Polemics

Jupiter deflects comets and asteroids that might otherwise hit Earth

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Circumstellar Habitable Zone
Circumstellar Habitable Zone

This is an older article from Astrobiology magazine, but it shows how important Jupiter is for habitability.

Excerpt:

To a biologist, the ingredients needed to form life include water, heat and organic chemicals. But some in the astrophysics and astronomy community argue that life, at least advanced life, may require an additional component: a Jupiter-sized planet in the solar neighborhood.

“A long-period Jupiter may be a prerequisite for advanced life,” said Dr. Alan Boss, a researcher in planetary formation. Boss, who works at the Carnegie Institution of Washington, is a member of the NASA Astrobiology Institute (NAI).

In our own solar system, Jupiter, with its enormous gravitational field, plays an important protective role. By deflecting comets and asteroids that might otherwise hit Earth, Jupiter has helped to create a more stable environment for life to evolve here. It’s generally believed that a massive impact was responsible 65 million years ago for wiping out dinosaurs on Earth. If not for Jupiter, it’s possible that many other such impacts would have occurred throughout Earth’s history, preventing advanced life from ever gaining a foothold.

Jupiter is significant not only for its size but also for its location in our solar system, far from the Sun. Because it orbits at slightly more than 5 AU (astronomical units the distance between the Earth and the Sun is 1 AU), there is plenty of room in the inner part of our Solar System to accommodate a range of smaller planets.

Within the inner solar system there exists a region, known as the habitable zone, where liquid water, and therefore life, can potentially exist on a planet’s surface. Without liquid water, life as we know it is not possible. The habitable zone around our Sun stretches roughly from the orbit of Venus to the orbit of Mars. Venus is generally believed to be too hot to support life. Earth, it appears, is just right. And the jury is still out on Mars.

Understanding the role that Jupiter plays in our own Solar System helps astronomers focus their search for habitable planets around other stars. “If,” Boss explains, “a Jupiter-mass planet on a stable, circular orbit [around another star at] around 4 to 5 AU was found, without any evidence for other gas giant planets with shorter period orbits, such a discovery would be like a neon light in the cosmos pointed toward that star, saying ‘Look here!’. That star would be a prime target for looking for a habitable, Earth-like planet.”

Previously, I blogged about how the circular orbit of Saturn and the mass of our star also play a role in making our planet habitable.

People who are not curious about science sort of take these blessings for granted and push away the God who is responsible for the clever life-permitting design of our habitat. In contrast, theists are curious and excited about what science tells us about the Creator. Theists care about science, but naturalists have to sort of keep experimental science at arm’s length – away from the presuppositions and assumptions that allow them to have autonomy to live life without respect, accountability and gratitude. Naturalists take refuge in the relief provided by speculative science and science fiction. They like to listen to their leaders speculate about speculative theories, and willingly buy up books by snarky speculators who think that nothing is really something (Krauss), or who think that the cosmic fine-tuning is not real (Stenger), or who think that silicon-based life is a viable scenario (Rosenberg), etc. But theists prefer actual science. Truth matters to us, and we willingly adjust our behavior to fit the scientific facts.

UPDATE: Rebuttal to me here at The Secular Outpost.

Commentary

What happens to your children when they arrive at university?

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This Philadelphia Inquirer editorial is from famous ethics professor Robert P. George.

He writes:

When many of the flower children and new-left activists of the ’60s became professors and university administrators in the ’70s and ’80s, they did not entirely overthrow the idea of liberal-arts education. Many proclaimed themselves its loyal partisans.Now, it is true that many think it their mission to create soldiers in the battle for “social change” – aspiring ACLU lawyers, Planned Parenthood volunteers, and “community organizers.” But others resist the idea that learning should be instrumentalized. They profess allegiance to the idea that the point of liberal education is to enrich and even liberate the student-learner. That’s what is supposed to be “liberal” about liberal-arts learning – it is supposed to convey the knowledge and impart the intellectual skills and habits of mind that are liberating.Still, there is a chasm between the idea of liberal-arts education as classically conceived, and the conception promoted by some (mercifully, not all) in positions of influence in academic departments today. Many of today’s academic humanists and social scientists have a different view of what students need liberation from.In their view (what I will call the revisionist conception), it is liberation from traditional social constraints and moral norms – beliefs, principles, and structures by which earlier generations of Americans and people in the West generally had been taught to govern themselves for the sake of personal virtue and the common good. For them, it has become a dogma that these traditional norms and structures are irrational – “hang ups” that stifle our personalities by impeding desire-fulfillment.

Liberal-arts learning is thus seen as a way to undermine whatever is left of the old norms and structures. Teaching and scholarship are meant either (1) to expose the texts and traditions once regarded as the intellectual treasures of our civilization – the Bible, Plato, Augustine, Dante, Aquinas, Chaucer, Shakespeare, Austen, Locke, Gibbon, the authors of The Federalist, etc. – as mere propaganda propping up unjust (racist, sexist, classist, homophobic) social orders, or still worse (2) to show how they can be “reappropriated” to subvert allegedly unjust contemporary social orders.

Beyond this, liberal-arts learning is meant to enable students to become “authentic” – true to themselves – which means, to these liberal-arts revisionists, acting on one’s feelings and desires. For the self is understood precisely as a bundle of feelings and desires, to be acted on without regard to supposedly outmoded moral and social norms.

On the revisionist conception of personal authenticity, whatever impedes one from doing what one most wants (unless what one happens to want would be politically incorrect) is a mere hang-up. So religious convictions and traditional moral ideals are to be transcended for the sake of the free and full development of one’s personality – for example, by acting on sexual desires that one might have been “repressing.”

This is something I often encounter when dealing with college kids, especially with women who went to college and fell under the influence of feminism. Even if they come back to the faith later and want to get serious about it, there is a lingering effect of their indoctrination in college that causes them to doubt the traditional virtues and prefer to make decisions on the basis of feelings. They really, really believe in being true to their feelings, and deciding what to do on the basis of these feelings, rather then thinking about virtues like stewardship, or moral obligations in general. We are not good at loving other people, and focusing on ourselves above all does not help us to do that.

Mentoring

How to apologize effectively: responsibility, restitution, repentance

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I guess everyone already knows about Gary Chapman and his 5 Love Languages. But have you heard of his 5 Love Languages of apologies?

I want to focus on two of them that I think are important, because I don’t want people to think that just saying “I’m sorry” is good enough.

Here they are (straight out of his book):

Apology Language #3: Making Restitution

In the public arena, our emphasis upon restitution is based upon our sense of justice. The one who commits the crime should pay for the wrongdoing. In contrast, in the private sphere of family and other close relationships, our desire for restitution is almost always based upon our need for love. After being hurt deeply, we need the reassurance that the person who hurt us still loves us.

“How could they love me and do that?” is the question that lingers in our minds. The words “I’m sorry; I was wrong” may not be enough.

For some people, restitution is their primary apology language. For them the statement, “It is not right for me to have treated you that way,” must be followed with “What can I do to show you that I still care about you?” Without this effort at restitution, this person will question the sincerity of the apology. They will continue to feel unloved even though you may have said, “I am sorry; I was wrong.” They wait for the reassurance that you genuinely love them.

The question, then, is how do we make restitution in the most effective way? Since the heart of restitution is reassuring the spouse or family member that you genuinely love him or her, it is essential to express restitution in the love language of the other person.

[…]If restitution is the primary apology language of an individual, then this becomes the most important part of the apology. “I’m sorry; I was wrong” will never be taken as sincere if these words are not accompanied by a sincere effort at restitution. They wait for the assurance that you still genuinely love them. Without your effort to make amends, the apology will not have the desired results of forgiveness.

Apology Language #4: Genuinely Repenting

The word repentance means “to turn around” or “to change one’s mind.” In the context of an apology, it means that an individual realizes that his or her present behavior is destructive. The person regrets the pain he or she is causing the other person, and he chooses to change his behavior.

Without genuine repentance, the other languages of apology may fall on deaf ears. What people who’ve been hurt want to know is, “Do you intend to change, or will this happen again next week?”

How then do we speak the language of repentance?

  • It begins with an expression of intent to change. When we share our intention to change with the person we have offended, we are communicating to them what is going on inside of us. They get a glimpse of our heart—and this often is the language that convinces them we mean what we say.
  • The second step down the road of repentance is developing a plan for implementing change.Often apologies fail to be successful in restoring the relationship because there is no plan for making positive change.
  • The third step down the road of repentance is implementing the plan. Following through with the plan gives evidence to the offended party that your apology was sincere.

Most people do not expect perfection after an apology, but they do expect to see effort.

Thus, expressing your desire to change and coming up with a plan is an extremely important part of an apology to this person. Inviting the offended person to help you come up with a plan for change is perhaps the best way to effectively show repentance.

Here are some practical tips that I recommend to someone who has done something morally wrong and who wants to apologize.

To fix the problem you need more than talk

To me, the only thing that needs an apology is breaking a moral rule – you can’t beat someone up for just making a mistake. Whenever someone breaks a moral rule with me, like disrespecting me or being selfish, then I pick out a book for them to read and ask them to read it and then write something about how what they learned in the book applies to what they did to me. I don’t pick very long books! But I do this for a very important reason.

The very important reason is that I don’t trust people who just agree with me. I don’t trust people’s words. If someone is really sorry about something, then I want them to read something that describes the moral rule that they broke, and to be willing to listen to the feelings of the person they harmed by breaking that rule. That goes a long way in my mind.