The universe is far greater than human imagination and always full of mysteries and wonders. But what is there, and where have we come from, and what is that bright band in the night sky that the people who look up into the nighttime sky might be able to see. The ancient Greeks believed it was the milk spilled by the goddess Hera, as Hera's motherly milk sprayed out into the heavens, creating the Milky Way.
About 2000 years later, Galileo's telescope showed that this is the Milkyway, a bunch of thousands of millions of distant stars. The true significance of Galileo's discovery came in the 20th century when the Hitech Telescopes were made, which peered into the depths of space from the Earth's surface and its orbit. They showed us the right way to peep into this unique world of light and darkness, and we saw clouds of dust, gas, and countless stars.
Scientists believe that we are surrounded by about 300 billion stars and one of them is the Sun, along with its planets. But why do they appear dimly in the night sky, and why don't the stars in our sky spread out in the same proportion? To know the answer, we have to look beyond 300 billion stars into intergalactic space, because what we see there will not be about a single star, but we will be looking at the entire galaxies and there will be billions of stars in each. Most of them are disc-shaped galaxies with spiral arms.
Also, standing on the earth, when we look at the sky at night, we see a bright strip of light that is actually our galaxy in the shape of a disk, the Milkyway, with its spiral arms intersecting each other.
0 comments:
Post a Comment