[DOC] [TLE] Galaxies, Galaxy Information, Galaxy Facts, News, Photos ... - Science [PAR]  [DOC] [TLE] Types and classification [PAR] Apr 18, 2000 ... There are three main types of galaxies: Elliptical, Spiral, and Irregular. Two of 
these three types are further divided and classified into a system... [DOC] [TLE] Types of Galaxies - Spiral, Elliptical & Irregular Galaxies - Space Facts [PAR] Solar System ... It uses the three main types, and then further breaks them down 
by specific ... Spirals are large rotating disks of stars and nebulae, surrounded by 
a shell of dark matter. ... A large majority of galaxies have these bars, and 
astronomers study them to understand what function they play within the galaxy. [DOC] [TLE] Three Main Types of Galaxies | The Classroom | Synonym [PAR] A galaxy is a collection of solar systems, stars, nebulae, dust, planets and gas ... 
Unlike elliptical or spiral galaxies, irregular galaxies have no visible pattern. 
These are the smallest of the galaxies and may contain as few as 1 million stars. [DOC] [TLE] Galaxies - Astronomy For Kids - KidsAstronomy.com [PAR] Solar System .::. ... There are three kinds of Galaxies, Spiral, Elliptical, and 
Irregular. ... Because of their size these large stars glow brighter than their 
smaller cousins, ... They can look like anything and have many different 
characteristics. [DOC] [TLE] Galaxies Types and Classifications - CliffsNotes [PAR] The identification of other galaxies, or independent stellar systems, goes back to 
... The past star formation history of an elliptical thus must be very different than 
that which ... These three characteristics, the bulgetodisk ratio, the openness of 
the ... considering the irregular galaxies to be an extension of the spiral types). [DOC] [TLE] Galaxies, Galaxy Information, Galaxy Facts, News, Photos ... - Science [PAR] Galaxies are classified into three main types: spiral galaxies, elliptical galaxies, and irregular galaxies. Spiral galaxies, such as the Milky Way, consist of a flat disk with a bulging center and surrounding spiral arms. Elliptical galaxies are shaped as their name suggests. Galactic Mergers. Galaxy Origins. [DOC] [TLE] High School Earth Science/Galaxies - Wikibooks, open books for an ... [PAR] 3.1 Spiral Galaxies; 3.2 Elliptical Galaxies; 3.3 Irregular Galaxies and Dwarf 
Galaxies ... There are several different types of galaxies and there are possibly 
billions of ... These small groups of stars are called star systems and larger 
groups of ... Galaxies are divided into three types according to shape: spiral 
galaxies,... [DOC] [TLE] Galaxy Formation: Spiral, Elliptical & Irregular Galaxies - Video ... [PAR] You'll also learn about the solar nebula hypothesis and three galaxy types,... ... 
Galaxy Formation: Spiral, Elliptical & Irregular Galaxies. Chapter 9 / Lesson 5 .... 
Spiral galaxies have three main parts: a bulge, disk, and halo. Think of the ... Our 
sun and solar system are located in one of the arms of the Milky Way spiral 
galaxy. [DOC] [TLE] Galaxy - Wikipedia [PAR] A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar 
gas, dust, and ... At the largest scale, these associations are generally arranged 
into sheets and ..... Galaxies come in three main types: ellipticals, spirals, and 
irregulars. .... Dwarf galaxies may also be classified as elliptical, spiral, or 
irregular. [DOC] [TLE] galaxy - Types of galaxies | astronomy | Britannica.com [PAR] Apr 13, 2016 ... Hubble subdivided these three classes into finer groups. ... Ellipticals contain 
neither interstellar dust nor bright stars of spectral types O and B. Many ... Both 
the arms and the disk of a spiral system are blue in colour, whereas its .... The Irr I 
type is the most common of the irregular systems, and it seems to fall... [DOC] [TLE] Hubble sequence - University of Oregon [PAR] Gravity holds the billions of stars together, and the densest region is in the center, 
... Our solar system is located in outer regions of a spiral galaxy we call the Milky 
Way. ... are divided into three general classes: ellipticals, spirals, and irregulars. 
... These galaxies are nearly all

Question: 3 main types of these star systems are irregular, spiral & elliptical
Answer: galaxies