Tag: Milky Way

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Alone In the Milky Way

Alone In the Milky Way
Yesterday we mentioned an article by John Gribbin in Scientific American (September 2018, page 96 or online HERE.) The title of the article was “Are Humans Alone in the Milky Way?” Although Gribbin suggests that some form of life exists elsewhere in the galaxy, he insists there could be no sentient beings like ourselves. The reasons for concluding that we are alone in the Milky Way galaxy are these “amazing” and “implausible” “coincidences.”

SPECIAL TIMING. The elements that make up a terrestrial planet like Earth are produced from hydrogen and helium by thermonuclear fusion. We see supernova explosions producing the heavy metals that make up a terrestrial planet and life itself, but it takes time for this process to create the necessary elements. Most of the exoplanets we see have minimal amounts of the heavy elements because they are early in their stellar evolution. Even the sun itself is 71% hydrogen and 27% helium with only 2% metals. The timing of putting the materials together to make a terrestrial planet is critical.

LOCATION IN THE GALAXY. The location of a solar system in the galaxy makes a difference. The galactic habitable zone is the area where there is a freedom from the concentration of supernovae. Systems near the center of the galaxy have high levels of radiation in the form of X-rays and cosmic rays. There is a massive black hole in the center of our galaxy called Sagittarius A which produces massive amounts of radiation. Gamma-ray bursts occur in certain places in the galaxy. In our area of the galaxy, sterilizing radiation bursts do not happen.

Recent studies of the galactic habitable zone tell us that it extends from 23,000 to 30,000 light-years from the center or only about 7% of the galactic radius. This zone contains only about 5% of the stars, because stars tend to concentrate toward the core of the galaxy. Our Sun is close to the center of the galactic habitable zone providing rare long-term stability.

TYPE OF PLANET. So far astronomers have discovered about 50 “earth-like planets.” What that means is that they have found rocky planets in the habitable zone that are about the same size as Earth. Venus would qualify as an “Earth-like planet,” but it is an excellent example of how misleading that statement is. Venus has a thick crust with no sign of plate tectonics, no magnetic field, no way to recycle materials, and no stabilizing moon. Our Moon keeps the tilt of Earth’s axis at 23 ½ degrees providing a stable climate.

Realize that all of these factors are just to have a ball of rock in the right place at the right time with the right materials with which to make life. Now we would need to calculate the odds of getting the right chemicals together at the right time in the right place with the right catalyst to make the first living thing. Books have been written about how improbable those steps are. The writers are not religious fanatics, but scientists who are doing the research.

The Scientific American article, concludes that we are alone in the Milky Way:

“As we put everything together, what can we say? Is life likely to exist elsewhere in the galaxy? Almost certainly yes, given the speed with which it appeared on Earth. Is another technological civilization likely to exist today? Almost certainly no, given the chain of circumstances that led to our existence. These considerations suggest we are unique not just on our planet but in the whole Milky Way. And if our planet is so special, it becomes all the more important to preserve this unique world for ourselves, our descendants and the many creatures that call Earth home.”

We must make one additional point. If an intelligent Creator was involved in this process, the probability of a habitable Earth with life on it is 100%. Perhaps we are not really alone in the Milky Way because there is a God who cares about us. For those who might want to consider this option, we encourage you to watch program #6 of the video series available free on doesgodexist.tv.
–John N. Clayton © 2018

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Implausible Coincidences

Implausible Coincidences in the Milky Way
Our ministry has been in existence for 50 years this month. During that time we have presented a large number of evidences that the creation of Earth and life on Earth cannot be a product of chance. Our arguments have been statistical, starting with the basic rule that when you have many parameters, you can estimate the total probability by multiplying the odds of all the factors involved. That approach has not changed, but the number of parameters and the odds grows with new data and information. Implausible coincidences continue to compound.

In the past several years, astronomers have found thousands of planets orbiting other stars in the Milky Way. Skeptics point out that the probability of one of those planets harboring sentient beings like ourselves gets better with each new discovery. Scientific American (September 2018, page 96) published a good review of some of the factors that are involved. The article plainly states this:

“Optimism about the possibilities of intelligent extraterrestrial life ignores what we know about how humans came to exist. We are here because of a long chain of implausible coincidences – many, many, many things had to go right to result on the situation in which we find ourselves. This chain is so implausible, in fact, that there is good reason to conclude that humans most likely are the only technological civilization in the galaxy.”

That is an interesting conclusion. The article goes on to list the variables that point to that conclusion:

SPECIAL TIMING
LOCATION IN THE GALAXY
TYPE OF PLANET

Tomorrow, we will examine those “coincidences.” The article concludes by describing the improbable nature of advanced human life. However, it credits evolution for the creation of that life while showing how “implausible” and “amazing” it is. We believe a supernatural Intelligence was involved which we call God.
–John N. Clayton © 2018
The Scientific American article is available online HERE.

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Life Needs Phosphorus

Life Needs Phosphorus
The element phosphorus is used to make matches. Molecular phosphorus has two common forms. There is white phosphorus which is dangerously combustible and is used to make fireworks and weapons. The more stable red phosphorus is used on the side of any box of safety matches. When you strike the match against the red phosphorus, a small amount of it is changed to white phosphorus to ignite the match. But phosphorus has more important uses than starting fires. Life needs phosphorus. The average human body contains about 26.5 ounces (750 grams) of phosphorus. Most of it is in our bones.

Phosphate is a compound of phosphorus and oxygen. It combines with sugars in living tissue to form the backbone of DNA, which is the blueprint for life found in every living cell. Phosphate is also part of a complex organic chemical called adenosine triphosphate (ATP) found in every living organism. ATP releases energy so that cells can function. Life needs phosphorus and could not exist without it in an abundant supply.

Recent research presented at the European Week of Astronomy and Space Science on April 5, 2018, indicates that phosphorus may not be widely available in the Milky Way. The research indicates that it is more random than scientists had previously thought. That means even if one of the recently discovered exoplanets had all of the conditions required to support life, it still might be lifeless without phosphorus.

We have often referred to the many conditions required to make a habitable planet. Here is one more to add to the list. Life needs phosphorus, and apparently phosphorus is less widely distributed than we thought. Phil Cigan, one of the astronomers involved in the study, said, “It’s not a guaranteed thing to have phosphorus abundant everywhere, ripe for the picking. It seems to look like luck plays a bigger role in this.”

Is it just one more chance coincidence that planet Earth has the phosphorus needed for life? We don’t think it is a matter of luck. We think this is another evidence of God’s design for life.
–Roland Earnst © 2018

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A Quiet Neighborhood is a Good Neighborhood

Beyond the Quiet Neighborhood
At a June 7 meeting of the American Astronomical Society, Benjamin Hoscheit presented information gained from studying 120,000 galaxies. The study agreed with earlier findings that our Milky Way galaxy is located in the largest cosmic void that we can observe. When scientists look one billion light-years out into the universe, they find that the cosmic density becomes much greater. The conclusion they have reached is that the Milky Way is in a relatively open area of space about two billion light-years across. We live in a quiet neighborhood.

The computer image from the Millennium Simulation Project illustrates the dense filaments of dark matter stretching through space. Galaxies are mostly clumped along the filaments. The Milky Way resides in one of the voids between those strands. What are the implications of that? Galaxies tend to be in clusters, and our cluster is called the Local Group. A typical galaxy cluster will have 10,000 galaxies close together. (Close by cosmic standards.) The Local Group has only forty galaxies, and all of them are dwarf galaxies except the Milky Way and Andromeda which are medium-sized. If there were large galaxies close to us, their gravity could distort the spiral structure of the Milky Way making advanced life on Earth impossible.

The Milky Way is a spiral galaxy—the only kind of galaxy capable of supporting advanced life. Star formation drives the spiral motion. Star formation requires the infusion of gas and dust which the small galaxies provide. Clusters of galaxies reside inside superclusters. Our Local Group cluster is on the outer fringe of the Virgo supercluster. If it were near the center of Virgo, the massive clusters there would absorb the Local Group and make life impossible.

Also, our solar system is located in the best position within our galaxy at about two-thirds of the distance from the center. In the center of the Milky Way (and most galaxies), there is a massive black hole that would swallow our solar system if we were anywhere near it. If we were farther out in the spiral, the solar system would be subject to massive instability, again making life impossible.

Of course, Earth is also located in the solar habitable zone where we are not too close or too far from the Sun. One final thing to note is that in this cosmic void and the position in our galaxy, we are at the optimum location for observing all of the things I mentioned. We have an excellent view of the universe. We are in more than a quiet neighborhood. We are in the “Goldilocks Zone” where everything is “just right.”

You could say that we got lucky and all of these things, and many others, are merely freak accidents. We believe that God had a reason for putting us where we are, and has given us a purpose for being here.
–Roland Earnst © 2017