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.
|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)|