The Sun's history and future
By: Lawrence George
Some 4.5 billion years ago, there was nothing here but gas: a vast, swirling cloud of hydrogen and helium gas, along with particles of dust, containing heavy elements synthesized in ancient stars and supernova explosions. This cloud, several light-years across, was probably not alone...
Difference between volts and amps
By: D. Vogt
There are several measurements essential for understanding electricity, including current (or amps), voltage, and resistance. With respect to the first two of these, the basic difference between amps and volts is that amps (or amperes) are used to measure the number of electrons that are...
What happens chemically when acids and bases are mixed
By: James Johnson
What happens chemically when acids and bases are mixed? If general the two cancel each other out and you end up with salts and water! What happens chemically when you mix acids with bases? You can get strange smells and hot solutions, and some can...
Chemistry experiments for elementary school students
By: James Johnson
Science is important for understanding how the physical things in the universe work. The more we understand science, the better we will be able to use the things we have. It is also important to note that younger children learn most things quicker than we...
Iridium flares: Fascinating night sky viewing
By: Aldrin A Wilding-West
Iridium Flares: Fascinating Night Sky Viewing There is such an array of spectacular sights to see in the night sky. Even without the aid of a telescope it is possible to see some fascinating things if you look in the right place at the right...
What is a quasar
By: D. Vogt
A quasar, or quasi-stellar radio source, is a distant, high-energy source of radio waves. Although they were relatively recently discovered (and have been studied only since the 1950s), astronomers now generally agree that quasars are the extremely dense nucleus regions of certain large galaxies, home...
Radiant energy defined
By: Nick Ford
Radiation energy, or radiation, refers to any form of energy propagated as rays, waves or a stream of particles. The term usually applies to light or other electromagnetic waves but can also be used to describe sound waves, water waves and the emissions from radioactive...
By: Ernest Capraro
Benzoyl peroxide has the chemical formula C14H10O4, and can be envisioned as a pair of benzoic acid molecules, joined together at the oxygen atoms from which the acidic hydrogen atoms are missing. Benzoyl peroxide belongs to the general class of organic peroxides. Its reactive properties...
Aurora Borealis: The Northern Lights
By: Florence Cardinal
It's mystifying. It's mesmerizing. It's the aurora borealis, or, more simply, the northern lights. This brilliant display lights up the night skies of northern Canada from Yellowknife in the Northwest Territories to the far northern reaches of Quebec. At times it even illuminates the sky...
Planet facts: Neptune
By: D. Vogt
Neptune, the eighth most-distant planet in the solar system, is unique: its existence was first calculated mathematically, before it was ever located by astronomers. As the last of the gas giants, it is now the farthest planet in the solar system (after Pluto was reduced...

 

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