Currently, Andromeda and the Milky Way are about 2.5 million light-years apart. Fueled by gravity, the two galaxies are hurtling toward one another at 402,000 kilometers per hour. Astronomers can use the Sun's orbital motion to calculate the mass of the galaxy within a radius of 8.5 kpc from the Milky Way's center. The result is about 10 11 solar masses or 100 billion times the mass of the Sun. By using information from radio and optical surveys, we can plot the average circular velocity of material at a variety of Let us assume that our galaxy consists of $$2.5\times 10^{11}$$ stars each of one solar mass. How long will a star at a distance of 50,000 ly from the galactic centre take to complete one revolution ? Taken the diameter of the Milky way to be $$10^{5}$$ ly.
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  2. Щοπе ዢօзιцոпու
Our solar system is about 73,000 light-years from the nearest edge of the Milky Way, which is some 100,000 light-years in maximum diameter (although fringe stars exist out to 180,000 light-years).
2023 Milky Way Season Trip Planner. The Milky Way is one of my favorite subjects to photograph! It is constantly changing in appearance throughout the year, creating a variety of interesting shooting situations. But figuring out the best time to shoot the Milky Way isn’t always so easy. The rise and set times are constantly changing, and the
The disk of stars in the Milky Way is about 100,000 light years across and the sun is located about 30,000 light years from the galaxy's center. Based on a distance of 30,000 light years and a speed of 220 km/s, the Sun's orbit around the center of the Milky Way once every 225 million years. The period of time is called a cosmic year. Even at that rate, it takes about 250 million years to travel once around the Milky Way. The last time our 4.5-billion-year-old planet was in this same spot, continents fit together differently
The Galactic Center is the rotational center, the barycenter, of the Milky Way galaxy. [1] [2] Its central massive object is a supermassive black hole of about 4 million solar masses, which is called Sagittarius A*, [3] [4] [5] a compact radio source which is almost exactly at the galactic rotational center. The Galactic Center is approximately
The Milky Way captured using a Canon Rebel DSLR and a Rokinon 14mm F/2.8 lens. The Best Time to Photograph the Milky Way. From mid-northern latitudes, the best time to photograph the Milky Way core is between the months of May to September. For the best possible shot, you’ll want to take your photo well away from the city light pollution.
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  • milky way revolution time