Question

(a) What is the ratio of the distance to the nearest galaxy to the diameter of the Milky Way Galaxy? This is typical of the distances between galaxies as compared to their diameters.

dG

dMW

=  

(b) What is the ratio of the Earth's distance to the nearest galaxy to the Earth's distance to the Sun?

dG

dSun

=  

(c) What is the ratio of the diameter of the Milky Way to the Earth's distance to the Sun?

dMW

dSun

=

Answer 1

9,500,000,000,000*169000/(1x10²¹ m) / 6.7 x 10⁹ AU (one light year =9,500,000,000,000)(169000 isThe Large Magellanic Cloud is in the constellation Tucana and is about 169,000 light years away)

(b) A nearest galaxy from eart "People in the Northern Hemisphere can see the Andromeda Galaxy, which is about 2 million light years away." The distance from Earth to Sun is listed as 150 million km. Multiply by 1000 m/km to get 150,000,000,000 meters = 1.5x10¹¹ meters.

(c)Diameter of the Milky Way Galaxy is about 946073047258080000 km
Diameter of the Earth at equator is 12756.2 km
Ratio= 74165742717900
sizes of sand grains vary from 1/16mm to 2mm so you get a range of 4,635,358.9198688 km to 148,331,485.4358 km which is far larger then the Earth.

The sun is 864,000 miles in diameter and the earth average diameter is 7917.52. Diameter-wise, the ratio is 1 : 109 earth to sun diameter. Using the first set of figures, the sun's volume is 3.4 x 10^17 and the earth's is 259.875974 x 10^9. Looks like the ratio would be 1 : 1,308,316 earth to sun by volume.