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Transcript of The Universe
this is a black hole. the black hole sucks everything near it into its black hole the gravitational pull is so strong light itself cant escape. everything sucked in powers the black hole. its life span is around 200billion years which in time our universe would be completely different then it is now black holes would be just about everywhere. black holes are made when a star collapses.
...And another astononshing thing about the universe is that we have only found out about less then 1 trillionth of a persent of what is out there... the number could even be smaller.
our planet earth wasnt always as nice as it is now...
billions of years ago the earths atmosphere was posionous toxic and unbreathable it looked like mars to be brief but the way the earth changed was sort of dramatic.
a smaller planet crashed into earth both destroyed but after this event with a period of a couple million years the two planets formed into the earth as we know it. a smaller part broke off and became our moon. now for the topic at hand. how the universe works. first i am going to explain how big is a million, billion or even a trillion. a million sheets of paper on top of eachother would be as tall as a 10 story building. a billion sheets of paper would be 8times the size of mount everest. a trillion sheets of paper on top of each other would be quarter way to the moon. for the universe all these numbers are small in a way in our milky way galaxy there is around 200billion stars. first of all our solar system is part of our galaxy the milky way galaxy. and in our galaxy there are other such things as solar systems. such as the Orion arm. now i will explain what a light year is. since space is a infinite space measureing the space with miles is rather pointless so we use light years. light travels at a speed of nearly 300,000km per second. The distance light travels in one year. 9,460,730,472,580.8 km, or about 5,879,000,000,000 miles.
The light-year is a measure of distance, not time. It is the total distance that a beam of light, moving in a straight line, travels in one year. To obtain an idea of the size of a light-year, take the circumference of the earth (24,900 miles), lay it out in a straight line, multiply the length of the line by 7.5 (the corresponding distance is one light-second), then place 31.6 million similar lines end to end. The resulting distance is almost 6 trillion (6,000,000,000,000) miles!
so basically all these big numbers and confusing equasions just say a light year is how long light travels in a year so a light year is the distance light makes in our year 365days.