... • Beyond the Milky Way are billions of other galaxies • Some galaxies are spiral like the Milky Way while others are egg-shaped or completely irregular in appearance • Besides shape, galaxies vary greatly in the star, gas, and dust content and some are more “active” than others • Galaxies tend to cl ...
21. Galaxy Evolution Agenda The Monty Hall Problem/Paradox 21.1
... momentum tends to shape a collapsing gas cloud into a spinning disk. Thus, ellipticals may have formed from protogalactic clouds with relatively small amounts of angular momentum, while the clouds that formed spirals had greater angular momentum. (2) Dense clouds tend to cool and form stars more rap ...
... momentum tends to shape a collapsing gas cloud into a spinning disk. Thus, ellipticals may have formed from protogalactic clouds with relatively small amounts of angular momentum, while the clouds that formed spirals had greater angular momentum. (2) Dense clouds tend to cool and form stars more rap ...
Goal: To understand clusters of stars
... old. • And the cluster is moving by us at 46 km/s. • 46 km/s = 1 light year per 6000 years ...
... old. • And the cluster is moving by us at 46 km/s. • 46 km/s = 1 light year per 6000 years ...
Goal: To understand clusters of stars
... old. • And the cluster is moving by us at 46 km/s. • 46 km/s = 1 light year per 6000 years ...
... old. • And the cluster is moving by us at 46 km/s. • 46 km/s = 1 light year per 6000 years ...
Ch17_Galaxies
... • Beyond the Milky Way are billions of other galaxies • Some galaxies are spiral like the Milky Way while others are egg-shaped or completely irregular in appearance • Besides shape, galaxies vary greatly in the star, gas, and dust content and some are more “active” than others • Galaxies tend to cl ...
... • Beyond the Milky Way are billions of other galaxies • Some galaxies are spiral like the Milky Way while others are egg-shaped or completely irregular in appearance • Besides shape, galaxies vary greatly in the star, gas, and dust content and some are more “active” than others • Galaxies tend to cl ...
Galaxies
... compare the space between the galaxies to their sizes we find that, on the average, they are separated by about 10 to 100 times of their diameter. Hence, there would be a large number of collisions. Large telescopes reveal hundreds of galaxies that appear to be colliding with other galaxies. One of ...
... compare the space between the galaxies to their sizes we find that, on the average, they are separated by about 10 to 100 times of their diameter. Hence, there would be a large number of collisions. Large telescopes reveal hundreds of galaxies that appear to be colliding with other galaxies. One of ...
Chapter 16
... The preceding chapter was about our Milky Way Galaxy, an important object to us but only one of the many billions of galaxies visible in the sky. We can no more understand galaxies by understanding a single example, the Milky Way, than we could understand humanity by understanding a single person. T ...
... The preceding chapter was about our Milky Way Galaxy, an important object to us but only one of the many billions of galaxies visible in the sky. We can no more understand galaxies by understanding a single example, the Milky Way, than we could understand humanity by understanding a single person. T ...
Star formation in galaxies over the last 10 billion
... Two immediate results: I. Galaxies formed at some point in the distant past II. Galaxies evolved with time ...
... Two immediate results: I. Galaxies formed at some point in the distant past II. Galaxies evolved with time ...
flare swg usa
... Many protostars are clustered within a single “core” as typically A filament seen at 70-160-250 filament as seen with Spitzer (24-8-3.5) defined by the large beam of Herschel observations. Á ...
... Many protostars are clustered within a single “core” as typically A filament seen at 70-160-250 filament as seen with Spitzer (24-8-3.5) defined by the large beam of Herschel observations. Á ...
December - Rose City Astronomers
... The left image is an annotated DSS image showing NGC 4319, NGC 4291 and Markarian 205 in relation to each other. On the right is my processed sketch from the Oregon Star Party showing the same field. Research is unsure exactly what this star-like object is – it’s either a compact companion galaxy or ...
... The left image is an annotated DSS image showing NGC 4319, NGC 4291 and Markarian 205 in relation to each other. On the right is my processed sketch from the Oregon Star Party showing the same field. Research is unsure exactly what this star-like object is – it’s either a compact companion galaxy or ...
Part1
... observations. o In reverse: the effect of metallicity on the ISM and star formation is of considerable interest. This relation allows one to readily guess metallicity from mass. ...
... observations. o In reverse: the effect of metallicity on the ISM and star formation is of considerable interest. This relation allows one to readily guess metallicity from mass. ...
PH607lec12-3gal1
... Hubble tuning fork, having characteristics "beyond" those of class Sc - high gas content, dominant presence of a young population. Irr I galaxies may show bar-like structures and incipient spiral structure like the Large Magellanic ...
... Hubble tuning fork, having characteristics "beyond" those of class Sc - high gas content, dominant presence of a young population. Irr I galaxies may show bar-like structures and incipient spiral structure like the Large Magellanic ...
Supermassive Black Holes in Inactive Galaxies Encyclopedia of Astronomy & Astrophysics eaa.iop.org
... M31 is the highest-luminosity galaxy in the LOCAL GROUP. At a distance of 0.77 Mpc, it is the nearest giant galaxy outside our own. It can therefore be studied in unusual detail. M31 contains the nearest example of a nuclear star cluster embedded in a normal bulge. When examined with HST, the nucleu ...
... M31 is the highest-luminosity galaxy in the LOCAL GROUP. At a distance of 0.77 Mpc, it is the nearest giant galaxy outside our own. It can therefore be studied in unusual detail. M31 contains the nearest example of a nuclear star cluster embedded in a normal bulge. When examined with HST, the nucleu ...
PH607lec12
... relatively short amount of time. Perhaps there are stabilizing forces, such as the galaxies' angular momentum and the large halos of dark matter that surround them, that help galaxies regain their orderly spiral structure after a merger. ...
... relatively short amount of time. Perhaps there are stabilizing forces, such as the galaxies' angular momentum and the large halos of dark matter that surround them, that help galaxies regain their orderly spiral structure after a merger. ...
Document
... the outer part of the halo extends much farther, out to perhaps 200,000 or 300,000 light-years. Believe it or not, this Galactic outer halo apparently contains 5 or 10 times as much mass as the nucleus, disk, and inner halo together—but we don’t know what it consists of! We shall see in Section 16.4 ...
... the outer part of the halo extends much farther, out to perhaps 200,000 or 300,000 light-years. Believe it or not, this Galactic outer halo apparently contains 5 or 10 times as much mass as the nucleus, disk, and inner halo together—but we don’t know what it consists of! We shall see in Section 16.4 ...
Andromeda Galaxy
The Andromeda Galaxy (/ænˈdrɒmɨdə/), also known as Messier 31, M31, or NGC 224, is a spiral galaxy approximately 780 kiloparsecs (2.5 million light-years) from Earth. It is the nearest major galaxy to the Milky Way and was often referred to as the Great Andromeda Nebula in older texts. It received its name from the area of the sky in which it appears, the constellation of Andromeda, which was named after the mythological princess Andromeda. Being approximately 220,000 light years across, it is the largest galaxy of the Local Group, which also contains the Milky Way, the Triangulum Galaxy, and about 44 other smaller galaxies.The Andromeda Galaxy is the most massive galaxy in the Local Group as well. Despite earlier findings that suggested that the Milky Way contains more dark matter and could be the most massive in the grouping, the 2006 observations by the Spitzer Space Telescope revealed that Andromeda contains one trillion (1012) stars: at least twice the number of stars in the Milky Way, which is estimated to be 200–400 billion.The Andromeda Galaxy is estimated to be 1.5×1012 solar masses, while the mass of the Milky Way is estimated to be 8.5×1011 solar masses. In comparison, a 2009 study estimated that the Milky Way and M31 are about equal in mass, while a 2006 study put the mass of the Milky Way at ~80% of the mass of the Andromeda Galaxy. The Milky Way and Andromeda are expected to collide in 3.75 billion years, eventually merging to form a giant elliptical galaxy or perhaps a large disk galaxy.At 3.4, the apparent magnitude of the Andromeda Galaxy is one of the brightest of any of the Messier objects, making it visible to the naked eye on moonless nights even when viewed from areas with moderate light pollution. Although it appears more than six times as wide as the full Moon when photographed through a larger telescope, only the brighter central region is visible to the naked eye or when viewed using binoculars or a small telescope and would it hence appear to be but another star.