Curiosities, games, challenges and quiz on various topics
We know what a light year is: a unit of length that indicates the distance traveled by light in one year. Light develops a speed of 300,000km/s, which means that, in one second, it travels 300,000km. So, in one year, it travels 9,460,800,000,000Km, more than 9 trillion kilometers! When someone says that a galaxy is 10 light years away from Earth, it means that it is at a distance of 90 trillion kilometers
