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Galaxies are flat because of the way gravity and angular momentum interact during their formation. As gas and dust collapse to form a galaxy, the rotation causes it to flatten out into a disk shape. This rotation helps balance the inward pull of gravity, resulting in a flat, disk-like structure.
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How does the density of galaxies change as the universe expands?
As the universe expands, the density of galaxies decreases. This is because the space between galaxies increases as the universe expands, leading to a lower concentration of galaxies in a given volume of space.
Is there an infinite number of galaxies in the universe?
Yes, there is believed to be an infinite number of galaxies in the universe.
Do galaxies have black holes in the center?
Yes, many galaxies have supermassive black holes at their centers.
What are peculiar velocities and how do they differ from the overall motion of galaxies in the universe?
Peculiar velocities are the individual speeds at which galaxies move within the universe, separate from the overall expansion of the universe. They differ from the general motion of galaxies because they are influenced by local gravitational interactions between galaxies.
Do all galaxies have a black hole at their center?
Not all galaxies have a black hole at their center. Some galaxies, like our own Milky Way, do have a supermassive black hole at their center, while others do not.
What are similarities between elliptical and spiral galaxies?
While spiral galaxies are bright, elliptical galaxies are dim. Spiral galaxies are hotbeds of star formation, but elliptical galaxies aren't nearly as prolific because they contain less gas and dust, which means fewer new (and brighter) stars are born
Do galaxies all have the same shape?
Galaxies may have any of four general shapes. Elliptical galaxies show little or no structure and vary in general shape from moderately flat and round or oval to spherical. Spiral galaxies have a small, bright central region, or nucleus, and arms that come out of the nucleus and wind around, trailing off like a giant pinwheel. In barred spiral galaxies, the arms extend sideways in a short straight line before turning off into the spiral shape. Both kinds of spiral systems are flat. Irregular galaxies are usually rather small and do not have a symmetrical shape.
If scientists have ony seen a galaxy like as a flat object on the side or whatever how can they make predictions and drawings of galaxies if they have never seen them?
they don't see it flat they actually go out into the space and look at the galaxies, milky ways and more in the solar system.
What evidence can you cite that the universe is flat How does that compare to previous beliefs about the universe?
The universe isn't flat. It is 3-Dimensional time and space. Galaxies are depicted as being donut shaped and flat
What are the classes of galaxies?
Galaxies are primarily classified into three main categories: spiral galaxies, elliptical galaxies, and irregular galaxies. Spiral galaxies, like the Milky Way, feature a flat, rotating disk with spiral arms and a central bulge. Elliptical galaxies are more rounded and lack the distinct structure of spirals, often appearing as smooth, featureless ellipsoids. Irregular galaxies do not fit into the other two categories and have an irregular shape, often resulting from gravitational interactions or collisions with other galaxies.
Is are galaxy flat?
No, galaxies are three dimensional. Do you mean are there galaxies without a bulge in the center? That answer is yes. Some are shaped like balls, some have irregular shapes, and the rest (which is really most of them) are shaped like discs. Almost all disc-shaped galaxies have a bulge in them, but there are a few that do not have any bulge at all- they are flat discs. Just like a CD.
Three quarters of all known galaxies are what galaxies?
That is a difficult question to fully answer as types of galaxies are not fully defined. A ball park figure would be dwarf galaxies, or spiral galaxies depending on the area in question. See related question for a full breakdown.
What are three types of galaxys?
The three different types of galaxies are the Spiral galaxy, the Elliptical galaxy, and the Irregular galaxy. Spiral galaxies are obviously in the shape of a spiral, elliptical galaxies are shaped as an ellipse, or a flat circle, and irregular galaxies can be any shape.
How are the shapes of the milky way and the Andromeda galaxy related?
Both the Milky Way and the Andromeda galaxies are flat spirals in shape.
What are the three different types of Galaxy Which one do we live in?
The three main types of galaxies are spiral, elliptical, and irregular galaxies. Spiral galaxies, like the Milky Way, have a flat, rotating disk with arms that spiral outward, while elliptical galaxies are more rounded and featureless. Irregular galaxies lack a distinct shape and often result from gravitational interactions. We live in the Milky Way, which is classified as a barred spiral galaxy.
What are the 3 common galaxies?
galaxie 1, 2, 3, 4 and 5
How are the shapes of the Milky Way Galaxy and the Andromeda Galaxy related?
Both the Milky Way and the Andromeda galaxies are flat spirals in shape.
