By: Tenebris
Cosmic rays are high-energy particles which originate outside the earth's atmosphere. Almost 90 percent of all cosmic rays consist of single protons (ionised hydrogen atoms), 9 percent consist of helium nuclei (alpha rays), and the remaining one percent consist entirely of electrons (beta minus rays)...
By: Nancy Houser
Professor Nalin Chandra Wickramasinghe is considered the world's leading authority on the "theory of Panspermia" and is also known for his contributions toward the "theory of cosmic dust" - stating that life on earth originated in the deepest part of space while traveling on comets...
By: Tenebris
Now that the International Astronomical Union has redefined a planet specifically as a body which is massive enough to be rounded by its own gravity (but not massive enough to cause thermonuclear fusion) and which has also cleared its neighbouring region of planetesimals, there will...
By: Cicely Richard
"Cosmic rays" is a blanket term used to describe high energy radioactive space particles that shower the Earth's surface. Science fiction writers often use the term to explain some strange phenomena in their stories or they give the heroes special powers. Thus, there are a...
By: Rex Trulove
One of the first objects in the night sky seen by the naked eye that was recognized as a planet was Jupiter. In fact, though it is almost eight times further away from the sun as is the earth, it is the fourth brightest object...
By: Nancy Houser
Albert Einstein once made a statment which said, "The most incomprehensible thing about the universe is that it is comprehensible." I wonder if he was referring to the fact that a total eclipse is actually seen by such a few people on Earth, mainly...
By: Janet Grischy
Ytterbium, symbol Yb, is a member of the lanthanoid group of elements, which were originally called the rare earths. Its atomic number is 70, meaning it has 70 protons in its nucleus. It has many isotopes, that is, many species it appears in. These species...
By: Tenebris
Our familiar North Star is Polaris, a Cepheid variable trinary star located 431.42 lightyears from earth. It is not the brightest star in the sky, having an average apparent magnitude of only +1.97; but of all the stars of the sky it has...
Identifying and understanding the North Star
By: Susan Smalls
There's nothing quite like gazing up at a starry sky on a clear night without city lights. The way those twinkling diamonds sit on their never-ending black canvas in the country is something that everyone should experience. Without the pollution of city lights, the countryside...
By: D. Victor
Generally, substances are most dense when they are in their solid state. That ice is known to float on water conclusively proves that water is an exception. We are also aware that lakes freeze from top to bottom. In order for an object to float...

 

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