Elliptical galaxy

An elliptical galaxy is a type of galaxy with an approximately ellipsoidal shape and a smooth, nearly featureless image. They are one of the three main classes of galaxy described by Edwin Hubble in his Hubble sequence and 1936 work The Realm of the Nebulae, along with spiral and lenticular galaxies. Elliptical (E) galaxies are, together with lenticular galaxies (S0) with their large-scale. Most Galaxies are elliptical or spiral. The more numerous elliptical galaxies are thought to have resulted from numerous galactic collisions. A likely outcome of the collision of two spiral galaxies of similar size is an elliptical galaxy. In general, elliptical galaxies grow to larger sizes than their spiral counterparts and have lower gas content An elliptical galaxy, full of dark lanes of gas, likely formed in the merger of two other galaxies. Elliptical galaxies host less (or no) star birth than spiral galaxies like the Milky Way Elliptical galaxies are shaped like ellipses (stretched circles). They are divided into eight types: E0-E7 depending on how elliptical they are. E0 ellipticals are nearly circular, while E7s are very stretched out. Elliptical galaxies are made up of mostly old stars, and do not have much gas and dust Ellipticals are one of three main classes of galaxies defined by American astronomer Edwin Hubble in 1936. Unlike the other two classes—spirals and lenticulars—ellipticals have almost no.

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Elliptical Galaxy. Elliptical galaxies have an even, ellipsoidal shape. They typically contain a much greater proportion of older stars than spiral galaxies do. Four classes are used to classify galaxies: spiral; barred spiral; elliptical and irregular. Elliptical galaxies have a smooth ellipsoidal or spherical appearance, and they have far less structure than spiral galaxies do Instead of spiral arms, elliptical galaxies are just big clumps of stars. There is very little gas and dust. Because there is not much gas and dust, there's not enough material to make new stars. In general, the stars in elliptical galaxies are old, red stars. These galaxies look the same from all angles, too the formation of elliptical galaxies, elucidated most clearly by Larson (1969, 1974a,b, 1975; Larson & Tinsley 1974): the monolithic col-lapse of an initial gas cloud that collapses and forms stars along the way. These mod-els were motivated by the observations that elliptical galaxies are basically old, smoot

elliptical galaxy. n. A galaxy with an elliptical shape, containing relatively little gas and dust and having older stellar populations as compared to spiral galaxies. American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company In galaxy: Elliptical galaxies. These systems exhibit certain characteristic properties. They have complete rotational symmetry; i.e., they are figures of revolution with two equal principal axes. They have a third smaller axis that is the presumed axis of rotation. The surface brightness of ellipticals at optical wavelengths Read More; cosmolog

Definition of elliptical galaxy. : a galaxy that has a generally elliptical shape and that has no apparent internal structure or spiral arms. — called also elliptical. — compare spiral galaxy The brightest member galaxy is the elliptical galaxy NGC 4696 (~11m). أشد مجرة في ذلك التجمع لمعانا المجرة الحلزونية NGC 4696 ذات قدر ظاهري ~11. NGC 2276 has an asymmetrical appearance, most likely caused by gravitational interactions with its neighbor, elliptical galaxy NGC 2300 An elliptical galaxy is a type of galaxy having an approximately ellipsoidal shape and a smooth, nearly featureless brightness profile. Unlike flat spiral ga..

Elliptical Galaxy - an overview ScienceDirect Topic

Elliptical galaxies are usually found in the most violent places in the Universe, like at the heart of galaxy clusters and in compact groups of galaxies. In these places, elliptical galaxies have. More information and download options: http://esahubble.org/videos/wordbank_elliptical-galaxy/Credit:ESA/Hubble, NASA, ESA, R.M. Crockett (University of Oxfo.. giant elliptical galaxy NGC 1700 plotted both vs. the projected distance to the center, R, and vs. R 1/4. Photometry of elliptical galaxies The figure shows that an R 1/4 profile would fit the data very well over some 2 decades in radius An elliptical galaxy is a type of galaxy with an approximately ellipsoidal shape and a smooth, nearly featureless image. They are one of the three main classes of galaxy described by Edwin Hubble in his Hubble sequence and 1936 work The Realm of the Nebulae , [1] along with spiral and lenticular galaxies

The elliptical galaxy is one of the most intriguing parts of our universe. They have the most variation in size of any type of galaxy, as they can be very large, or extremely small, with some of them being less than 10% of the size of our galaxy, the Milky Way.This is due to less gas and dust, which results in fewer stars and a smaller galaxy Elliptical Galaxy. Elliptical galaxies are rounded, featureless collections of old stars that contain very little gas and dust. They come in a range of different sizes and shapes, and can appear circular (as shown here), oval or even rugby-ball shaped. Ellipticals are classified according to how squashed they look

Elliptical Galaxies. Elliptical galaxies are also named because of their shapes. Elliptical galaxies range from circular (remember, a circle is an ellipse!) to long, narrow, and cigar-shaped. Elliptical galaxies are denoted by the letter E. They are also given a number from 0 to 7. An E0 galaxy looks like a circle. An E7 galaxy is very long and thin An Elliptical galaxy is one of four main types of galaxies that exist in the Universe. The other types are Spiral, Lenticular and Irregular. The best way to describe an Elliptical is that its shape ball or oval shaped. Our galaxy, the Milky Way is believed to be a spiral galaxy and not an Elliptical. Elliptical galaxies are classified from E0. Elliptical galaxy definition, a type of galaxy having the shape of a spheroid or ellipsoid, rather than a disk. See more As an elliptical galaxy, the galaxy is a spheroid rather than a flattened disc, accounting for the substantially larger mass of M87. Within a radius of 32 kiloparsecs (100,000 light-years), the mass is (2.4 ± 0.6) × 1012 times the mass of the Sun, which is double the mass of the Milky Way galaxy Elliptical galaxy spectrum. About one tenth of elliptical galaxies have a shell like structure which has never been observed in spiral galaxies. Distance peculiar velocities galaxy inclination gas dust and stars. The spectrum of the galaxy however is a mix of all the stars within it

An elliptical galaxy is of-course elliptical in shape. Elliptical galaxies are almost void of interstelar gas and dust. Thislack of gas and dust inhibits star formation. Irregular galaxies can come in many different shapes. They are put in this group because they don't fit into any of Hubble's other classifications مجرة الرامي الإهليجية القزمة Sagittarius Dwarf Spheroidal Galaxy (Sgr dSph), وتعرف أيضاً the Sagittarius Dwarf Elliptical Galaxy (Sgr dE or Sag DEG), او مجرة القوس القزمة مجرة كروية شبة اهليجية حلقية الشكل تقع في المجموعة المحلية وتتبع مجرة درب التبانة وتدور حولها An elliptical galaxy is a type of galaxy with an approximately ellipsoidal shape and a smooth, nearly featureless image. They are one of the three main classes of galaxy described by Edwin Hubble in his Hubble sequence and 1936 work The Realm of the Nebulae, along with spiral and lenticulargalaxies. Elliptical (E) galaxies are, together with lenticular galaxies (S0) with their large-scale. 楕円銀河 (だえんぎんが、英: elliptical galaxy )は、渦巻銀河、レンズ状銀河とともに、ハッブル分類における主要な3つの銀河分類のうちの1つ 。 滑らかなおよそ楕円形の形状を持ち、輝度プロファイルにほとんど特徴がない。 球形に近い形から非常に扁平なものまであり、内部に1000万から1兆. These galaxies look very different from spiral galaxies. Instead of spiral arms, elliptical galaxies are just big clumps of stars. There is very little gas and dust. An image of elliptical galaxy, IC 2006 taken with the Hubble Space Telescope. The stars form a cloud looking galaxy rather than grouping together in arms

Galaxies like to live together in groups called clusters. In clusters, elliptical galaxies are the most common type of galaxy. In our group of galaxies, for example, there are no giant ellipticals, but many dwarf ellipticals orbiting both the Milky Way and the Andromeda galaxy Many elliptical galaxies are believed to form due to the interaction of galaxies, resulting in a collision and merger. They can grow to enormous sizes (compared to spiral galaxies, for example), and giant elliptical galaxies are often found near the core of large galaxy clusters Elliptical galaxy is the one of the type of galaxy classification suggested by Edwin Hubble known as Hubble sequence or Hubble tuning Fork. The elliptical galaxy has no any spiral arms like Spiral galaxy but it looks as rounded shape of an ellipse or stretched out circle. Most famous elliptical galaxy is Cygnus A which is located. The elliptical galaxy is very different from the flat spiral galaxies for the latter features structure and organization. The stars found on the elliptical galaxies sit on the random orbits. Have you ever heard about Edwin Hubble? This scientist was the one who described three galaxies. Elliptical galaxy was one of them Dwarf elliptical (dE) galaxies, with blue absolute magnitudes typically fainter than MB =-16, are the most numerous type of galaxy in the nearby universe. Tremendous advances have been made over the past several years in delineating the properties of both Local Group satellite dE's and the large dE populations of nearby clusters. We review some of these advances, with particular attention to.

Colliding Galaxy Pair Takes Flight | NASA

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Elliptical galaxies are roughly egg-shaped (ellipsoidal or ovoid) found largely in galaxy clusters and smaller compact groups. Most ellipticals contain older, low-mass stars, and because they lack a great deal of star-making gas and dust clouds, there is little new star formation occurring in them The elliptical galaxy IC 1101 is the largest galaxy in the observable universe, with an estimated diameter of 2,000 kilolight-years. The elliptical galaxy Maffei 1 is the closest elliptical galaxy to the planet Earth. An example of an E1 elliptical galaxy is Messier 105, also known as NGC 3379

What is an elliptical galaxy? Cool Cosmo

An elliptical galaxy is the most common type of galaxy, has a roundish shape, and demonstrates little or no star formation. An irregular galaxy is a galaxy with no defined shape that has very young stars. Learning Outcomes. After watching this lesson, you should be able to Elliptical Galaxy. A galaxy lacking obvious spiral arms which are ellipsoidal in shape. de Vaucouleurs Law, Faber-Jackson Law, Fundamental Plane, Galactic Morphology, Galaxy, Holmberg Radius, Hubble-Reynolds Law, Spiral Galaxy. Binney, J. and Tremaine, S. Ch. 4 in Galactic Dynamics elliptical galaxy - WordReference English dictionary, questions, discussion and forums. All Free Elliptical galaxiesare a type of galaxy that are round or oval in shape and are mostly made up of older stars; it is believed that many galaxy collisions end up creating elliptical galaxies, and that eventually they will become more common as the universe ages. They vary in size; dwarf elliptical galaxies can be made up of just a few million stars, while the largest of them can have trillions.

An elliptical galaxy is a type of galaxy having an approximately ellipsoidal shape and a smooth, nearly featureless brightness profile. Unlike flat spiral galaxies with organization and structure, they are more three-dimensional, without much structure, and their stars are in somewhat random orbits around the center. They are one of the three main classes of galaxy originally described by. A galaxy is a large group of stars, gas, and dust bound together by gravity. Our solar system resides in the Milky Way galaxy, a spiral galaxy that is part of a group of galaxies called the Local Group. There are billions of galaxies in the Universe, but only three outside our Milky Way Galaxy can be seen without a telescope - the Large and.

What are elliptical galaxies? Find out on EarthSky Space

  1. Elliptical galaxies are one of the galaxy classifications in the Hubble Classification System. These galaxies are older than most other galaxies and only make up a small part of all galaxies. This lesson will cover the classification methods and facts about elliptical galaxies. Definition Galaxies come in a variety of shapes and sizes. In 1926, [
  2. Elliptical Galaxies. Spherical (ish) distributions of old stars, no distinct features and no disk, have older stars and little to no current star formation, similar to bulges of spiral galaxies, but larger. the largest and most massive galaxies in the universe are elliptical. Nice work
  3. Elliptical galaxies shed new light on dark matter. In the 1930s, it was first noticed that the dynamics of astrophysical objects (galaxies, galaxy clusters and the universe itself) required an.
  4. elliptical galaxy. Need synonyms for elliptical galaxy? Here's a list of similar words from our thesaurus that you can use instead. Noun. A system of millions or billions of stars, together with gas and dust, held together by gravitational attraction. galaxy. nebula. cluster. constellation

Elliptical galaxies are the most abundant type of galaxies found in the universe but because of their age and dim qualities, they're frequently outshone by younger, brighter collections of stars. Elliptical galaxies lack the swirling arms of the more well-known spiral galaxies. Instead, they bear the rounded shape of an ellipse, a stretched-out circle. Elliptical Galaxies originate from Edwin. Dwarf elliptical galaxies, or dEs, are elliptical galaxy that are much smaller than others. They are classified asdE, and are quite common in galaxy groups and clusters, and are usually companions to other galaxies. One of the most nearby Dwarf ellipticals (dEs) is Messier 110 (also known as NGC205), a satellite of the Andromeda galaxy. It was discovered by the French comet hunter Charles.

Elliptical Galaxy ESA/Hubble ESA/Hubbl

  1. Subclasses of elliptical galaxies are defined by their apparent shape, which is of course not necessarily their three-dimensional shape. The designation is En, where n is an integer defined by n = 10( a− b)/a. A perfectly circular image will be an E0 galaxy, while a flatter object might be an E7 galaxy
  2. Elliptical galaxies have a smooth gradient for brightness. Brightness progressively dimmers away from the center of the galaxy. This bulge of light at the center is a key difference between elliptical galaxies and other types of galaxies. 3. Irregular and lenticular galaxies
  3. ent member of the Virgo cluster of galaxies. It's one of the largest and most lu
  4. Published: 19 ago 2021 01:53 GMT A disruptive grouping of young stars and gaseous regions is described by scientists as a splinter sticking out of a plank of wood. Astronomers broadly classify galaxies into three main categories: elliptical, spiral, and irregular, with more than two-thirds of those they have observed included in that second shape
  5. g in run-of-the-mill elliptical galaxies, which do not spin and are more 3D and football-shaped than flat disks
  6. Elliptical galaxies are sub-classified according to how flat they are. The number next to the ``E'' in the tuning fork diagram = 10×(largest diameter - smallest diameter) / (largest diameter), so an E7 galaxy is flatter than an E0 galaxy. The flattened shape is not due to rotational flattening but to how the orbits are oriented and the.
  7. Large elliptical galaxies usually have extensive systems of globular clusters surrounding them. Elliptical galaxies are thought to be the result of galactic collisions. 15% of galaxies are elliptical. The smaller cousin of the Elliptical galaxy is the Dwarf Elliptical Galaxy: something in between an elliptical galaxy and a globular cluster

NGC 7317, at bottom left, is a normal-looking elliptical galaxy that is less affected by the interactions. Sharply contrasting with these galaxies is the dwarf galaxy NGC 7320 at upper left. Bursts of star formation are occurring in the galaxy's disk, as seen by the blue and pink dots An elliptical galaxy is a galaxy having an ellipsoidal shape, and a smooth, nearly featureless brightness profile. They are one of the three main types of galaxy originally described by Edwin Hubble in 1936. The others are spiral and lenticular galaxies.. Elliptical galaxies range in shape from nearly spherical to nearly flat, (E7, one of the flattest types of elliptical galaxies is cigar. An elliptical galaxy is a galaxy having an approximately ellipsoidal shape and a smooth, nearly featureless brightness profile. They are one of the three main classes of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae, [1] along with spiral and lenticular galaxies.They range in shape from nearly spherical to highly flat and in size from hundreds of. elliptical galaxy translation in English-French dictionary. fr Ce groupe de galaxies est fondamentalement différent des galaxies elliptiques normales. Leur diamètre est d' un ordre de # à # kiloparsec, avec une luminosité de surface qui est bien plus basse que les galaxies elliptiques normales, ce qui leur donne une apparence bien plus diffuse. Elles possèdent les mêmes caractéristiques. An elliptical galaxy, for example leaving behind it a long wake glowing in radio waves.. Una galaxia elíptica, por ejemplo dejando atrás una larga estela, brillando en ondas de radio

Elliptical Galaxies Ask An Earth and Space Scientis

Compact elliptical galaxies form a rare class of stellar system (~30 presently known) characterized by high stellar densities and small sizes and often harboring metal-rich stars. They were thought to form through tidal stripping of massive progenitors, until two isolated objects were discovered whe M-60, like M-49 and M-87, is a giant elliptical galaxy. Its mass, as given by Erik Holmberg in his 1964 Catalogue of External Galaxies, is about one trillion solar masses, roughly 5 times that of the Milky Way. Compared with M 32, the elliptical companion of the Andromeda Galaxy, it is 200 times as massive. Its diameter is about 120,000 light.

APOD: November 14, 1999 - M31: The Andromeda GalaxyNational Optical Astronomy Observatory: M81

Elliptical galaxy - definition of elliptical galaxy by The

Elliptical; Irregular; Spiral Galaxy. Spiral galaxy is the Galaxy that was formed in a spiral shape with a distinct flattened disk-like structure with a bright center called a nucleus. Our Milky Way galaxy is an example of the spiral galaxy. The young stars are formed in the outer arms of the galaxy while the old stars are formed in the inner arms Disks in Elliptical Galaxies. Rix, Hans-Walter. ; White, Simon D. M. Abstract. We investigate the abundance and strength of disk components in elliptical galaxies by studying the photometric properties of models containing a spheroidal r^1/4^-law bulge and a weak exponential disk. For such idealized models the disk can be detected by a. Download 303 Elliptical Galaxy Stock Illustrations, Vectors & Clipart for FREE or amazingly low rates! New users enjoy 60% OFF. 168,752,394 stock photos online The ages of model elliptical galaxies range from ≃4 Gyr for galaxies with mass a few times larger than 10 8 M ⊙ to ≃10 Gyr for galaxies with mass ≃10 12 M ⊙. It is interesting to note that the lookback time corresponding to the redshift when half of the stars had formed is a very good approximation to the luminosity-weighted age over.

The two groups of stars eventually become a giant elliptical galaxy with no discernible spiral structure. Such interactions can also trigger a small amount of star formation. When the galaxies. An elliptical galaxy is a galaxy that has a superficially smooth, featureless appearance and an ellipsoidal shape. Giant ellipticals, such as M87, may contain over 10 trillion solar masses in the form of stars, are among the largest of galaxies, and are often found at the heart of rich clusters of galaxies, i.e. those containing large numbers of galaxies in a relatively compact volume of space

National Optical Astronomy Observatory: M101

Elliptical galaxy astronomy Britannic

  1. 1.กาแล็กซีรี (elliptical galaxy) 2.กาแล็กซีกังหัน (spiral galaxy) 3.กาแลกซี่อสันฐาน หรือ ไร้รูปร่าง ( Irr , Irregular galaxies) กำเนิดเอกภพ(Big Bang) 1. การขยายตัวของเอกภ
  2. The masses of elliptical galaxies cover a large range: from about 10 up to 10 solar masses. The corresponding range of diameters is about 1/10 kiloparsecs to about 100 kiloparsecs, and the absolute blue magnitude varies over a correspondingly large range from -8 to -23 (the brightest elliptical galaxy is a million times brighter than the faintest)
  3. Elliptical galaxies are ellipsoidal agglomerations of stars, which usually do not contain much interstellar matter, and look smoothly like small wads in the telescope. Sizes vary from considerably small systems (as M32 which is quite bright though) to really giant guys as M87
  4. Elliptical galaxies are simply vast collections of stars that remain relatively close together because of the gravitational attraction between them. Unlike the spirals there is no well defined rotation axis, so the stars in the galaxy show a wide range of orbital paths around the centre. The motions of stars are not entirely random, however
  5. osity can be found from the velocity dispersion of the stars in the central few kiloparsecs of the galaxy. In 1977 Brent Tully and Richard Fisher discovered a similar relation between the rotational velocity of the disk and the lu

Elliptical Galaxy Definition of Elliptical Galaxy by

Broadly galaxies are categorised into three types that are Spiral,Elliptical and Irregular. Spiral galaxies- These types of galaxies are broad,flat rotating disk of star,gas and dust,a central bulge of stars.Milkyway is a spiral type of galaxy,whose arms spins outwards at about 168 miles/second.Some spirals have large central bulges and some. Elliptical galaxies are also known for their dearth of star-forming material. This is because when spirals — which typically contain plentiful gas with which to make new stars — collide.

elliptical galaxy - Translation into Arabic - examples

  1. Elliptical galaxies are the most common type of galaxy that scientists have found in our universe. Astronomers have identified and named more of the spiral galaxies because their swirling arms and.
  2. Elliptical galaxies (on the left) look roughly egg-shaped and are relatively featureless. All that can usually be detected is a decrease in surface brightness as one move outwards from the center of the galaxy. Apparent shapes range from almost circular (E0) to quite elliptical (E6) - these have the long axis four times the short axis..
  3. Download Elliptical Galaxy And Stars wallpaper for your desktop, mobile phone and table. Multiple sizes available for all screen sizes. 100% Free and No Sign-Up Required
  4. The metal-rich elliptical galaxies that ran out of fuel the fastest might be the best places to look for the very first habitable planets to arise in the Universe
  5. ent in the universe. They are found inside the Cosmos . An elliptical galaxy is normally a lot larger than other galaxies.
  6. ated by old stars like mature elliptical galaxies seen in the current Universe
  7. What does elliptical-galaxy mean? A galaxy with an elliptical shape, containing relatively little gas and dust and having older stellar populations as com..

Types of Galaxies. There are four distinct types of galaxies in the universe, elliptical, spiral, barred spiral, and irregular. Although these are the four main types, there are various types of galaxies and the way in which they are classified is by their shape.. A galaxy is a cluster of stars, gas, and dust that are kept together by the force of gravity Elliptical galaxies vary in size, from small dwarf galaxies to enormous galaxies. An example of a giant elliptical galaxy is ESO 325-G004, while Leo I is a dwarf elliptical galaxy. An intermediate between the giant and dwarf elliptical galaxies are systems such as M32 and M110, they are companions of the Andromeda galaxy This dwarf galaxy is called SagDEG (for Sagittarius Dwarf Elliptical Galaxy), or sometimes Sagittarius Dwarf Spheroidal Galaxy; don't confuse it with another member, SagDIG (Sagittarius Dwarf Irregular Galaxy). It is strongly recommended to avoid misleading designations such as Sagittarius Dwarf (which is an older designation for SagDIG. Barred spiral galaxy type B - abbreviation SBb - they feature both tightly and loosely bond arms. 6. Barred spiral galaxy type C - abbreviation Sbc - they have loosely bound arms. Future. Usually, spiral galaxies are believed to evolve into elliptical galaxies as they get older. All galaxies change their form/shape as they age The model can be a smoothed version of the original image, or a synthetic galaxy image with the best-fitting elliptical isophotes, or an image taken in a redder bandpass. (In the last case, the ratio is a color image.) These techniques show that 50% of bulges and elliptical galaxies contain dust. 4.1. Frequency of Occurrence of Dus

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  1. Examples of elliptical galaxy in a sentence, how to use it. 20 examples: They normally occur in regions of new star formation, and have never bee
  2. A galaxy may be made up of two visible components. The two components are the disk and the bulge. Spiral galaxies have most of their stars in a disk. Elliptical galaxies do not have a disk. The stars may be single stars, double, or multiple stars, or may be part of clusters. In the disk, stars cluster into open clusters (also called galactic.
  3. Astronomers classify galaxies into three major categories: elliptical, spiral and irregular. These galaxies span a wide range of sizes, from dwarf galaxies containing as few as 100 million stars to giant galaxies with more than a trillion stars
  4. Elliptical galaxies, such as M87 (left), have very little gas and dust. Because gas and dust are found in the clouds that are the birthplaces of stars, we should expect to see very few young stars in elliptical galaxies. In fact, elliptical galaxies contain primarily old, red stars (also known as Population II stars)
  5. ation of flux-based estimates of star formation from unrelated phenomena, such as AGN and old stellar populations. We here utilise core-collapse supernovae (CCSNe) as unambiguous tracers of recent star formation in ellipticals within a cosmic volume. We firstly isolate a.

Elliptical Galaxy - Universe Toda

elliptical galaxy Category of galaxy in which the stars are distributed in an elliptical shape on the sky, ranging from highly elongated to nearly circular in appearance. emission line Bright line in a specific location of the spectrum of radiating material, corresponding to emission of light at a certain frequency Elliptical galaxies do not have disks around them, although some bulges of disk galaxies look similar to elliptical galaxies. One is more likely to find elliptical galaxies in more crowded regions of the universe (such as galaxy clusters). Astronomers now see elliptical galaxies as some of the most evolved systems in the universe. It is widely. Elliptical Galaxy - stars form rapidly as the protogalactic cloud shrinks - protogalactic cloud has high density - a galaxy collision strips away gas - protogalactic cloud rotates very slowly. Astronomers suspect that a galaxy's type can be determined either by initial conditions in a protogalactic cloud or by later interactions between. Spiral galaxies form from a single collapsing cloud of gas. Ellipticals form from the merger of multiple other galaxies. Thus spirals will poses whatever angular momentum the gas has as it collapses into a disk, while stars in elliptical galaxies have random orbits due to the various angles of the mergers that created them The Sagittarius Dwarf Elliptical Galaxy (SagDEG) is one satellite galaxy interacting with the Milky Way. Simulations of the interactions of the sagittarius dwarf elliptical galaxy with the Milky Way. Eventually they'll merge and form one large elliptical galaxy. This pair of colliding spirals is 300 million light-years away in the constellation.

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Elliptical Galaxies: These galaxies are usually round but they can actually stretch out longer on one of their axis so that they can appear like a cigar. From our observations it seems that the biggest known galaxies in the universe are elliptical galaxies and they can extend out over two million light-years, holding up to a trillion stars Elliptical Galaxies . Less than one in seven galaxies in our universe are elliptical galaxies. As the name suggests, these galaxies are either range from having a spherical to egg-like shape. In some regards they look similar to large star clusters, however, the presence of large amounts of dark matter help distinguish them from their smaller. Elliptical galaxies were once thought to be aging star cities whose star-making heyday was billions of years ago. But new observations with NASA's Hubble Space Telescope are helping to show that elliptical galaxies still have some youthful vigor left, thanks to encounters with smaller galaxies

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