Galaxies

Every galaxy is comprised of a massive amount of space. This space is filled with millions of planets, stars, different forms of matter such as meteors and comets. Another thing present in the milky way are black holes.

Galaxies in the local group can still be discovered because they may be small, dim, or obscured by dust, making them harder to detect. Additionally, new technologies and techniques are constantly being developed, which may lead to the discovery of previously unknown galaxies.

The universe is not destroyed, but rather it is constantly evolving and changing. The destruction of the universe is a theoretical concept that is often discussed in the context of scientific theories such as the Big Crunch or the Heat Death of the universe, but these scenarios are not guaranteed to happen.

The sun is a star, Sol to be precise. It is the star of our solar system. The other stars you see are thousands to millions of light-years (measure of distance, not time) away so they appear dimmer because they are so far away. If you lived in their solar system, Sol would appear dim in comparison.

The density of the Sun gradually decreases as you move from the center outward. In the core of the Sun, where nuclear fusion occurs, the density is very high due to the intense pressure and temperature. As you move towards the surface, known as the photosphere, the density decreases as the material becomes less compressed.

Solar System: The sun with the celestial bodies that revolve around it in its gravitational field.

Galaxy: A collection of star systems; any of the billions of systems each having many stars and nebulae and dust.

A cluster of Stars is more of a larger group of stars that are formed in the same area of a galaxy. Although in the same general area, we could be talking several light years. A Star system is on a smaller scale, where planets and stars are close enough to orbit about each other, the closeness means that the gravitational effects they have on each other are far stronger and more apparent. Our star, the sun, is the only star in our solar system, but other star systems are made up of 2, 3 or more stars that are fairly close to each other and orbit about each other.

Stars are not literal flames that can be "blown out." Stars create light through nuclear fusion in their core, so they do not need to be relit like a candle. Once a star exhausts its fuel and reaches the end of its life cycle, it may undergo changes such as becoming a white dwarf, neutron star, or even a black hole.

Galaxies come in a number of forms and are very distant being that our own galaxy is 100,000 light years across, meaning traveling at the speed of light it takes one hundred thousand years to traverse [travel across], and then between our galaxy and others there are hundreds of thousands of light years. Generally, like stars, we use light wavelengths to determine the makeup, distance and speed of galaxies, whereas for the way they look we use varying wavelengths of energy, gamma rays, x-rays, infrared, ultraviolet and so on to get varying appearances of the distant objects and hopefully get a good idea of what they look like.

Gravity is the force responsible for the formation of the solar system, the movement of objects within the solar system, and holding together stars and galaxies. It is a fundamental force of nature that acts over large distances and is essential for understanding the structure of the universe.

Almost every galaxy has a super massive black hole in its centre and this fact is widely accepted now days . Milky way galaxy also have a super massive black hole of its own, weighing more than 4 million times more than our sun's mass.

Andromeda galaxy is our nearest neighbour having a super massive black hole in its centre weighing 114 million solar masses .

No. The super massive black hole at the center of the galaxy has about 4 million times the mass of the sun while the galaxy as a whole has at leas 1 trillion solar masses. In other words the black hole at the center of the galaxy accounts for about one twenty-fifth of one percent of the galaxy's mass.

One easy way to study the formation of the solar system is to read books or watch documentaries that explain the process in a simplified manner. Online resources, such as NASA's website, also provide detailed information and visualizations to help understand the formation of the solar system. Additionally, visiting museums or planetariums that have exhibits about the solar system can offer a hands-on learning experience.

The Milky Way galaxy has spiral arms where a lot of new stars are being born, including the Orion Arm where our solar system is located. These spiral arms are regions of higher density that promote the formation of new stars due to gravitational interactions between gas and dust.

There is actually quite strong evidence for such a black hole - both from x-ray observations, and by observing the movement of nearby stars. The movements of nearby stars indicate that they are orbiting an object with about 4 million solar masses, and since this mass is concentrated in a very small space (the apoapsis of some of those stars is fairly close to the object), the only reasonable explanation, according to current astronomical knowledge, is a black hole.

The numbers of stars and their distances depended to some extent on their direction.

This helped William Herschel to work out a model for the shape or the Milky Way

Galaxy.

In fact the shape he described is not too far from our modern ideas. Unfortunately he was limited by the knowledge and technology of his time. He decided, wrongly, that the Sun must be near the centre of the Galaxy.

The black hole at the center of our galaxy, the Milky Way, is about 26,000 light-years away from Earth. It is known as Sagittarius A* and has a mass equivalent to about 4 million times that of our sun.

It is likely to be a black hole though this has yet to be confirmed.

Yes, it is true. This relationship is described by Hubble's law, which states that the velocity at which a galaxy moves away from us is directly proportional to its distance from us. This observation is a key piece of evidence supporting the expanding universe theory.

The distance from Earth to the center of the Milky Way is approximately 25,000 light-years.

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millions of black holes are in all of the galaxies, and in the center of all large galaxies is an enormous black hole that makes all the stars go around it. the power was a million times greater 350 years ago. this cycle will repeat over again.

Scientists have come to believe that there is very probably a supermassive black hole in the center of the Milky Way, and that there may be supermassive black holes at the centers of many galaxies.