The difference between meteors and meteorites
How meteorites that fall to the ground
Source of meteorites
Components meteorite
Classification meteorites
Names and dates of meteor showers
Leonids meteor
The solar system - the Oort Cloud
The Oort Cloud is a collection of icy comets far beyond Pluto. It is the farthest place from the Sun in the Solar System. The Oort Cloud marks the end of the Solar System becuase beyond it the Suns gravity is to weak to hold anything so it will be pulled away from the Sun. It surrounds the planets like a cage. The Oort Cloud is about 8 million million kilometers in diamater.
Comets heavenly Oort Cloud is a huge spherical cloud surrounding the solar system and extends for a distance of three light-years away, and is located about 30 trillion miles from the sun, this vast distance is on the edge of the attractiveness of the sun.
about one famouse astronaut
today i will talk about one famouse astronaut, it is Neil Armstrong. he is so famous because he is the first man ever to put a foot on the moon.
but armstrong wasn't only a space flyer, he was a university professor and test pilot and some other things, among them what they call United States Naval Aviator.
The solar system - asteroids and dwarf planets Foreign
If we thought that our tour of the solar system ends at the Neptune or Pluto, we may put ourselves in a very tight space and we have wronged our sun, with its strength 
and did not appreciate what the distances that separate the stars from each other.
and did not appreciate what the distances that separate the stars from each other.
Astrology and Astronomy
This article might as well be entitled "A few words about Astrology" or "Summary of the history of Astrology", but summing up in a couple of pages the global history of astrology, the first testimonies of which are found some 4000 years ago, is not a simple task! From Egyptian, Chinese, and Pre-Columbian divinatory calendars to modern Astrology, through the 15th century golden age, then the 17th century obscurantism, there is a host of things to say. Throughout the century, depending on the continent studied, astrology was perceived, accepted, and practiced in quite different ways.
Once in a Blue Moon .. Frequently Asked Questions (and their answers)
Once in a Blue Moon ... is a common way of saying not very
often, but what exactly is a Blue Moon?
According to the popular definition, it is the second Full Moon to occur in a single calendar month.
The average interval between Full Moons is about 29.5 days, whilst the length of an average month is roughly 30.5 days. This makes it very unlikely that any given month will contain two Full Moons, though it does sometimes happen.
On average, there will be 41 months that have two Full Moons in every century, so you could say that once in a Blue Moon actually means once every two-and-a-half years.
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