The Earth is speeding through the galaxy at about 18.55 miles per second (66,780 miles per hour). That is fast!! When a car is traveling at 60 miles per hour it is destined to get bug, dirt, and other particles smooshed against the windshield. Why should the earth be any different? At that extreme speed the earth is constantly being bombarded with matter of its own (usually dust particles and other small bits of matter). Overall, due to its speed it can accumulate between 20-40 tons per day. Talk about the need to diet!!
Most of the dust serves as condensation nuclei for water molecules (rain) and falls to the ground, to be washed into oceans.
Interesting news from our planetary neighbor, Mars. For the past few years the Mars Rovers have been tredging across the rocky terrain looking for information. Information in rocks, soil, and the atmosphere.
They have provided scientists with much valuable information all pointing to the same thing… There was and is water on Mars! We have seen valleys cut on the planet (possibly cut by rivers) and layered sediments (usually deposited by running water) all providing evidence for the existance of water.
Click here to see a video showing mars
Click here to use Google Mars (a great site like google earth where you can explore the Martian Terrain yourself!!)
Click here play NASA Mars games (check it out… you can drive the Mars Rovers!!)