Pale Blue Dot photo turns 20

I didn’t catch it earlier, but Feb. 13 2010 marked the 20th anniversary of the now-famous Pale Blue Dot photograph taken from the Voyager 1 some 3.7 billion miles away from Earth. The faint blue speck to the right and inset, that’s our planet.

Credit: From Voyager 1

I found this site today, which references the anniversary and an extraordinary and humbling quote from former author and astronomer Carl Sagan (1934-1996):

Look again at that dot. That’s here. That’s home. That’s us. On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives. The aggregate of our joy and suffering, thousands of confident religions, ideologies, and economic doctrines, every hunter and forager, every hero and coward, every creator and destroyer of civilization, every king and peasant, every young couple in love, every mother and father, hopeful child, inventor and explorer, every teacher of morals, every corrupt politician, every ‘superstar,’ every ‘supreme leader,’ every saint and sinner in the history of our species lived there — on a mote of dust suspended in a sunbeam.

The Earth is a very small stage in a vast cosmic arena. Think of the rivers of blood spilled by all those generals and emperors so that, in glory and triumph, they could become the momentary masters of a fraction of a dot. Think of the endless cruelties visited by the inhabitants of one corner of this pixel on the scarcely distinguishable inhabitants of some other corner, how frequent their misunderstandings, how eager they are to kill one another, how fervent their hatreds.

Our posturings, our imagined self-importance, the delusion that we have some privileged position in the Universe, are challenged by this point of pale light. Our planet is a lonely speck in the great enveloping cosmic dark. In our obscurity, in all this vastness, there is no hint that help will come from elsewhere to save us from ourselves.

The Earth is the only world known so far to harbor life. There is nowhere else, at least in the near future, to which our species could migrate. Visit, yes. Settle, not yet. Like it or not, for the moment the Earth is where we make our stand.

It has been said that astronomy is a humbling and character-building experience. There is perhaps no better demonstration of the folly of human conceits than this distant image of our tiny world. To me, it underscores our responsibility to deal more kindly with one another, and to preserve and cherish the pale blue dot, the only home we’ve ever known.

[Original caption: This narrow-angle color image of the Earth, dubbed ‘Pale Blue Dot’, is a part of the first ever ‘portrait’ of the solar system taken byVoyager 1. The spacecraft acquired a total of 60 frames for a mosaic of the solar system from a distance of more than 4 billion miles from Earth and about 32 degrees above the ecliptic. From Voyager’s great distance Earth is a mere point of light, less than the size of a picture element even in the narrow-angle camera. Earth was a crescent only 0.12 pixel in size. Coincidentally, Earth lies right in the center of one of the scattered light rays resulting from taking the image so close to the sun. This blown-up image of the Earth was taken through three color filters – violet, blue and green – and recombined to produce the color image. The background features in the image are artifacts resulting from the magnification.]

Our not-so-unique planet

I was just watching an episode of “The Universe,” a History Channel series in which the narrator asked:

How common might Earth-like planets be in the universe? Even if only 1 percent of all stars were circled by a planet like our own, that would still mean there are billions of other earths waiting to be discovered.

And according to this article and Alan Boss, an astronomer with the Carnegie Institution and author of the book “The Crowded Universe: The Search for Living Planets,” he indicated:

There may be 100 billion Earth-like planets in the Milky Way, or one for every sun-type star in the galaxy.

And to quote the article:

Boss said that if any of the billions of Earth-like worlds he believes exist in the Milky Way have liquid water, they are likely to be home to some type of life.

“Now that’s not saying that they’re all going to be crawling with intelligent human beings or even dinosaurs,” he said.

“But I would suspect that the great majority of them at least will have some sort of primitive life, like bacteria or some of the multicellular creatures that populated our Earth for the first 3 billion years of its existence.”

So, notwithstanding basic organisms, what about intelligent life?

Other scientists are taking another approach: an analysis that suggests there could be hundreds, even thousands, of intelligent civilizations in the Milky Way.

Researchers at the University of Edinburgh in Scotland constructed a computer model to create a synthetic galaxy with billions of stars and planets. They then studied how life evolved under various conditions in this virtual world, using a supercomputer to crunch the results.

In a paper published recently in the International Journal of Astrobiology, the researchers concluded that based on what they saw, at least 361 intelligent civilizations have emerged in the Milky Way since its creation, and as many as 38,000 may have formed.

That’s just in our own galaxy. The picture to the right shows 10,000 more.

As I’ve said before, the discovery of life elsewhere in the universe would seemingly create huge problems for young Earth (Actually, astronomy and astrophysics has already disproved young Earth theories) creationist theories about how life began here and, indeed, about existence in general, since the book of Genesis seems to indicate that there is only one planet on which life exists and its at the center of, well, everything that’s relevant.

The following blogger and other apologists suggest that the discovery of life on other planets would not shoot holes in the creation theory.

The discovery of alien life would not disprove Christianity anymore than it would prove evolution. In his book Darwin’s Black Box, Bio-Chemist Michael Behe astutely pointed out that understanding how something works or exists now does not prove we know how that came to be the way it is. Applying that to this discussion, it is reasonable to say that even if evolutionary scientists announce the presence of alien life in a far corner of the cosmos, this does not prove that evolution was the means by which it got there. God could just as well have supernaturally created that life apart from earth according to his divine will. So Christians need not fear any negative implications regarding how their Creationist position might be affected by the discovery of alien life. They must simply be ready to say that God can choose to create life where he chooses. — astuteness.wordpress.com

I should note that this writer cites Michael Behe, whose own theories on irreducible complexity have long since been debunked by Richard Dawkins and others and even by his own university.

This apologist site attempts to clarify matters for us, suggesting that any extraterrestrial life that exists cannot be intelligent because the only intelligent beings God created were animals, man and angels (Of course, since the word “animals” includes both multi-and single-celled organisms, they may or may not be “intelligent.”) But looking outside of pages written in Bronze-age Palestine, what are the chances that no intelligent life exists anywhere in the universe? Given the number of possible galaxies (not to mention the number of possible Earths inside those galaxies), the chances would be infinitesimally small. And this question only assumes that intelligent life needs Earth-like conditions to exist. In fact, no rule says that intelligent life absolutely needs human conditions (oxygen, ideal climates) to exist. Who’s to say that a civilization can’t exist given a totally different set of parameters? So, take “infinitesimal” and multiply it by two, and that’s more like the actual chance that intelligent life doesn’t exist somewhere else.

As per its biblical charter, the same site says that the future of the universe is “forever linked to God’s timetable for mankind and the Earth.” And what bearing does this plan have on any potential life elsewhere?

If God had created intelligent life on other worlds, it is hard to imagine that their lives would be calibrated by the failures of Earth’s inhabitants. It seems unlikely and unfair that their distant planets would be destroyed by God because of His plan for Earth [If so, I guess that would make them doomed to eternal fire by proxy]. The implication of Scripture is that there are no other intelligent beings besides man, animals, and the angels.

It’s also hard to imagine that adults in Africa, who may have never heard about Jesus, will go to hell simply because of their ignorance of scripture, so we don’t have to look beyond our atmosphere for instances of unfairness. But these types of arguments are really the only way apologists can right the ship: to subvert what we know about the universe and to claim that any theory (evolution, the big bang, gravity!, etc.) doesn’t square with scripture and should, thus, be discarded. And when things don’t make any sense at all (For instance, the problem of extreme suffering and/or the fall of man under the auspices of an omnibenevolent, omnipotent god who knew about the whole tragic scenario before he set it in motion)? Just tout our lowly ignorance versus God’s omniscience.

Most Earthlike planet found

Gliese 581d, originally discovered in 2007, has recently been found to, perhaps, have an environment that could support life. It is the most Earthlike planet yet to be discovered and is an exoplanet. National Geographic writes,

First discovered in 2007, Gliese 581d was originally calculated to be too far away from its host star—and therefore too cold—to support an ocean.

But (astronomer Michel Mayor, from Geneva University in Switzerland) … and colleagues now show that the extrasolar planet, or exoplanet, orbits its host in 66.8 days, putting it just inside the cool star’s habitable zone.

Also, according to Nat Geo,

Weighing in at around seven Earth masses, Gliese 581d is unlikely to be made of rocks alone, the team believes.

“We can only speculate at this stage, but it may have a rocky core, encased in an icy layer, with a liquid ocean at the surface and an atmosphere,” Mayor said.

This goes along with water ice discovered in 2008 on Mars. Obviously, water is the key to life. Where water is, life is not far behind. But I have this question. If we verify 100 percent in the next decade or so, as some predict, that, through these discoveries or others, that life does exist on Mars or some exoplanet in the form of a single celled organism or some other simple organism, how will that implicate religion as we know it? True, the big three, Judaism, Christianity and Islam attribute a creator god. But specifically with Christianity, how will such a finding affect things, if at all? Genesis assembles life on Earth (and only Earth) through God in a matter of three chapters with no mention of  the possibility of life anywhere other than Earth, which is convenient, since ancients believed the earth was the center of the solar system, not the sun. In fact, Earth exists on a spiral arm, so we are at the center of nothing, contrary to what the ancients and the biblical writers believed. We just are. And the discovery of life, or past life, on some other planet, would, it seems to me, shoot holes in creationist theories, perhaps beyond repair.