Differences between asteroids and comets
By: Pat Jacobs
A comet is an object that resembles a fuzzy star; most travel through the solar system on an elliptical (oval or egg shaped) orbit. The time it takes a comet to make a complete orbit is called its period (Some have short periods of less...
Reflections on the existence of UFOs
By: Dyana Hepburn
I often reflect upon the who, what and why of the unidentified flying objects (UFOs). I know that they exist because I have experienced a close encounter directly overhead as I stood in my back yard in North Hollywood, California. I was very young then...
By: Alison Bowler
Man has known of the yellow non-metallic element sulfur since antiquity. Found in its native state around volcanic vents one of its early uses was as an insecticide. The Greek poet Homer mentioned the insecticidal properties of sulfur in his writings 2800 years ago. The...
By: Lee Petersen
The equation E = mc^2 is a pretty important equation in physics. Not many people would learn about it in a general physics class in high school or even college general physics class. However, it is probably the most known equation in the world. E...
By: N. David
When something rises in temperature, we say it has gotten hotter. It seems pretty straightforward. A higher temperature means more heat, so heat and temperature are the same thing, right? It's not quite as simple as that. Yes, heat and temperature are strongly related, but...
By: Ussama Qadri
How a mass spectrometer works Mass spectrometer works on the technique of mass spectrometry in which basic composition of an element or molecule could be calculated. In order to understand the basic working principle of a mass spectrometer we need to understand the process an...
Planet facts: Uranus
By: David Cardoso
Uranus has the funniest name among the planets in our cosmic neighborhood. But after the tired jokes fade away, some interesting facts can be elucidated from this fascinating planet named after the Greek god of the sky. On March 13th, 1781 William Herschel discovered Uranus...
By: Wes Kelly
As technologies jet aircraft, rockets and nuclear energy emerged in the mid-20th century out of the terrible strife of World War II. Not an auspicious beginning, certainly enough, but commercial aviation depends on jet aircraft; industrialized countries derive significant fractions of their electrical power...
By: John Traveler
Some writers may approach this question from a philosophical perspective, others entwine it in notions of religious belief. But when the question is asked in the strict context of what is scientifically possible, neither philosophical postulates nor religious beliefs can meet the scrutiny required by...
By: Alison Bowler
Copper (symbol Cu), known for thousands of years, about 5,000 ago led man out of the Stone Age and into the Bronze Age. When combined with up to 25% tin copper forms the alloy bronze. Another early copper containing alloy, made at least 2...

 

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