https://en.wikipedia.org/wiki/Galaxy
A galaxy is a system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity. The word is derived from the Greek galaxias (γαλαξίας), literally 'milky', a reference to the Milky Way galaxy that contains the Solar System.Galaxies, averaging an estimated 100 million stars, range in size from dwarfs with less than a thousand stars, to the largest

https://science.nasa.gov/universe/galaxies/
Learn about galaxies, their types, shapes, sizes, ages, and features. Find out how galaxies are organized into groups, clusters, and superclusters, and what is our home galaxy, the Milky Way.

https://en.wikipedia.org/wiki/List_of_galaxies
Size (left) and distance (right) of a few well-known galaxies put to scale. The following is a list of notable galaxies.. There are about 51 galaxies in the Local Group (see list of nearest galaxies for a complete list), on the order of 100,000 in the Local Supercluster, and an estimated 100 billion in all of the observable universe.. The discovery of the nature of galaxies as distinct from

https://hubblesite.org/science/galaxies
Galaxies are vast cosmic islands of stars, gas, dust, and dark matter held together by gravity. Hubble's keen eye has revealed intricate details of the shapes, structures, and histories of galaxies — whether alone, as part of small groups, or within immense clusters. From supermassive black holes at galactic centers to giant bursts of star

https://spaceplace.nasa.gov/galaxy/en/
The Hubble Space Telescope looked at a small patch of space for 12 days and found 10,000 galaxies, of all sizes, shapes, and colors. Some scientists think there could be as many as one hundred billion galaxies in the universe. This is a picture taken by the NASA's James Webb Space Telescope showing thousands of galaxies.

https://www.britannica.com/science/galaxy
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. Nature has provided an immensely varied array of galaxies, ranging from faint, diffuse dwarf objects to brilliant spiral-shaped giants.

https://www.nationalgeographic.com/science/article/galaxies
Learn about the types, origins, and features of galaxies, the sprawling systems of stars and dark matter held together by gravity. Find out how galaxies evolve, interact, and merge over time, and how they are classified by astronomers.

https://science.nasa.gov/universe/galaxies/types/
Types of Galaxies Scientists sometimes categorize galaxies based on their shapes and physical features. Other classifications organize galaxies by the activity in their central regions - powered by a supersized black hole - and the angle at which we view them. Spiral Galaxies Our Milky Way is one example of a broad class of galaxies […]

https://www.astronomy.com/science/galaxies/
Galaxies. Galaxies are vast collections of stars, gas, dust, and dark matter bound together by gravity. There are hundreds of billions of galaxies in the universe. Galaxies, Science, Stars.

https://www.space.com/15680-galaxies.html
Galaxies are composed of stars, dust, and dark matter, all held together by gravity. They come in a variety of shapes, sizes, and ages.

https://webb.nasa.gov/content/science/galaxies.html
Learn how galaxies form, evolve and interact over cosmic history with the help of NASA's James Webb Space Telescope. Explore images, videos and key concepts of galaxy types, shapes, black holes and dark matter.

https://earthsky.org/astronomy-essentials/definition-what-is-a-galaxy/
Learn what a galaxy is, how many galaxies are in the universe, and how to classify them based on their shape and appearance. See stunning images of galaxies from the Webb telescope and other sources.

https://www.britannica.com/summary/galaxy
Learn about the size, composition, and structure of galaxies, the systems of stars and interstellar matter that make up the universe. Explore the different galactic types, such as spiral, elliptical, irregular, and radio galaxies, and see images of some examples.

https://science.nasa.gov/mission/hubble/science/universe-uncovered/hubble-galaxies
Galaxies are the visible foundation of the universe; each one a collection of stars, planets, gas, dust, and dark matter held together by gravity. Hubble's observations give us insight into how galaxies form, grow, and evolve through time. Credit: NASA's Goddard Space Flight Center; Lead Producer: Miranda Chabot; Lead Writer: Andrea Gianopoulos.

https://www.space.com/galaxy-types-and-formations
Galaxies are glittering cities, massive metropolises full of stars, dust, gas, black holes, magnetic fields, cosmic rays, dark matter and more. Separated by millions of light-years of essentially

https://webbtelescope.org/science/galaxies-over-time
The Antennae Galaxies/NGC 4038-4039. The two spiral galaxies started to interact a few hundred million years ago, making the Antennae galaxies one of the nearest and youngest examples of a pair of colliding galaxies. During the course of the collision, billions of stars will be formed. The brightest and most compact of these star birth regions

https://www.livescience.com/galaxy
Spiral galaxies form stars at a moderate rate and typically have a mass similar to the Milky Way. When including all the stars, gas, dust and dark matter, a spiral galaxy is around 1 trillion

https://www.bbc.com/news/science-environment-62259492
Some of these galaxies existed a mere 600 million years after the Big Bang. Webb is taking some incredible pictures: "This might be the most important telescope ever". Webb, with its 6.5m-wide

https://www.nasa.gov/universe/new-3d-visualization-highlights-5000-galaxies-revealed-by-webb/
Watch a video of Webb's 3D visualization of galaxies from the CEERS Survey, which covers a region of the sky observed by Hubble. See how galaxies change over time and space, from nearby to distant, and discover Maisie's Galaxy, a new and early galaxy.

https://imagine.gsfc.nasa.gov/science/objects/galaxies1.html
Learn about galaxies, their types, shapes, sizes, and how they interact with each other. See stunning images of galaxies from the Hubble Space Telescope and other telescopes.

https://www.cfa.harvard.edu/research/topic/galaxy-formation-and-evolution
Learn how galaxies form and evolve from the Center for Astrophysics, a research institution that studies the cosmos. Explore topics such as spiral arms, mergers, black holes, and gravitational lensing.

https://www.amnh.org/explore/ology/ology-cards/085-galaxies
Galaxies. A galaxy is a giant, spinning object made of gas, dust, and stars held together by gravity. Galaxies come in different shapes and sizes and can contain billions of stars. Most occur in groups that are also held together by gravity. We now know that the Universe has billions of galaxies, and the Milky Way is only one of them.

https://www.livescience.com/space/cosmology/the-early-universe-is-nothing-like-we-expected-james-webb-telescope-reveals-new-understanding-of-how-galaxies-formed-at-cosmic-dawn
Usually, galaxies from such an early time emit light that is far too faint to be detected by telescopes. But a phenomenon called gravitational lensing can help astronomers view them.

https://science.nasa.gov/universe/galaxies/evolution/
Learn how galaxies form, grow, and change over time, from the earliest stages of the universe to the present day. Explore images and facts about spiral, barred, colliding, merging, and ring galaxies, and their black holes.

https://www.space.com/supermassive-black-holes-winds-quasars
Astronomers have measured supermassive black hole winds that existed when the universe was less than a billion years old, showing how these cosmic titans shape galaxies.

https://phys.org/news/2024-06-revived-technology-individual-photons-distant.html
Using an instrument on the 4.1-meter Southern Astrophysical Research Telescope, researchers have obtained the first astronomical spectrum using skipper charge-coupled devices (CCDs).

https://www.sciencedaily.com/releases/2024/06/240628124950.htm
Too many missing satellite galaxies found Date: June 28, 2024 Source: Tohoku University Summary: Bringing us one step closer to solving the 'missing satellites problem,' researchers have

https://www.smithsonianmag.com/science-nature/this-revolutionary-new-observatory-will-locate-threatening-asteroids-and-millions-of-galaxies-180984514/
Studying this distribution of galaxies can provide clues about the abundance and distribution of dark matter—an unknown substance that holds galaxies and galaxy clusters together—which,

https://newscenter.lbl.gov/2024/06/25/revived-technology-used-to-count-individual-photons-from-distant-galaxies/
Skipper CCDs can get down to very low noise levels, which helps astronomers see distant galaxies. "We had previously developed skipper CCDs for dark matter detection, and this is the first successful transition of that technology to image faint astronomical objects," said Steve Holland, a senior engineer in the Physics Division at the

https://www.msn.com/en-us/news/technology/i-tried-the-first-smartphone-based-telescope-and-got-next-level-photos-of-the-moon-next-up-galaxies-and-nebulae/ar-BB1p6NPw
You get a list of galaxies, nebulae and distant planets, together with info about which ones are visible based on your time and location. However, the hard work of locating those deep-space