Isn't the diameter of the Milky Way 80000 light years? Or 100000 light years

Isn't the diameter of the Milky Way 80000 light years? Or 100000 light years

The answer is 100000 light years
The galaxy is the star system of the solar system, including 120 billion stars, a large number of star clusters, nebulae, and various types of interstellar gas and interstellar dust. Its diameter is about 100000 light-years, its central thickness is about 12000 light-years, and its total mass is 140 billion times of the mass of the sun, The sun is located on the Orion Arm of the Milky way, which is about 26000 light-years away from the center of the Milky way
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It is known that the diameter of the Milky way is 80000 light-years. Now the fastest aircraft of mankind is the space shuttle. Its speed is 8000 meters per second. If it comes from a part of the Milky way
How long does it take to fly from one end to the other?

It takes 2.4 billion years, 3 * 10 ^ 8 * 10 ^ 4 / 8000 (year) = 2.4 * 10 ^ 9 years = 2.4 billion years

It is known that the diameter of the Milky way is 80000 light-years, and the sun is 26000 light-years away from the center of the Milky way
The speed is 8000 meters per second. If he flies from one end of the galaxy to the other, how many seconds does it take? I can't write down the present supplement

First of all, one light year = 946000000000 meters. If one light year is divided by velocity, one light year will take 1182500000000 seconds to fly at the speed of existing spacecraft. If the diameter of the Milky way is 80000 light years, it will take 1182500000000 * 80000 to get 94600000000000000 seconds