Tag Archives: Cosmology

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Video review of the 2011 William Lane Craig vs Peter Atkins debate

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From someone who attended the debate, a review:

So, just who is this Peter Atkins, and why is he a good spokesman for atheism?

From his Wikipedia bio.

Peter William Atkins (born August 10, 1940) is an English chemist and a fellow and professor of chemistry at Lincoln College of the University of Oxford. He is a prolific writer of popular chemistry textbooks, including Physical Chemistry, 8th ed. (with Julio de Paula of Haverford College), Inorganic Chemistry, and Molecular Quantum Mechanics, 4th ed. Atkins is also the author of a number of science books for the general public, including Atkins’ Molecules and Galileo’s Finger: The Ten Great Ideas of Science.

[…]He was the first Senior Member for the Oxford Secular Society and an Honorary Associate of the National Secular Society. He is also a member of the Advisory Board of The Reason Project, a US-based charitable foundation devoted to spreading scientific knowledge and secular values in society. The organisation is led by fellow atheist and author Sam Harris.

While we wait for Brian Auten or Justin Brierley to post the audio of the second debate, why not watch the first Craig/Atkins debate?

The first Craig vs. Atkins debate

Here’s a clip from the first debate:

You can watch the whole debate here, posted by ChristianJR4. Moderated by William F. Buckley! If you watched the audience closely, you’ll see Michael Behe, Ravi Zacharias and Henry F. Schaefer III. All-star crowd!

Polemics

What conditions support the minimum requirements for complex life?

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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.

News

Nobel prize award for accelerating universe is relevant to Christian apologetics

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First, the story – and then we’ll see how the accelerating universe relates to the existence of God.

Excerpt:

Three astrophysicists who discovered that the universe’s expansion is accelerating rather than decelerating, as had been expected, win the Nobel Prize in physics.

Adam Riess was sure he’d spotted a blatant error in his results. It was 1997, and the young post-doc’s measurements of distant, exploding stars implied that the universe was expanding at a faster and faster rate, instead of slowing down, as he had expected.

It wasn’t an error at all. Instead, what was at fault were some basic assumptions about the workings of the universe.

On Tuesday, the Johns Hopkins University astrophysicist received the Nobel Prize in physics for the revolutionary discovery and its implications, along with team leader Brian Schmidt of Australian National University and astrophysicist Saul Perlmutter of UC Berkeley and Lawrence Berkeley National Laboratory, who had reached the same conclusion independently.

At the time of their work, astrophysicists believed that the rate of expansion of the universe — set in motion by the Big Bang 13.7 billion years ago — would be slowing down as matter was pulled together by gravity. The goal at the time was to figure out how rapid the deceleration was.

What the two teams found instead was that the expansion of the universe was accelerating — an observation that could best be explained by the existence of a mysterious “dark energy” that pushes matter farther and farther apart.

Many scientists had thought that, just as the universe started with the Big Bang, it would end with a Big Crunch — with gravity pulling all the matter in the universe inward.

Does anyone remember that week that I wrote those posts about “Why I am not a… <insert some religion here>”? I explained why I was not all kinds of different religions and denominations, including Roman Catholicism, Calvinism, Hinduism, Judaism, Islam, etc. Everyone was offended and we fought about it. Ah, I remember it well.

Well, recall the evidence I used to defeat Hinduism.

Excerpt:

Why I am not a Hindu

  1. Hindu cosmology teaches that the universe cycles between creation and destruction, through infinite time.
  2. The closest cosmological model conforming to Hindu Scriptures is the eternally “oscillating” model of the universe.
  3. The “oscillating” model requires that the universe exist eternally into the past.
  4. But the evidence today shows the the universe, and time itself, had a beginning at the big bang.
  5. The “oscillating” model requires that the expansion of the universe reverse into a collapse, (= crunch).
  6. In 1998, the discovery of the year was that the universe would expand forever. There will be no crunch.
  7. Therefore, the oscillating model is disconfirmed by observations.
  8. The oscillating model also faces theoretical problems with the “bounce” mechanism.

So that’s one reason why I am not a Hindu.

(The absolute origin of the universe out of nothing is also incompatible with Buddhism, Mormonism, etc. because they also require an eternally existing universe)

Notice anything? That’s right! I used this discovery, which was named the discovery of the year at the time, to argue that the universe would expand forever, thus contradicting the Hindu cosmology, which oscillates in cycles of existence and non-existence.

I think it’s important that you guys realize that when it comes to Christianity, we need to not mess around with church, Bible-y stuff. Bring the Nobel-prize-winning data and win the debate decisively. Leave no doubt. Do not use Christianese. Do not sing praise hymns. Do not cite Bible verses. You want to use the Nobel-prize-winning science. You want what works.

You can find some more refutations of other world religions here.

And it works on atheism

I think it’s important for all of you to be familiar with the scientific evidence for the Big Bang. It will help you with your cosmological argument, and it will help you to refute many, many other religions that require eternal universes, including atheism.

I wrote about how the Big Bang theory falsifies atheism before.

Excerpt:

According to the Secular Humanist Manifesto, atheism is committed to an eternally existing universe, (See the first item: “Religious humanists regard the universe as self-existing and not created.”). If something non-material brought all existing matter into being, that would be a supernatural cause, and atheists deny that anything supernatural exists. The standard Big Bang theory requires that all the matter in the universe come into being out of nothing. The Big Bang has been confirmed by experimental evidence such as redshift measurements, light element abundances and the cosmic microwave background radiation. This falsifies eternal models of the universe, which are required by atheist Scriptures.

You all need to know about the experimental evidence that confirms the Big Bang creation out of nothing.