Tag Archives: Faith

Commentary

What are galactic habitable zones and circumstellar habitable zones?

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The Circumstellar Habitable Zone (CHZ)

What do you need in order to have a planet that supports complex life? First, you need liquid water at the surface of the planet. But there is only a narrow range of temperatures that can support liquid water. It turns out that the size of the star that your planet orbits around has a lot to do with whether you get liquid water or not. A heavy, metal-rich star allows you to have a habitable planet far enough from the star so  the planet can support liquid water on the planet’s surface while still being able to spin on its axis. The zone where a planet can have liquid water at the surface is called the circumstellar habitable zone (CHZ). A metal-rich star like our Sun is very massive, which moves the habitable zone out further away from the star. If our star were smaller, we would have to orbit much closer to the star in order to have liquid water at the surface. Unfortunately, if you go too close to the star, then your planet becomes tidally locked, like the moon is tidally locked to Earth. Tidally locked planets are inhospitable to life.

Circumstellar Habitable Zone
Circumstellar Habitable Zone

Here, watch a clip from The Privileged Planet: (Clip 4 of 12, full playlist here)

But there’s more.

The Galactic Habitable Zone (GHZ)

So, where do you get the heavy elements you need for your heavy metal-rich star?

You have to get the heavy elements for your star from supernova explosions – explosions that occur when certain types of stars die. That’s where heavy elements come from. But you can’t be TOO CLOSE to the dying stars, because you will get hit by nasty radiation and explosions. So to get the heavy elements from the dying stars, your solar system needs to be in the galactic habitable zone (GHZ) – the zone where you can pickup the heavy elements you need but not get hit by radiation and explosions. The GHZ lies between the spiral arms of a spiral galaxy. Not only do you have to be in between the arms of the spiral galaxy, but you also cannot be too close to the center of the galaxy. The center of the galaxy is too dense and you will get hit with massive radiation that will break down your life chemistry. But you also can’t be too far from the center, because you won’t get enough heavy elements because there are fewer dying stars the further out you go. You need to be in between the spiral arms, a medium distance from the center of the galaxy.

Like this:

Galactic Habitable Zone
Galactic Habitable Zone and Solar Habitable Zone

Here, watch a clip from The Privileged Planet: (Clip 10 of 12, full playlist here)

The GHZ is based on a discovery made by astronomer Guillermo Gonzalez, which made the front cover of Scientific American in 2001. That’s right, the cover of Scientific American. I actually stole the image above of the GHZ and CHZ (aka solar habitable zone) from his Scientific American article (linked above).

These are just a few of the things you need in order to get a planet that supports life.

Here are a few of the more well-known ones:

  • a solar system with a single massive Sun than can serve as a long-lived, stable source of energy
  • a terrestrial planet (non-gaseous)
  • the planet must be the right distance from the sun in order to preserve liquid water at the surface – if it’s too close, the water is burnt off in a runaway greenhouse effect, if it’s too far, the water is permanently frozen in a runaway glaciation
  • the solar system must be placed at the right place in the galaxy – not too near dangerous radiation, but close enough to other stars to be able to absorb heavy elements after neighboring stars die
  • a moon of sufficient mass to stabilize the tilt of the planet’s rotation
  • plate tectonics
  • an oxygen-rich atmosphere
  • a sweeper planet to deflect comets, etc.
  • planetary neighbors must have non-eccentric orbits

By the way, you can watch a lecture with Guillermo Gonzalez explaining his ideas further. This lecture was delivered at UC Davis in 2007. That link has a link to the playlist of the lecture, a bio of the speaker, and a summary of all the topics he discussed in the lecture. An excellent place to learn the requirements for a suitable habitat for life.

Commentary

Why do atheists like Dan Barker abandon their faith?

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Unbelievable’s latest radio show featured a discussion with former Christian Dan Barker, the founder and co-President of the Freedom From Religion Foundation.

The MP3 file is here. (60 minutes)

I thought that I would make some general comments about why I think that many people leave the Christian faith, and what you should be careful of in order to avoid following in Dan Barker’s footsteps, specifically.

Basically, there are four major reasons why people leave Christianity.

  1. They want to do something immoral with impunity. This type of person wants to do something immoral that is forbidden by Christianity, like pre-marital sex. They dump Christianity in order to feel better about seeking happiness in this life, apart from God and his moral duties.
  2. They want to pursue happiness in irresponsible ways. This type of person thinks that God’s job is to save them when they act irresponsibly while pursuing happiness. When God disappoints them by not giving them what they want in order to be happy, they leave the faith.
  3. They want to be loved by people, not by God. This type of person thinks that Christianity is a tool that they can use to become popular. When they first try to articulate the gospel in public, they find that people don’t like them as much, and they feel bad about offending people with exclusive truth claims that they cannot back up using logic and evidence. So, they water down Christianity to get along with atheists, liberal Christians and other religions. Finally, they jettison Christianity completely and focus on making everyone feel good about whatever they believe.
  4. They don’t want to learn to defend their faith. This type of person is asked questions by skeptics that they cannot answer. Usually this happens when people go to university after growing up in the shelter of the Church. The questions and peer pressure make them feel stupid. Rather than investigate Christianity to see if it’s true and to prepare to defend it in public, they dump it so they can be thought of as part of the “smart” crowd.

Now listen to the discussion and see if you can identify some of these factors from Barker’s own carefully-prepared words. He is trying very hard to make himself look honest and moderate, because he wants Christians to be sympathetic with his story and his motives for leaving Christianity. But I think that there is enough in his statements to construct a different hypothesis of why he left Christianity.

I’ve grouped the data by risk factor. (These are not his exact views)

Non-rational, emotional approach to Christianity

  • he was raised in a devout Christian family where he probably wouldn’t have faced skeptical questions
  • he converted to Christianity at age 15 as a result of a religious experience, not a serious investigation
  • his idea of God was probably idealized and uninformed, e.g. – a loving God who wants us to be happy
  • he wandered around from church to church preaching, with no fixed address or source of income
  • he earned money by collecting “love offerings” from churches where he performed his music
  • he wrote Christian songs and Christian musicals, but nothing substantive on apologetics and theology
  • he worked in three churches known for being anti-intellectual and fundamentalist
  • there’s no evidence that of any deep study of philosophy, science and history during this time

Desire to gain acceptance from non-Christians

  • he began to notice that some people were uncomfortable with sin and Hell
  • he began to avoid preaching about sin and Hell in order to make these people comfortable
  • he watered-down the gospel to focus on helping people to be happy in this life
  • his manic approach to Christian ministry was challenged by the “real life” needs of his growing family
  • he met liberal pastors while performing his music in their churches
  • he found it difficult to disagree with them because they seemed to be “good” people
  • he watered down his message further in order to appeal to people across the theological spectrum

Ignorance of Christian apologetics

  • he began to think that if there are many different views of religion, then no view can be correct
  • he was not intellectually capable of using logic and evidence to test these competing claims to see which was true
  • he decided to instead re-interpret Christian truth claims as non-rational opinions, so they could all be “valid”
  • he became a theological liberal, abandoning theism for an impersonal “ground of being”
  • he embraced religious pluralism, the view that all religions are non-rational and make no testable truth claims
  • he began to see God as a “metaphor” whose purpose is to make people have a sense of meaning and purpose
  • he jettisoned God completely and focused more on helping people find meaning and morality apart from God
  • seems to think that religion is about having a “great life”, and felt that you can have a “great life” without religion
  • seems to think that religion is about being “good”, and felt that you can be “good” without religion
  • religion makes people feel bad by telling them what to do instead of letting them do anything they want
  • religion makes people feel bad by telling them what is true, instead of letting them believe whatever they want
  • religion makes people feel bad by telling them that God will hold them accountable for their beliefs and actions

So what do I think happened?

I think he abandoned his faith because he wanted people to like him and because he needed to be invited to liberal churches in order to make money to pay for the “real life” needs of his family.

He seems to have thought that Christianity is about having his needs met and being liked by others. I think he wanted to feel good and to make people feel good with his preaching and singing. He seems to have become aware that the exclusive claims of Christianity made other people feel offended, so he cut them out. He hadn’t studied philosophy, science or history so that he would have been able to demonstrate to other people whether what he was saying was true. It’s hard to offend people when you don’t really know whether your claims are true or not, and when you don’t know how to demonstrate whether they are true or not.

I also think money was a factor. It seems to me that it would have hurt his career and reduced his invitations from liberal churches if he had kept up teaching biblical Christianity. In order to appeal to a wider audience, (like many Christian singers do – e.g. – Amy Grant, Jars of Clay, etc.), he would have felt pressured to water down the unpleasant parts of his preaching and singing. Lacking apologetics skill, he instead abandoned his message. He needed to account for his family’s needs and “real life”, and exclusive truth claims and Hell-talk would probably have reduced his ability to do that. It seems to me that he should have scaled back his extreme schedule of preaching and singing, and instead gotten a steady job so that he could afford “real life” and a family without being pressured into altering his message.

Life isn’t a fairy tale. God isn’t there to reward risky behavior. We need to be more shrewd about financial matters so that we have the ability to not care about what people think of us. Look at this blog. I work all day as a senior software engineer with two degrees in computer science so that I can refuse donations. I save most of what I make in case a tragedy strikes. Since I am financially secure, I can say what I think, and disregard anyone who wants me to change my message because they are offended. Becoming a Christian isn’t a license to behave irrationally and immaturely with money. For some people, (like William Lane Craig), stepping out in faith works. But if it doesn’t work, it’s better to retreat and re-trench, rather than to compromise your message for money.

Barker didn’t seem to make any effort to deal intellectually with typical challenges like the existence of Hell and religious pluralism. He just wanted to be liked by people instead of being liked by God. He seemed to have thought that being a Christian would make him happy and that other people would all respond to him and like him without having to do any work to explain why Christianity is true. But that’s not Biblical. When the singing and preaching is over, you still have to know how to give an answer to non-Christians. But Barker couldn’t give an answer – not one that allowed him to retain his beliefs. He had not prepared a defense.

What does Dan Barker think about Christianity today?

Many atheists today are interested in eradicating public expressions of Christian beliefs in the public square, because they hate Christianity and believe that Christians should not be allowed to make them feel bad by exercising their rights of free speech. Is Dan Barker one of these militant atheists?

Well, take a look at this video, in which he objects to a nativity scene and demands that an atheistic denunciation of theism be posted alongside it. In the video, Barker explains that the nativity scene is hate speech, and that the baby Jesus is a dictator. He seems to be totally oblivious to the the idea that if Christianity is true, then it doesn’t matter whether it’s mean and exclusive. And this seems to me to have been his problem all along, from the day of his “conversion”.

So the real question is this: is it true? Barker seems to be much more interested in asking “is it nice?” and “will it make me happy?”.

News

Scientist quits American Physical Society over “global warming scam”

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A prominent scientist has resigned from the American Physical Society and written a letter that exposes how scientific organizations suppress dissent and honest inquiry.

The author is Harold Lewis, Emeritus Professor of Physics at the University of California, Santa Barbara.

This was posted on Watts Up With That. (H/T ECM)

Excerpt:

When I first joined the American Physical Society sixty-seven years ago it was much smaller, much gentler, and as yet uncorrupted by the money flood (a threat against which Dwight Eisenhower warned a half-century ago).

Indeed, the choice of physics as a profession was then a guarantor of a life of poverty and abstinence—it was World War II that changed all that. The prospect of worldly gain drove few physicists. As recently as thirty-five years ago, when I chaired the first APS study of a contentious social/scientific issue, The Reactor Safety Study, though there were zealots aplenty on the outside there was no hint of inordinate pressure on us as physicists. We were therefore able to produce what I believe was and is an honest appraisal of the situation at that time. We were further enabled by the presence of an oversight committee consisting of Pief Panofsky, Vicki Weisskopf, and Hans Bethe, all towering physicists beyond reproach. I was proud of what we did in a charged atmosphere. In the end the oversight committee, in its report to the APS President, noted the complete independence in which we did the job, and predicted that the report would be attacked from both sides. What greater tribute could there be?

How different it is now. The giants no longer walk the earth, and the money flood has become the raison d’être of much physics research, the vital sustenance of much more, and it provides the support for untold numbers of professional jobs. For reasons that will soon become clear my former pride at being an APS Fellow all these years has been turned into shame, and I am forced, with no pleasure at all, to offer you my resignation from the Society.

It is of course, the global warming scam, with the (literally) trillions of dollars driving it, that has corrupted so many scientists, and has carried APS before it like a rogue wave. It is the greatest and most successful pseudoscientific fraud I have seen in my long life as a physicist. Anyone who has the faintest doubt that this is so should force himself to read the ClimateGate documents, which lay it bare. (Montford’s book organizes the facts very well.) I don’t believe that any real physicist, nay scientist, can read that stuff without revulsion. I would almost make that revulsion a definition of the word scientist.

So what has the APS, as an organization, done in the face of this challenge? It has accepted the corruption as the norm, and gone along with it.

If you read the rest of the letter, you will find that the the author lists specific cases where dissent was squashed by the global warming alarmists. He suspects that the reason was money – scientists have to “discover” what the government wants them to discover, in order to create a crisis that requires… more government control.

The letter was posted at the UK Telegraph and has over 800 comments!