By: Alison Bowler
Potassium Symbol: K Atomic Number: 19 Atomic Mass: 39.0983 amu (atomic mass units) Melting Point: 63.65 C (336.8 K, 146.57 F) Boiling Point: 774.0 C (1047.15 K, 1425.2 F) Number of Protons: 19 Number of Electrons: 19 Number...
By: John Traveler
In Greek mythology, the Phoenix is a bird of bright and colorful plumage that builds a nest of myrrh twigs, and lays a single egg in it. The nest catches fire, but the bird will not leave her egg and is reduced to ashes along...
By: John Traveler
Heinrich Hertz was a German physicists who propelled the human understanding of electromagnetic radiation forward in leaps and bounds. Using a spark gap to essentially transmit electromagnetic radiation (EMR) energy, and receiving the signal across the room with an antenna, Hertz produced the first human...
By: Imonikhe Ahimie
In 1993, the United States Congress stopped funding for a project which the National Aeronautics and Space Administration, NASA, had embarked upon in the previous year. The Microwave Observing Program, MOP, had been conceived as a long term project which would address a major problem...
By: Janet Grischy
When the dinosaurs disappeared, so did numbers of plant and animal species. That was not the only major extinction however. There have been five in the past 600 million years. The asteroid theory is one explanation of what caused them. It is a controversial hypothesis...
By: Alison Bowler
Calcium Symbol: Ca Atomic Number: 20 Atomic Mass: 40.078 amu (atomic mass units) Melting Point: 839.0 C (1112.15 K, 1542.2 F) Boiling Point: 1484.0 C (1757.15 K, 2703.2 F) Number of Protons: 20 Number of Electrons: 20 Number...
By: Alison Bowler
Oxygen Symbol: O Atomic Number: 8 Atomic Mass: 15.9994 amu (atomic mass units) Melting Point: minus 218.4 C (54.750008 K, minus 361.12 F) Boiling Point: minus 183.0 C (90.15 K, minus 297.4 F) Number of Protons/Electrons: 8 Number...
An overview on optical SETI experiments
By: Imonikhe Ahimie
The Search for Extraterrestrial Intelligence, SETI, has been ongoing for almost half a century and in that time most of the attempts to make some kind of contact with any putative extraterrestrial intelligences have been by means of radio i.e. searching the skies...
By: John Traveler
That first step Neil Armstrong took on the Moon, might well be considered the most remarkable achievement in the history of the human species. It was the first step in a human odyssey to go beyond the bounds of our own small blue planet and...
By: Alison Bowler
Sulfur Symbol: S Atomic Number: 16 Atomic Mass: 32.066 amu (atomic mass units) Melting Point: 115.21 C (388.36 K, 239.38 F) Boiling Point: 444.6 C (717.75 K, 832.28 F) Number of Protons: 16 Number of Electrons: 16 Number...

 

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