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The gravitational influence of mass contained within an orbit of a particular size determines the speed (and therefore period) of that orbit. So by measuring the period and size of the orbit, we can determine the mass inside the orbit. This concept works equally well for the orbits of stars and gas within spiral galaxies. By looking at the mass inside the orbit of stars or gas at different distances from the center of the galaxy, the mass of a galaxy as a function of radial distance from the center the mass of a galaxy inside radius r obtained from the rotation curve of the galaxy.
What have we learned?
In discussing the orbits of planets around a star, or the orbits of stars around the center of the galaxy, the mass inside the orbit determines, via gravity, the properties of the orbit. The difference here is that if you look at a bigger orbit (farther from the center), the mass inside that orbit is bigger than the mass inside the smaller orbit. We have to remember that the mass of the planets is insignificant compared to the mass of the star. I as well learned the expression for the mass enclosed within an orbit of radius r is M = v2r/G, where G is Newton's gravitational constant (and v is the orbital speed of a star at distance r. This formula is essentially another way of writing Kepler's Law Porb2 = constant * r3.)
What else can I help you with?
How do we know the total mass of the Milky Way Galaxy that is contained within the Sun's orbital path?
We can calculate the mass of the Milky Way by analyzing our solar system's orbit around the center of the Milky Way. The only problem is, that orbit takes about 220 million years to complete, and human beings have been observing it for less than 200. So our calculations could be - probably are! - way off.
When did Mass Effect Galaxy happen?
Mass Effect Galaxy happened in 2009.
What would be the effect on the orbital velocity of satellite if mass of satellite is double?
Doubling the mass of a satellite would result in no change in its orbital velocity. This is because the orbital velocity of a satellite only depends on the mass of the planet it is orbiting and the radius of its orbit, but not on the satellite's own mass.
When was Mass Effect Galaxy created?
Mass Effect Galaxy was created on 2009-06-22.
Does the supermassive blackhole at the center of your galaxy contain most of the mass of the galaxy?
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.
Do galaxies orbit an object?
Galaxies form groups called galaxy clusters, so they would orbit the center of mass of the galaxy clusters, just as our Solar System orbits the center of mass of our galaxy.Galaxies form groups called galaxy clusters, so they would orbit the center of mass of the galaxy clusters, just as our Solar System orbits the center of mass of our galaxy.Galaxies form groups called galaxy clusters, so they would orbit the center of mass of the galaxy clusters, just as our Solar System orbits the center of mass of our galaxy.Galaxies form groups called galaxy clusters, so they would orbit the center of mass of the galaxy clusters, just as our Solar System orbits the center of mass of our galaxy.
Are volume and mass properties of matter?
yes mass and volume are properties of matter
Has a black hole ever been in hour galaxy?
I assume you mean "our galaxy". There is a supermassive black hole, with a mass that is about 4 million times the mass of our Sun, at the center of our galaxy.
What effects orbital time?
The primary factors affecting orbital time are the mass of the objects involved, the distance between them, and the gravitational force between them. Orbital time increases with greater mass or distance, and decreases with stronger gravitational forces. The velocity of the objects also plays a role in determining the orbital time.
Which properties can be inferred from the stars orbital period?
From a star's orbital period, we can infer its distance from the object it is orbiting (based on Kepler's third law), the system's total mass (by combining other observable parameters), and potentially the star's luminosity and size if additional information is available. The orbital period can also give insights into the stability of the system and the potential presence of other planets or companions.
How can we determine the amount of mass in our galaxy?
Scientists determine the amount of mass in our galaxy by studying the movements of stars and other celestial objects. By observing how these objects move and interact with each other, scientists can calculate the total mass of the galaxy. This helps us understand the structure and dynamics of our galaxy.
What is a mass of stars called?
An isolated and distinct mass of stars is a galaxy.
