- Bungie2
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- Intrepid Mythic Member
We believe that the universe is unbounded: this is not the same as infinite: the 2-D surface of a sphere, wrapped around a 3rd dimension, has a finite size, but has no end. If you start off in a given direction on the surface of a sphere, you could return to your start point without having to turn around -- you simply go all the way around. But wouldn't that mean the universe has an escape velocity like the earth?
1. Ever heard of a process called cold welding? It's a process when two metals are stuck together in space. Two pieces of metal without coating on them will then begin to form as one. It's not a big problem to space stations because their already coated with material from Earth.
2.Did you know the sound of the sunspots can sing? Scientists believe that sunspot activity might be the reason for the beautiful sound of stringed violins. Antonio Stradivari, a famous violin maker, made the most special violin ever in his life and it was the most beautiful sound that everyone ever heard. And the sunspots---they sound 3 times better.
3.Can you believe that Earth has at least 4 moons? In 1986, Duncan Waldron discovered an asteroid, about 5 kilometers across, that is gradually orbiting around the sun with a period of revolution that is similar to Earth and it seems to be following Earth. The three other asteroids have an unusual relationship with Earth as well. These asteroids enters Earths orbit and begins to revolve it. Of course you won't see it out at night, because it's too far away.
4.Uranus was also called George's Star. Sir William Herschel discovered Uranus and was given the honor to name it George's Star.
5.Most people think that the Big Dipper is a constellation, but it is not! It is believed to be an asterism. An asterism can be one of the brightest stars. The Big Dipper is also one of the seven brightest stars in the Great Bear constellation.
6.Ever heard of solar diet? Well, the sun loses up to a billion of grams a second due to solar winds .Solar winds are charged particles that are naturally given off by the sun. Scientists don't know why, but it has something to do with the high temperature.
7.The light hitting Earth right now is at least a third of the sun's age. When the sun's core was born, the light would travel through atoms.30,000 years ago, when the sun was at least half its size, the sunlight use to reach Earth 8 minutes because it took most of its time passing through dense particles found in the sun.
8.Did you know that the moon is slowly drifting away from us 3.8 cm every year? And the Earth is also slowing in rotation .002 seconds per day per century.
9.Our galaxy, the Milky Way, is constantly moving through space at the spinning rate of 225 kilometers a second and traveling through space at 305 kilometers. So, every second, we are moving through space at the speed of 530 kilometers per second.
10.Every day, 74 species of plants and animals become extinct. That's one every 19.5 minutes!
11. Halo: chroncles is coming out late 09