Showing posts with label Magnetic Field. Show all posts
Showing posts with label Magnetic Field. Show all posts

Saturday, March 14, 2015

Saltwater Ocean in Ganymede

Based on a study entitled, "The Search for a Subsurface Ocean in Ganymede with Hubble Space Telescope Observations of its Auroral Ovals" publish by the Journal of Geophysical Research: Space Physics, NASA is reporting that Ganymede - one of Jupiter's moons and the largest in the solar system - may have a subterranean ocean of saltwater containing more water than the surface water found on Earth.
Ganymede is larger than both Mercury and Pluto, and is close to the size of Mars by three-quarters.  It was first observed by Galileo Galilei on January 7 in 1610 and was named after the mythology of a young boy who was taken to Olympus by the god Jupiter while under the form of an eagle.  This young boy which was said to be extremely beautiful would become a servant to the gods on Olympus.

The satellite has three layers with a metallic iron at the core which generates a magnetic field similar to that on Earth.  Around the core is a mantel and a shell of rock mostly comprised of ice.  Back in 1996, it was discovered by the Hubble Telescope that a thin layered atmosphere composed of oxygen existed on the moon.

However, this oxygen is not enough to support life as it exists here on Earth.  This does not mean life may have not evolved in a manner that matched the conditions found on the moon.  There may be life; microbes or more complex lifeforms which developed based on the conditions available.  Rock masses were discovered in 2004 under the icy terrain of Ganymede. The existence of these rock formations indicate the strength of the ice as it holds the rocks near the surface of the satellite and does not allow them to sink into the ocean believed to exist under the ice.

What is interesting is that Ganymede's magnetic field is intertwined with that of Jupiter's.  This causes a peculiar motion of the aurorae generated by both bodies which seems to sway.  Since salt is conductive, then another magnetic field would be visible over the area containing it as an interaction of forces takes place. This is what was discovered by the University of Cologne, Germany.  The magnetic field on Jupiter creates another field on Ganymede showing the presence of saltwater since the fields are interacting with the salt. This is described as "magnetic friction." The existence of this would hold back the swaying or rocking of the aurorae of both the moon and Jupiter. It is estimated that this saltwater ocean is about 65 miles across and about 10 times as deep as the oceans found on Earth  and is encrusted under 95 miles of ice.







Source:

http://onlinelibrary.wiley.com/doi/10.1002/2014JA020778/abstract;jsessionid=2A6AC3289B513AEE3667BF44E3135F36.f03t04

http://www.sciencedaily.com/releases/2015/03/150312112112.htm

http://news.sciencemag.org/space/2015/03/huge-ocean-confirmed-underneath-solar-system-s-largest-moon?utm_source=facebook&utm_medium=social&utm_campaign=facebook

http://www.space.com/28807-jupiter-moon-ganymede-salty-ocean.html?cmpid=514630_20150312_41984296&adbid=10152689951036466&adbpl=fb&adbpr=17610706465

http://hubblesite.org/newscenter/archive/releases/2015/09/full/

https://solarsystem.nasa.gov/planets/profile.cfm?Object=Jup_Ganymede

Sunday, February 16, 2014

Atheism is Stupid V


Astrophysicist Neil Degrasse Tyson
This is the fifth installment of my popular "Atheism is Stupid" series.  In it, I will touch upon some misconceptions atheists have regarding the universe and the uniqueness of the human species.

Atheists often claim that our universe is extremely hostile to life.  Since it is hostile to life, it is logical to conclude (according to them) that human life is not special nor does it have a unique role. They also conclude that an "intelligent designer" is not possible.  At first glance, this argument does seem to make sense despite it being a Special Pleading fallacy.


The universe is indeed hostile.  
If a human being goes into space without protection from a suit, he/she will not last very long.  The
Scene from "Total Recall"
skin will have severe burns due to the direct contact of ultraviolet rays from our sun as well as radiation from space itself.  Gasses in the body will expand causing pressure issues that will damage organs. Nitrogen in the blood will turn into bubbles causing "the bends" which is an extremely painful condition some divers experience.

Without pressure, water will begin to boil and evaporate which means saliva, tears and the water in the body will immediately begin to dissipate.  Due to lack of oxygen, the body will go into hypoxia and it will decrease in temperature as the skin turns bluish due to cyanosis.  The body will bloat and blindness will come instantly as a person looses consciousness.  Death will follow.

So who wants to take a walk in space? :-)

Space is indeed a dangerous place for human life or any life for that matter.  However, does this reality mean that there is no God?  Does this mean that God is not perfect?  Absolutely not!

As I wrote in my post "Evidence for God I:"

"While some astrophysicists such as Neil Degrasse Tyson claim that the universe is harsh and hostile to human beings, this does not take away from the fact that human beings exist in an environment that caters to them. The anthropic principle is an indication of this. 
Yes there are parts of the universe that are hostile to human beings; however, this is not because these parts somehow exist to destroy us but because we were not meant to exist in them. For example, fish are designed to exist solely in water. If a fish goes out of its element, it will die. Similarly, human beings are designed to exist solely on Earth within the troposphere. Logically speaking, they will indeed suffer or die if they step outside of this habitable zone. 
Interestingly enough, we have the brains that allow us to defy this “prison” and go beyond it into outer space. That begs the question, why? It would seem that our brains too were designed to figure out how to counter any harsh situations nature may throw at us. The existence of harsh environments does not mean there is no intelligent design. Rather, it shows there is specificity in the design."
Furthermore, let us take into account some instances in which intelligent intention is present in regard to the design and function of the universe and preservation of life.


EARTH'S OUTER BODYGUARDS
The outer planets such as Jupiter protect Earth from impacts from asteroids and other stellar bodies.  These planets are so large that their gravitational pull has great effect on objects flying thousands of miles away.

As you may know, there is an asteroid belt between the orbits of planets Mars and Jupiter.  This asteroid belt is believed to be the remains of a planet that did not form due to the gravitational pull of Jupiter.

This asteroid belt contains rocks of all shapes and sizes that contain nickel and iron elements.
These objects sometimes fly off and can become a threat to planet Earth.  However, Jupiter and the other outer planets prevent this by "slinging" asteroids away from Earth.  Objects from the asteroid belt are not the only danger to Earth.  The entire universe is full of meteoroids, asteroids, comets and other things that originate in interstellar space, or the space outside of the Solar System.  The outer planets with their massive gravitational pulls also deflect these foreign objects away from Earth and the rest of the Solar System.  

THE OZONE LAYER
This layer is probably one that we hear the most about on the news, in school and possibly now after the world has been facing extreme weather.  The Ozone Layer is extremely important to Earth.  Without it, life will not be possible.  It is an invisible layer of ozone with only three to four molecules present for every 10-12 million molecules of oxygen or air.

Most of the ozone exists between six to ten miles above surface level with 35 miles extending into the stratosphere.  This layer is responsible for absorbing UV-B or ultraviolet rays from the Sun which are extremely harmful to biological life.  It only allows the right amount in order to regulate weather and allow for life to exist and grow.  The Earth is the only planet to possess this layer.      

THE MAGNETOSPHERE
The Earth also has its own shield that protects it from the harmful energies of space.  Like the
starship Enterprise in the franchise Star Trek, the Earth generates a magnetic field that deflects radiation from our Sun and from space itself. This is called "Geodynamo."

This shield is generated by the Earth's core. The core is made of iron and is spinning deep in the Earth.  Gravity keeps the iron compressed into a solid state despite the high temperatures. However, the outer core is liquid and moves as the Earth rotates.  This motion of hot molten iron and other metals generates an electrical current which travels out into space generating a field around the planet. This field offers protection from cosmic radiation and solar flares.  Without this force field of sorts, life would not be possible on Earth.  


THE HELIOSPHERE
If the protection of Jupiter/outer planets, the ozone layer and magnetosphere on Earth were not enough, there is another line of defense called the Heliosphere.

The Heliosphere is a gigantic magnetic energy field or bubble that contains the Solar System. This field is generated by the Sun and serves to protect the Solar System from interstellar cosmic radiation that would be extremely harmful to the planets, in particular Earth which has life.

CONCLUSION
These are just some instances showing how there is an intent in the structure of our Solar System geared towards the protection of life.  One may say, "it just formed this way, there is nothing supernatural about this."  While this may be true, it still does not account for the intention for the preservation of life.  The structures I have described here all serve one common theme: preservation of life.
  • If the universe was created by mere chance from an unconscious flow of energy and interaction of matter, how did it know when, where and how to protect life?  
  • How did this unconscious agent of energy and interaction of matter know where life existed and that it needed to be protected?  
  • How did it know how to protect this life?    

Trial and error here cannot apply because the universe was created from one "Big Bang."  This "Big Bang" formed all there is today in a specific order using the "instructions" in the laws of physics without the use of trial and error.  It did not have time to have "test runs" until it found the right processes that served to adequately form and protect life.

It is logical to conclude that there is an intelligent direction in the formation of these natural defenses and life in general.  Only an intelligence can be aware of the existence of life in a particular region and that it needs protection.  Moreover, only an intelligent agent can be aware of how to protect this life by installing the right processes and procedures in order to allow for the preservation of the former.  Lastly, an intelligent agent that knows how to design a system to protect life does so because this agent created the life and knows how to preserve it.  Only the inventor of a product knows how it is supposed to work, where it is supposed to work and how to extend its shelf life.

Life is indeed special and the universe has shown this with how it protects it and allows it to evolve.
Atheism is stupid for the allowance of the suggestion that an unintelligent unconscious agent created the universe while designing safety measures in order to allow for the preservation of life in a hostile environment.  It is stupid for assuming that life is not special in the universe and that it is just a produce of "good luck."  The logical conclusion is that an intelligent conscious agent knew what to create, how to create it and how it should protect life.            

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