A voyage from St. Mark's Square in Venice/Italy to the edge of the visible universe...
Each circle is 10 times larger than the one before:
1 meter = 1,09 yards
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10^0 = 1 meter = the hula hoop
10^1 = 10 m = the crowd around the hula hoop
10^2 = 100 m = St. Mark's Square
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1 kilometer = 1000 meters = 0,62 miles
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10^3 = 1 kilometer = Venice's city center
10^4 = 10 km = all the islands of Venice
10^5 = 100 km
10^6 = 1.000 km = everything from central Germany to the southern end of Italy
10^7 = 10.000 km = almost earth's diameter
10^8 = 100.000 km = 1/4 of the distance between earth and our moon
10^9 = 1.000.000 (one million) km = 2/3 of the sun's diameter
10^10= 10.000.000 km
10^11= 100.000.000 km = 2/3 of the distance between earth and sun
10^12= 1.000.000.000 (one billion) km
10^13= 10.000.000.000 km = the diameter of our entire solar system
10^14= 100.000.000.000 km
10^15= 1.000.000.000.000 (one trillion) km
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1 lightyear = 9.460.528.000.000 kilometers = 5.878.499.562.555 miles
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10^16= 1,06 lightyears = would take modern spacecrafts 20.000 years to travel
10^17= 10,6 ly = twice the distance to our neighbor stars
10^18= 106 ly
10^19= 1.060 ly
10^20= 10.600 ly
10^21= 106.000 ly = diameter of our galaxy, including 100 billion stars
10^22= 1.060.000 (one million) ly
10^23= 10.600.000 ly
10^24= 106.000.000 ly
10^25= 1.060.000.000 (one billion) ly
10^26= 10.600.000.000 ly
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13,7 billion lightyears = size of the visible universe
78.0 billion lightyears = estimated size of the whole universe which is the same as 737.921.184.000.000.000.000.000 kilometers or 458.522.824.023.264.000.000.000 miles...
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A spaceship with todays technology would take almost two hundred billion years to reach only the "edge" of the visible (!) universe...
if it wouldn't expand with the speed of light which is 18.000 times faster than our spaceship...
Because it is, no matter what technology is used, physically impossible to travel with the speed of light (the mass of any body traveling with that speed would increase to infinite requiring infinite amounts of fuel to move) we will never be able to reach any edge or border of the universe...
