Part Time Scholar

Our Moon was thought to be the only one in the solar system until Galileo discovered four celestial objects orbiting Jupiter through his telescope back in 1610. Today, we know there are many more moons in the Solar System.  Here are some that are special: Saturn's Rings Saturn's thirty plus rings are technically made of billions of moons.  They can be as small as a pebble and as big as a city.  The rings of Saturn were believed to have formed when comets pushed Saturn's early moons too close for comfort.  Those moons were ripped and shredded into pieces by Saturn's gravity, eventually forming rings of rocks and ice debris around the planet. Enceladus (Saturn) Enceladus is Saturn's sixth largest moon and is only 300 miles across.  It is one of the brightest objects in the Solar System, reflecting almost all light from the sun thanks to its ice covered surface. Saturn's gravity acts on  Enceladus' core to create active volcanic eruptions. Surprisingly th...

The 9 to 5 has prevented me from hitting full throttle on my blogging endeavours the last few months.  I may finally have struck a balance between work and blogging.  Over the next few months, I am going to write a number of posts on my favourite topic: The Universe . To start, let's look at the possibility of life on Mars.  The red planet has long been suggested as the next best rock in our Solar System to host life.  By that, I am not suggesting human-like Martians that you see on TV or the big screen (as this famous Martian image alludes). Instead it is quite likely that simple organisms might have existed back when Mars was more Earth-like. Here are some engaging arguments:  Mars water-scarred terrain - the planet has vast systems of canyons.  In fact, the "Grand Canyon" of Mars is 5 times longer and 4 times deeper than the one in the U.S. These rugged terrains suggest the forces of water and glacial ice once at work. Needless to say, w...

The Search for Extraterrestrial Intelligence, or SETI, was founded fifty ago. Here are 10 notable moments that deserve honourable mention. Interesting enough, the invention of the Drake equation was noted as one of those key moments. Of all listed candidates, my vote goes to the Arecibo Message. With our technology today, it is difficult to conceive that we will discover extraterrestrial life forms in the near future. We may as well let a technologically superior alien civilization track us down from our interstellar broadcasts. What is your favourite moment? -PTS

Ever heard of the Drake equation? Devised by Dr. Francis Drake in 1960, the equation estimates the number of extraterrestrial civilizations in our galaxy with which we might come into contact. The main purpose of the equation is to allow scientists to quantify the factors that determine the number of such extraterrestrial civilizations. The Drake equation states that: where: N is the number of civilizations in our galaxy with which communication might be possible; and R * is the average rate of star formation per year in our galaxy f p is the fraction of those stars that have planets n e is the average number of planets that can potentially support life per star that has planets f ℓ is the fraction of the above that actually go on to develop life at some point f i is the fraction of the above that actually go on to develop intelligent life f c is the fraction of civilizations that develop a technology that releases detectable signs of their existence into space L is the ...