Explaining the Drake equation
By: D. Vogt
The Drake Equation, also known as the Green Bank Equation after the 1961 conference where it was first presented, is a formula created by American physicist Frank Drake to estimate the number of intelligent alien civilizations which exist in the Milky Way and which, given...
What happens at the Vernal Equinox?
By: Megan Stoddard
At the vernal equinox, the earth, which tilts on its axis so that one of its hemispheres is usually closer to the sun than the other, stands up straight. From our viewpoint here on earth, the sun rests directly over the equator. It has been...
Black holes in Space
By: Toni Gabucci
Black holes- Do they even exist? Even though black holes have finally achieved acceptance in the public mind, there have still been questions regarding the existence and characteristics of black holes among the scientists. The “Classical” concept of a black hole is a star...
The uses of helium
By: Jacob Stanley
While helium is the second most common element in the universe, on Earth it isn't as easy to come by. Because it is a noble gas, it is unreactive and will generally not form compounds with other elements. When released into the atmosphere, most of...
By: Lawrence George
The Milky Way galaxy is our home. While we may think it is just Earth and the Sun, and maybe the planets of the Solar System too, we are members of a family of stars some 100 000 light years across, along with perhaps 400...
Do you believe that aliens have already visited our planet?
By: Lee Pringle
Aliens Part 1: Why we should fear them. Arthur C Clarke said any sufficiently advanced technology is indistinguishable from magic, and magic is what Gods do. Our history is littered with reports of angels or spirits descending down to the Earth from the heavens. Why...
By: Joshua Horn - 257112
Batteries are a nearly US$50 billion industry worldwide and are a necessary component of gadgets and toys worldwide. At the heart of the battery is the voltaic cell, an electrochemical system that generates an electrical current by taking advantage of the electron movement between different...
Classifying radioactive decay
By: Mishra Planeswalker
In the world of nuclear physics, there are numerous methods of radioactive decay which an element can undergo. Each of these has different implications for the element and its surroundings. These different types of decay can explain why multiple instances of the same element or...
What to do if you see a UFO
By: Dyana Hepburn
What to do if you see a UFO depends on many different factors. Over the years I have seen many unusual aerial phenomena, some of which are beyond all doubt unidentified flying objects (UFOs). I have described my encounters with UFOs to groups, talked about...
By: Alison Bowler
Helium (He), the second element in the periodic table has a very stable atomic structure. It is the second most common element in the universe with an abundance of 72,000,000 ppb by atoms. Only hydrogen is more common. Helium atoms have an atomic...

 

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