A few days ago, we had an interesting science class. We were trying to answer the question, how big is the universe?

So, how big is the Universe? First, we need to know the planets in the universe.  The sun, the closest planet to the sun is Mercury, then Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and at last Pluto.

And in class our job was to find the scale distances of each planet from the “Sun”. We used a special type of ruler to measure.

From the data below, we can see that the scale distance from the sun ranges from 11.6 to 1180. The distance of the two planets seem like they only have 1168.4 apart. But when you imagine it, it’s actually very far apart.

Pluto, the farthest planet from the sun in our solar system, is 118000 apart from the sun. We can’t even imagine the distance on Earth. For us, taking a 1km walk is a long distance, but it can definitely not compare with the distance in space. Our solar system might just be a tiny part of the galaxy. One day, we will discover more.

 1 2 3 4 5 6 7 Planet Real Planet diameter (cm) Our scale diameter (cm) Mean distance from sun (km) Scale distance from sun (cm) Scale distance from sun (meters) Travel distance (seconds) Sun 1,392,000 27.840 xx xx xx xx Mercury 4,900 0.098 58,000,000 1160 11.6 193.3333333 Venus 12,100 0.242 108,000,000 2160 21.6 360 Earth 12,800 0.256 150,000,000 3000 30 500 Mars 6,800 0.136 228,000,000 4560 45.6 760 Jupiter 142,800 2.856 778,000,000 15560 155.6 2593.333333 Saturn 120,000 2.4 1,427,000,000 28540 286.4 4756.7 Uranus 51,000 1.02 2,870,000,000 57400 574 9566.7 Neptune 48,600 0.972 4,500,000,000 90000 900 15000 Pluto (NLAP) 3,000 0.06 5,900,000,000 118000 1180 19666.7