend to several tens of kiloparsecs1 from the Galactic center. In this exercise we will model the thin disk as an infinite sheet of ...
Word
... #3. The giant elliptical galaxy M87 has an accretion disk of material orbiting its central black hole. The Hubble Space Telescope observed the spectrum of this material and, from the Doppler shifts of the spectral lines, found that the material is orbiting at 550 km/sec at a distance of 40 pc from t ...
... #3. The giant elliptical galaxy M87 has an accretion disk of material orbiting its central black hole. The Hubble Space Telescope observed the spectrum of this material and, from the Doppler shifts of the spectral lines, found that the material is orbiting at 550 km/sec at a distance of 40 pc from t ...
HOMEWORK #1
... #3. The giant elliptical galaxy M87 has an accretion disk of material orbiting its central black hole. The Hubble Space Telescope observed the spectrum of this material and, from the Doppler shifts of the spectral lines, found that the material is orbiting at 550 km/sec at a distance of 40 pc from t ...
... #3. The giant elliptical galaxy M87 has an accretion disk of material orbiting its central black hole. The Hubble Space Telescope observed the spectrum of this material and, from the Doppler shifts of the spectral lines, found that the material is orbiting at 550 km/sec at a distance of 40 pc from t ...
Section 4 Galaxies and the Universe
... A. Galaxy—gravity holds together a large collection of stars, gas, and dust 1. Earth’s galaxy is Milky Way which is part of a galaxy cluster named the Local Group 2. Spiral galaxies—spiral arms wind out from inner section; some have barred spirals with stars and gas in a central bar 3. Elliptical ga ...
... A. Galaxy—gravity holds together a large collection of stars, gas, and dust 1. Earth’s galaxy is Milky Way which is part of a galaxy cluster named the Local Group 2. Spiral galaxies—spiral arms wind out from inner section; some have barred spirals with stars and gas in a central bar 3. Elliptical ga ...
Astronomy – The Milky Way Galaxy
... __________________ Galaxy is comparable in size, though slightly larger. ...
... __________________ Galaxy is comparable in size, though slightly larger. ...
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.