How many stars are in the Milky Way Galaxy?
... 1: Draw and label diagrams of the Milky Way from top and side views, showing the major components. Indicate the approximate dimensions of the components and note the location of the Sun in each diagram. 2: Describe the galactic distribution of general interstellar material, nebulae, and open and glo ...
... 1: Draw and label diagrams of the Milky Way from top and side views, showing the major components. Indicate the approximate dimensions of the components and note the location of the Sun in each diagram. 2: Describe the galactic distribution of general interstellar material, nebulae, and open and glo ...
The Milky Way Galaxy
... Shapley’s model Globular clusters must orbit around the center of mass of the galaxy! Thus, assuming the clusters are distributed uniformly around the galaxy, he measured the 3D distribution of clusters (using Cepheid variables) and then assumed that the center of that distribution was where the cen ...
... Shapley’s model Globular clusters must orbit around the center of mass of the galaxy! Thus, assuming the clusters are distributed uniformly around the galaxy, he measured the 3D distribution of clusters (using Cepheid variables) and then assumed that the center of that distribution was where the cen ...
Unit 1
... • A. They are grouped into clusters that in turn are grouped into clusters of clusters (superclusters) • B. Galaxies are spread more or less evenly throughout the Universe • C. They are grouped around our galaxy • D. none of the above ...
... • A. They are grouped into clusters that in turn are grouped into clusters of clusters (superclusters) • B. Galaxies are spread more or less evenly throughout the Universe • C. They are grouped around our galaxy • D. none of the above ...
The universe
... Planets around the sun and the surrounding planets revolve around the center of the galaxy (Milky Way). ...
... Planets around the sun and the surrounding planets revolve around the center of the galaxy (Milky Way). ...
The Milky Way Galaxy
... Why it’s important Components of the Galaxy Nearby stars Interstellar gas The bar The Galactic centre Globular clusters Star streams The dark halo ...
... Why it’s important Components of the Galaxy Nearby stars Interstellar gas The bar The Galactic centre Globular clusters Star streams The dark halo ...
Our Sun - STEMpire Central
... 4. These stars appear to blink with X rays on and off very rapidly (many times a second), like a lighthouse. a) Cepheid Variables b) RR Lyrae Varibles c) Red Giants d) Pulsars 5. The correct order for spectral classification is: A) LMFAOJK B) OMGROFL C) OBAMKGF D) OBAFGKM 6. More massive stars can ...
... 4. These stars appear to blink with X rays on and off very rapidly (many times a second), like a lighthouse. a) Cepheid Variables b) RR Lyrae Varibles c) Red Giants d) Pulsars 5. The correct order for spectral classification is: A) LMFAOJK B) OMGROFL C) OBAMKGF D) OBAFGKM 6. More massive stars can ...
Galaxies Quiz – Study Guide KEY You will be given a set of images
... h. What force holds galaxies together? __GRAVITY___ i. ...
... h. What force holds galaxies together? __GRAVITY___ i. ...
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.