world development and scientific research

  A Meteor Shower: What Is It? You won't need a telescope, binoculars, or a tall mountain to have a "star gazing" party if a meteor shower is a forecast. A warm sleeping bag and an alarm clock to wake you up in the middle of the night can be necessary. The best place to watch a show, though, is simply by lying down in your own backyard. Meteors A meteoroid is a space rock that enters the atmosphere of Earth. The air on the space rock creates drag, which causes it to heat up as it falls toward Earth. A "shooting star" is what we can see. The glowing hot air that can be seen as the hot rock flies through the atmosphere, not the rock itself, is what is causing that light streak. We refer to a meteor shower as the simultaneous collision of several meteoroids with Earth. Why would there be a lot of meteoroids hitting Earth at once? Comets orbit the sun in a similar manner to Earth and the other planets. The orbits of comets are typically very lopsided, in c...

Why Do Craters Exist on the Moon? Because Earth is far larger than the Moon, a meteoroid has a larger area to impact, increasing the likelihood that it may collide with the planet. On the other hand, we only know of roughly 180 craters on Earth but we can see thousands on the Moon! How come? In actuality, during the course of their lengthy 4.5 billion-year histories, both the Earth and the Moon have been struck numerous times. Where did all the craters on Earth vanish? The primary distinction between the two is that Earth possesses mechanisms that may virtually completely wipe out any traces of previous collisions. Moon doesn't do that. On the Moon's surface, very much any small ding will remain there. Earth's surface is kept clear of craters thanks to three mechanisms. The first one is known as erosion. Plants, water, and weather all exist on Earth. Together, these cause the ground to deteriorate and disintegrate. Over time, erosion can reduce a crater to almost ...