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Along with shape and size which property distinguishes spiral galaxies elliptical galaxies and irregular galaxies from one another?
You can also distinguish them by the types of stars - older stars versus younger stars, and stars of different "metallicity".
Are all 100000000000 galaxies in our universe be any size and shape?
Yes, galaxies can be any size and shape.
How do scientists categorize galaxies?
Scientists categorize galaxies based on their shape and structure into three main types: elliptical, spiral, and irregular galaxies. Elliptical galaxies are smooth and featureless, spiral galaxies have distinct arms winding out from a central bulge, and irregular galaxies lack a defined shape. Additionally, galaxies can be classified by their size, brightness, and the presence of active galactic nuclei. This classification helps astronomers understand the formation and evolution of galaxies in the universe.
Are Irregular galaxies are very large.?
Yes, they are usually of a similar size range to other types of galaxies, from a few thousand lightyears across to a million or more. Their formation is often as a result of two or more galaxies colliding, or coming close to each other.
What type of galaxie is smaller and fainter than other galxies?
Dwarf galaxies are smaller and fainter than other types of galaxies. They typically contain fewer stars and have lower luminosity compared to larger galaxies like spiral or elliptical galaxies. Despite their size, dwarf galaxies can be important for understanding galaxy formation and evolution, often serving as satellites to larger galaxies.
Are space galaxies all the same size?
No, space galaxies are not all the same size. They vary widely in size, ranging from dwarf galaxies with just a few billion stars to giant galaxies containing trillions of stars. Factors such as their formation history, environment, and interactions with other galaxies contribute to these differences in size. Additionally, galaxies can change over time due to mergers and gravitational influences.
What is the process used by astronomer to estimate the number of galaxies in the universe?
They used a method called "representative sampling" to obtain their estimate. The sky is divided into sections of equal size and the number of galaxies in one section are counted. The count from that one section is then multiplied by the total number of sections in the sky
Is the size of galaxies or the space between each galaxy larger?
The space in between galaxies is far larger than the galaxies themselves.
Galaxies are categorized according to their?
size and shape
How do galaxies range in size?
From dwarfs to giants.
What is called the dwarf galaxies?
Dwarf galaxies are small galaxies that contain relatively few stars compared to larger galaxies, typically having a total stellar mass of less than a billion solar masses. They can be classified into different types, such as dwarf elliptical, dwarf irregular, and dwarf spheroidal galaxies. Despite their small size, dwarf galaxies can play a significant role in our understanding of galaxy formation and evolution, as well as dark matter. They often exist in groups or clusters and can be satellites of larger galaxies, like the Milky Way.
What galaxy don't have a distinct shape and are not symmetrical like spiral or elliptical galaxies?
Irregular galaxies do not have a distinct shape or symmetry like spiral or elliptical galaxies. They often appear more chaotic and disordered, lacking the structured appearance of other galaxy types. Irregular galaxies can vary greatly in size and are characterized by a less defined structure.
