A light-year is a distance covered by light in one year at a speed of 300000000 m/s. The diameter of the Milkyway is huge it becomes a bit difficult to talk in terms of kilometers, in astronomy and astrophysics we usually measure distance in terms of light-years. Then there are other stars, dust clouds, Nebulae, etc which all orbit around the supermassive Black hole forming the galaxy we know as the milky way. So far we have covered 287.46 billion km, which is the radius of the solar system. ![]() ![]() The solar system extends further to the orbit of Neptune racing past the Kuiper belt through the Oort cloud finally leading into interstellar space. To put this thought into perspective let us all have a look at some numbers, We live on the planet Earth which is almost 13,000 km in diameter orbiting the Sun which on an average is 150 million km away from us. ![]() The universe is vast with several massive events, and as you read this it’s expanding every second, compared to the size of the universe we are very insignificant.
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