Types of galaxies

13.8: Types of Galaxies - Physics LibreText

Elliptical galaxies range in size from giants, more massive than any spiral, down to dwarfs, with masses of only about \(10^6\) \(M_{\text{Sun}}\). Dwarf ellipticals are probably the most common type of galaxy in the nearby universe. A small percentage of galaxies with more disorganized shapes are classified as irregulars Types of Galaxies Spiral Galaxies. Our own Galaxy and the Andromeda galaxy are typical, large spiral galaxies. They consist of a central... Elliptical Galaxies. Elliptical galaxies consist almost entirely of old stars and have shapes that are spheres or... Irregular Galaxies. Hubble classified. Dwarf galaxies are the most common type in the universe. However, because they are relatively small and dim, we don't see as many dwarf galaxies from Earth. Most dwarf galaxies are irregular in shape. However, there are also dwarf elliptical galaxies and dwarf spiral galaxies. Look back at the picture of the spiral galaxy, Andromeda Scientists have classified galaxies into three types: elliptical, spiral, and irregular Types of Galaxies - Spiral, Elliptical & Irregular Galaxies Spiral Galaxies. Spirals are the most common form of galaxies and you will find them all over the universe, including in... Elliptical Galaxies. The elliptical galaxies that are found largely in galaxy clusters and smaller compact groups,.

Types of Galaxies Astronomy - Lumen Learnin

  1. Spiral galaxies are the most common type in the universe. Our Milky Way is a spiral, as is the rather close-by Andromeda Galaxy. Spirals are large rotating disks of stars and nebulae, surrounded by a shell of dark matter. The central bright region at the core of a galaxy is called the galactic bulge
  2. Learn about the three general types of galaxies: spiral, elliptical, and irregular. © Open University ( A Britannica Publishing Partner) See all videos for this article. Almost all current systems of galaxy classification are outgrowths of the initial scheme proposed by the American astronomer Edwin Hubble in 1926
  3. List of Naked Eye Galaxies Large Magellanic Cloud (Magnitude 0.9) Small Magellanic Cloud (Magnitude 2.7) Andromeda Galaxy (Magnitude 3.4) Triangulum Galaxy (Magnitude 5.7) Centaurus A (Magnitude 6.84) Bode's Galaxy (Magnitude 6.94) Sculptor Galaxy (Magnitude 7.2
  4. The 3 types of galaxies are: Spirals. Ellipticals. Irregular and Lenticular. Galaxies are just large accumulation of stars, planets, and other solar remnants. Astronomers estimate as many as 100 billion galaxies in the expanding universe. We observe galaxies using the Kepler and Hubble Telescopes
  5. Galaxies differ from each other in shape, size, colour and composition. There are three types of galaxies that we find in the universe. Elliptical Galaxies. These type of galaxies are like flattened balls of old stars and contain very little gas. It also includes the most massive galaxies containing a trillion stars. Spiral Galaxies
  6. There are three main types of galaxies. The first of these three types of galaxies is the elliptical galaxy which are fat in the middle and then, taper off towards the end of the galaxy itself. The largest galaxies that are known of are elliptical galaxies which are made of more than a trillion stars held together

Most irregular galaxies were once spiral or elliptical galaxies that were then deformed either by gravitational attraction to a larger galaxy or by a collision with another galaxy. Dwarf galaxies.. Galaxies are classified by shape. There are three general types: elliptical, spiral, and irregular. Perhaps the most familiar kind of galaxy are spiral galaxies. They have a distinctive shape with spiral arms in a relatively flat disk and a central bulge List of galaxies Named galaxies. This is a list of galaxies that are well known by something other than an entry in a catalog or list, or... Naked-eye galaxies. This is a list of galaxies that are visible to the naked eye, for at the very least, keen-eyed... Observational firsts. Lord William. For more like this subscribe to the Open University channel: https://www.youtube.com/channel/UCXsH4hSV_kEdAOsupMMm4QwFree learning from The Open University:.

Types of Galaxies Physical Geograph

  1. 4. Spiral Galaxies Classification <br />They are classified for how tightly together the arms of the galaxy are <br />The scale is Sa- Sd <br />Sa, is the most tight <br />Sd, is very loose <br />If the galaxy has a bar through the galaxy, the scale is SBa-SBd <br />. 5. Elliptical Galaxies <br />They range from being the biggest to smallest.
  2. Space is fascinating, huge and vast. It is made up of planets, stars, galaxies, and all forms of matter and energy. The Big Bang Theory explains how the univ..
  3. Types of galaxies Morphological classification. The major components of a galaxy are the bulge (a central, spherical, and very dense group of stars) and the disk that usually contains spiral arms. We can categorize galaxies according to their shape, that is the shape of the bulge and disc. This what Edwin Hubble did in 1926

Types of Galaxies. The most popular types of galaxies, according to their morphology, are elliptical, spiral and irregular. Elliptical galaxies ned.ipac.caltech.edu. This type of galaxy is composed of old stars and doesn't have interstellar dust or gases, for that reason has a very low production of new stars Types of Galaxies Elliptical Galaxies. Elliptical galaxies are usually spherical, and are formed by smaller galaxies colliding into one... Spiral Galaxies. Spiral galaxies are named after the spiral shape formed by their arms. The Milky Way and galaxies are... Irregular Galaxies. Galaxies that do. Now, what are the three types of galaxies, these three main types of galaxies are spirals, elliptical, and irregular shaped galaxies

There are four main categories of galaxies: elliptical, spiral, barred spiral, and irregular. These types of galaxies are further divided into subcategories while at the same time other types of galaxies exist based on their size and other unique features. The most common type of galaxy found throughout the universe is the spiral galaxy The universe is made up of countless such galaxies of various sizes and shapes. What is a galaxy? › The Milky Way › If you look at the sky on a clear, dark night you might spot the Milky Way as a long streak of patchy light curving across the sky. As our planet is located within the Milky Way, this galaxy appears only as band of light to us 26.2 Types of Galaxies. Learning Objectives. By the end of this section, you will be able to: Describe the properties and features of elliptical, spiral, and irregular galaxies. Explain what may cause a galaxy's appearance to change over time. Having established the existence of other galaxies, Hubble and others began to observe them more.

Types of Galaxies. Key points: Basic types of galaxy - spiral, barred, elliptical, irregular; types vs. distance (how young galaxies differ from those around us) Spiral galaxies are the most intriguing visually, But in fact galaxies come in many shapes and sizes Types of Galaxies What Kinds of Galaxies Are There? 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. Ellipticals, which account for about one-third.

Spiral galaxies: The most common type of galaxy (as defined by a magnitude-limited survey of the local universe). Named for the apparently spiral structure of their thin-disk stars, caused by stellar density waves. They may also have nuclear spheroidal population (bulge) and an extended spheroidal population (halo) Some other types of galaxies also exist based on their size and other features. The most common type of galaxy found in the universe is the spiral-shaped galaxy. Almost 77% of the galaxies discovered till date are spiral shaped galaxies. For example, the Andromeda galaxy is a spiral shaped galaxy Types of Galaxies. Galaxies are available three main types: ellipticals, spirals, and irregulars. Elliptical Galaxy. The Hubble arrangement rates elliptical galaxies on the idea of their ellipticity, starting from E0, being nearly spherical, up to E7, which is very elongated. These galaxies have an ellipsoidal profile, giving them an elliptical. What are the 4 types of galaxies? In 1936, Hubble debuted a way to classify galaxies, grouping them into four main types: spiral galaxies, lenticular galaxies, elliptical galaxies, and irregular galaxies In these Sc galaxies, luminous stars and emission nebulae are very prominent. Our Galaxy and the Andromeda galaxy are both intermediate between the two extremes. Photographs of spiral galaxies, illustrating the different types, are shown in Figure 3, along with elliptical galaxies for comparison. Figure 3: Hubble Classification of Galaxies

Types of Galaxies for Kids - Spiral, Elliptical

Types of Galaxies Scientists and astronomers believe that galaxies were formed within milliseconds after the cosmic big bang around 10-20 billion years ago. The explosion cased gas clouds to collapse, coalesce, mix, and compress under gravitational forces to help to build the materials for galaxies Galaxies are composed of stars, dust, and dark matter, all held together by gravity. They come in a variety of shapes, sizes, and ages The most well known are our galaxy, the Milky Way, and the Andromeda galaxy. The Andromeda galaxy is the closest galaxy to our own galaxy, being around 2.5 million light years away. We refer to the four different types of galaxy as the spiral galaxy, the barred spiral galaxy, the elliptical galaxy and the irregular galaxy Stars and galaxies. Way beyond our solar system there are billions and billions of stars. Some stars are much younger than our sun and others are much older. There are different types of star and the distances between them are huge. Stars are grouped together in gigantic, spinning collections called galaxies. Our home galaxy is called the Milky.

Types of Galaxies - Spiral, Elliptical & Irregular Galaxie

  1. Last time I talked about the Great Debate of 1920, and about Edwin Hubble's discovery that Galaxies lie beyond the Milky Way.The 1920s changed over view of the Universe - they made it much larger! This time I'm going to quickly outline the basic types of galaxies and the kind of sizes and distances we are dealing with
  2. Even though these are the main types of galaxies, they aren't the only ones! For example, a starburst galaxy is a short phase in a galaxy's evolution where stars are formed at hundreds of times the rate of normal spiral galaxies
  3. Hubble quickly realized that the vast majority of galaxies have only a small number of shapes. A classification based on their optical appearance or morphology is limited to four fundamental types of galaxies—ellipticals, spirals, irregulars, and S0s. The Hubble classification has proven to be immensely valuable to the study of galaxies
  4. The type A galaxies are the galaxies with tight arms whereas loose arm galaxies are type b galaxies and the very loose arm galaxies are type c galaxies. The Milky Way is an example for SBA galaxy. Irregular galaxies. As the name indicates, these galaxies are a cluster of stars and planets along with them with no real structure

These types of galaxies are further divided into subcategories while at the same time other types of galaxies exist based on their size and other unique features. The most common type of galaxy found throughout the universe is the spiral galaxy. Around 77% of the galaxies observed by man are spiral galaxies Stars and gas clouds circle around the center of the galaxy. Astronomers believe that most galaxies rotate around a black hole, an object that attracts great gravitational force, even light. In addition to our Galaxy in the universe, there are many other galaxies that differ from each other in shape and size. We divided all the galaxies into 3 types: elliptical, spiral and irregular

ID: 219283 Language: English School subject: Science Grade/level: Grade 6 Age: 10-12 Main content: Types of galaxies Other contents: Add to my workbooks (6) Add to Google Classroom Add to Microsoft Teams Share through Whatsap Edwin Hubble's discoveries in the 1920s led to the understanding that the Milky Way is not the only galaxy in the Universe. In a 2 to 3 paragraph essay, describe the five types of galaxies within Hubble classification system. Select one of the galaxy types and search online for an example. Include a picture of Continue reading Types of galaxies within Hubble classification syste Types of Galaxies. A galaxy is a huge collection of gas, dust, and billions of stars all held together by gravity. All galaxies are made up of these same things. However, they come in many different shapes and sizes. Here are a few types of galaxies: Spiral galaxies look like giant pinwheels. The arms of the pinwheel are made up of stars and. In 1936, Hubble debuted a way to classify galaxies, grouping them into four main types: spiral galaxies, lenticular galaxies, elliptical galaxies, and irregular galaxies. More than two-thirds of all observed galaxies are spiral galaxies. Our Milky Way, like other spiral galaxies, has a linear, starry bar at its center

Because elliptical galaxies contain older stars and less gas than spiral galaxies, it seems that the galaxy types represent part of a natural evolution: As spiral galaxies age, interact, and merge. Classifying types of galaxies helps us discover more about the interstellar universe and the history behind the creation of everything. (Literally!) In Astronomy, Elliptical and lenticular galaxies are often termed early-type galaxies because they are known to house some of the oldest stellar populations and are relatively inactive. classified just like ordinary spiral galaxies SBa, SBb, SBc barred Our own milky way is probably an SBb type galaxy, similar to Andromeda, but with a central ba Galaxies of all types are the basic units of luminous matter in the Universe. Basic units of larger, organized structures Sites of star formation from raw gas Factories that synthesize heavy elements from Hydrogen & Helium Differences in the types of galaxies reflect the difference in their formation histories and environments A small population of galaxies somewhere in between red (late type) and blue (early type) galaxies in the bimodal distribution of galaxy types. It is not clear whether these galaxies are simply outliers among the early and late type distributions, are in transition between the two populations, or are another class of galaxy alltogether

galaxy - Types of galaxies Britannic

Types of Galaxies Pictures, Facts, and Informatio

  1. Different Types of Galaxies. Ready for liftoff? Take to the starry skies with this worksheet that explores the three basic types of galaxies. What type of galaxy do you think we live in
  2. ant type of galaxy in the universe overall. Lenticular Galaxies Apart from the above classification of spiral and elliptical galaxies, there exist some disk-shaped galaxies with no trace of elliptical arms
  3. Galaxy, any of the systems of stars and interstellar matter that make up the universe. Many such assemblages are so enormous that they contain hundreds of billions of stars. Virtually all galaxies appear to have been formed soon after the universe began, and they pervade all space that is viewable by modern telescopes
  4. Types of Galaxies This lesson introduces the elliptical, spiral, and irregular galaxies and how some of these galaxies may be unusually active in the production of stars or with the presence of a large central black hole
  5. The type of galaxy that has few young stars, little gas or dust, and NO arms is a/n. answer choices . elliptical galaxy. spiral galaxy. irregular galaxy. barred spiral galaxy. Tags: Question 13 . SURVEY . 300 seconds . Q. The Milky Way is what type of galaxy? answer choices . Spiral. Elliptical. Irregular. Barred spiral
  6. Our milky way galaxy is in the spiral shape with a bright bulge at its center. The famous astronomer Edwin Hubble studied the galaxies for many years and found that there are four shapes in which the galaxies expand. This classification system is known as Hubble sequence and the four types are. Spiral. Lenticular or Barred spiral

What Are the 3 Types of Galaxies? - Earth Ho

Astro Did You Know?: Spiral and Elliptical Galaxies

Please refer back to it as you go through these notes, in order to obtain a feel for what different types of galaxies look like. (1) Our galaxy is one of roughly 100 billion galaxies visible to us. A galaxy is a large assembly of stars, gas, dust, and dark matter, held together by gravity The dwarf ellipticals may be the most common type of galaxy in the universe (or maybe the dwarf irregulars are). Small galaxies classified as dwarf spheroidals are even fainter than most dwarf ellipticals but dwarf spheroidals may be just a continuation of dwarf ellipticals to smaller sizes and they can have as little as just a few hundred stars Types of Galaxies. Galaxies come in many different shapes and sizes ranging from dwarf galaxies with as few as 10 7 stars, to giants with 10 12 stars. Galaxies range from 1,000 to 100,000 parsecs in diameter and are usually separated by millions of parsecs Next we introduced three types of galaxies; spiral, elliptical and irregular. Here is a layout of all three galaxies. Spiral Galaxy. Elliptical Galaxy. Irregular Galaxy. We used this poster as a guide for the types of galaxies. This can be downloaded for free from my shop here The second type of galaxy is elliptical galaxies. These galaxies are a the sphere like shape that looks like a football or a cigar. The largest galaxies in the universe are elliptical, and the usually have the oldest stars. Fun fact half of all galaxies in the universe are elliptical. The Last galaxy type is irregular galaxies

What is a Galaxy? Definition and Types of Galaxies

Spiral galaxies 3 components : bulge , disk halo Made up of density waves The bulge is a spherical structure found in the galaxies center containing mostly old stars. In the disk is where the dust, gas, and younger stars are located. There is a formation of arms in which th The Cartwheel galaxy is an example of this type of collision. The outer ring of blue stars in this galaxy indicates a ripple of star formation resulting from the collision. The Milky Way and Andromeda are examples of two spiral galaxies that may eventually collide (about 5 billion years in the future).. Galaxies of all types, though of a wide variety of shapes and appearances, have many basic common features. They are huge agglomerations of stars like our Sun, counting several millions to several trillions. Most of the stars are not lonely in space like our Sun, but occur in pairs (binaries) or multiple systems.. The Andromeda Galaxy is the nearest spiral galaxy to our Milky Way galaxy, but not the nearest galaxy overall. It gets its name from the area of the sky in which it appears, the constellation of Andromeda, which was named after the mythological princess Andromeda. (In 1924, Hubble first demonstrated the existence of Galaxies beyond Milky Way

galaxy types types of galaxies different galaxies. Public Domain. WikiImages / 1177 images Coffee Follow. Galaxy M85 is an S0 galaxy. There is a second type of lenticular galaxy called a barred lenticular galaxy. Barred lenticular galaxies have bars, much like the barred spirals, and so they are denoted SB0. Irregular Galaxies. M82 Courtesy of The Digitized Sky Survey. Galaxies that do not fit into either the spiral or elliptical classes are called.

Galaxy Clusters: Busy Neighborhoods in the Universe

* The most widely used classification scheme for galaxies is based on one devised by Edwin P. Hubble and further refined by astronomer Gerard de Vaucouleurs. It uses the three main types, and then further breaks them down by specific characterist.. At the moment, we consider common types of galaxies and we ask about characteristics of galaxies that you can see with visible light. There are four main classes (as classified by Hubble). Spiral galaxies. Disk + central bulge. M51 Whirlpool Galaxy [type Sc]. M31 Andromeda Galaxy [type Sb]. M77 in Cetus [type SBp]. M104 Sombrero Galaxy [type Sa] Hubble's Galaxy Classification. The Coma Cluster is one example of a collection of many galaxies, each consisting of hundreds of billions of stars Many different types of galaxies. The American astronomer Edwin Hubble was the first to categorize galaxies in a comprehensive way The word galaxy brings to mind images of the Milky Way or perhaps the Andromeda galaxy, with their spiral arms and central bulges.These spiral galaxies are what people commonly imagine all galaxies look like. Yet, there are many types of galaxies in the universe and they're not all spirals. To be sure, we live in a spiral galaxy, but there are also elliptical (rounded without spiral arms. The classification for the spirals is further subdivided into five luminosity classes: from I (most luminous) to V (least luminous). Figure 05-01b shows some real images for the different types of galaxies; while Figure 05-01c is a schematic diagram showing the side view of the elliptical galaxies and top view of the spiral galaxies


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. Main Types of Galaxies Spiral Elliptical Irregular Properties of Spiral Galaxies Shaped like flattened disks with one or more spiral arms Which types of galaxies are the most common and which ones are the least common? The smallest elliptical galaxies (called dwarf ellipticals) are probably the most common type of galaxy in the nearby universe. In contrast to spirals, the stars in ellipticals do not revolve around the center in an organized way For instance, I study a type of galaxy that is very bright in infrared light (which we can't see with our eyes, but which is the kind of light people see in night-vision goggles and traces things that have relatively high temperatures). Many of these galaxies are the result of collisions between two other galaxies What is the most common galaxy type? Elliptical galaxies. How many different galaxies are there? While estimates among different experts vary, an acceptable range is between 100 billion and 200 billion galaxies, said Mario Livio, an astrophysicist at the Space Telescope Science Institute in Baltimore, Maryland Ellipsoidal Galaxies - Symmetrical structures ranging from spheres to flattened ellipsoids (in cross section). Usually the type of stars are older type of stars called Population II. Spiral Galaxies - A galaxy that has a distinct nucleus and one or more spiral arms. The arms extend outward from the nucleus and are composed of stars, dust, and gas

NASA spots birth of the biggest black holes ever seenSmallest, Faintest Galaxies of the Ancient Universe

Types Of Galaxies Types O

The most distant galaxies are from billions of years ago and they are smaller, on average, than what we see closer to us. If we assume 100 billion stars for an average for all those 2 trillion, the total no. of stars is very roughly 2 x 10^23. As the huge telescopes come along and that number grows by 3x, then we would have an Avogadro number. Type: Lenticular Galaxy. (half way between a spiral and elliptical galaxy) Features: Never explored because of its extreme gravitational force. It is 50 000 light years across, encircled by thick lanes of dust. Location: about 500 million light years from Earth. It is in the Sculptor constellation. It is about 150,000 light-years across, making. Different Types of Galaxies. Galaxies come in different shapes and sizes. Usually they look like fried eggs; a flat circle with a bulge in the middle. If we were able to look at a galaxy from above, it would appear as a bright ball with arms spiralling out of it, spinning Some galaxies are referred to as dwarf ellipticals because they share many of the properties of elliptical galaxies but are significantly smaller and less massive. NGC 205 is an example. If we take a census of the galaxies in the Universe, it appears that by number, dwarf ellipticals are the most common type of galaxy in the Universe Types of Galaxies •Edwin Hubble was the first to show that there are other galaxies besides our own. •Hubble telescope estimated that there are 10,000 galaxies within its field of view

Types of Galaxies. Galaxies are the biggest groups of ..

26.2 TYPES OF GALAXIES Learning Objectives By the end of this section, you will be able to: Describe the properties and features of elliptical, spiral, and irregular galaxies Explain what may cause a galaxy's appearance to change over time Having established the existence of other galaxies, Hubble and others began to observe them mor PDF (38.3 KB) This is a simple note-taking page on the 4 main types of galaxies: spiral, elliptical, lenticular, and irregular.Prints on 8.5x11 paper, but is sized to cut down to a standard composition book page. Completed notes are also provided for teacher use and/or to print for students with accommodations Ficha online de Types of galaxies para Grade 6. Puedes hacer los ejercicios online o descargar la ficha como pdf Types Of Galaxies: Drag & Drop Worksheet: Google Slides. Distance LearningInteractive Digital Worksheet- Drag and Drop activity on Types Of Galaxies. Please watch the preview video before purchasing to understand how this product works.Answer key: Within the ZIP file is a PDF for the Answer Key6 Jul 19, 2019 - Types of Galaxies Poster - The Learning Ark. Jul 19, 2019 - Types of Galaxies Poster - The Learning Ark. Jul 19, 2019 - Types of Galaxies Poster - The Learning Ark. Pinterest. Today. Explore. When the auto-complete results are available, use the up and down arrows to review and Enter to select. Touch device users can.

Galaxies - NAS

Different Types of Galaxies We noticed that you have a pop-up blocker or ad blocker installed on your browser. This may be stopping the print version from appearing Different types of galaxies include spiral galaxies such as our own Milky Way, rich in dust and gas with stars still forming in their arms; elliptical galaxies devoid of gas, lenticular galaxies and irregular galaxies such our neighbours the Magellanic Clouds and the Sagittarius dwarf galaxy Types of Galaxies. Galaxy Formation. The Milky Way. The Local Group. Galaxies Fade. Cosmology. The Whole Universe. Age of the Universe. Dark Matter. Dark Energy. Tools of the Trade. Energy: Tools of the Trade. Astronomers and Observatories. Fun Facts. Phenomena, Myths and Fallacies. Astronomical Firsts Types of Stars. There are many different types of stars in the Universe, from Protostars to Red Supergiants. They can be categorized according to their mass, and temperature.. Stars are also classified by their spectra (the elements that they absorb). Along with their brightness (apparent magnitude), the spectral class of a star can tell astronomers a lot about it Those are from the galaxy order, for example euclid is the first, calypso is the third galaxy, Budullangr is the 7th and eissentam is the 10th. When you switch galaxy by going through the center, you go to the next one in the order, when you switch galaxy by picking the colored orbs, you go to the next one in the order that matches that type

List of galaxies - Wikipedi

Types Of Galaxies, Illustration is a photograph by Spencer Sutton which was uploaded on December 14th, 2014. The photograph may be purchased as wall art, home decor, apparel, phone cases, greeting cards, and more. All products are produced on-demand and shipped worldwide within 2 - 3 business days The most common type of galaxy is called a spiral galaxy. Not surprisingly, spiral galaxies look like spirals, with long arms winding toward a bright bulge at the center. But be careful - if you looked at a spiral galaxy from the side, you could mistake its shape for a circle, and so you'd have to use other criteria to learn it was a spiral

Hubble&#39;s deepest view ever of the Universe unveilsObserver des Galaxies Lointaines – Sur Son OrdinateurHubble reveals a new class of extrasolar planet | ESA/Hubble

The larger, brighter galaxies are easy to identify: they are patches of light with a rich range of forms, from ellipticals to spirals. The much more numerous, fainter galaxies are harder to find. Look for images that are fuzzier and lower-contrast than the point-like stars. Galaxy Classification. Many different types of galaxies exist The automated detection of galaxies types is very important to understand the physical properties of the past, present, and future of the universe, while also offering a means for identifying and. Our galaxy, the Milky Way, is a barred spiral galaxy and its arms are sometimes visible from Earth. Image credit: Anton Jankovoy. There are four types of galaxies: elliptical, spiral, barred spiral, and irregular. Most galaxies are between 1 to 100 parsecs away and 3 to 300 light-years in diameter