Is there intelligent life elsewhere in the galaxy?

Is there intelligent life elsewhere in the Universe?  The topic was in the news this week when astronomers at UC Berkeley and University of Hawaii released this report.  These scientists say that about 20% of sun-like stars have earth-sized planets in their habitable zones, the zone where liquid water can exist on the surface of the planet.  Since sun-like stars comprise about 20% of the 200 billion stars in our Milky Way galaxy, some 8 billion earth-sized planets in habitable zones may exist in our galaxy alone! Actually quite more than that, since six percent of red dwarf stars have habitable, Earth-sized planets. and red dwarf stars are the most common stars in our galaxy.  So we’re talking potentially tens of billions of habitable earth-sized planets in our galaxy!

How many extra-solar civilizations could there be in our galaxy?  The Drake Equation gives us a good plan for finding out, even if it doesn’t actually answer the question:

Drake Equation
Drake Equation, composed by astronomer Frank Drake in 1961.

 

 

N = is the number of detectable civilizations in our galaxy.

This TED video that explains the rest of the equation and its implications:

 

The number of such intelligent, communicative civilizations out there might be on the order of magnitude of the length of time the average such civilization exists.  That might not bode well for the possibility of eventually communicating with these civilizations…

Stay tuned.

 

Catechisms and Other Doctrinal References

Book Review: “No One Sees God – The Dark Night of Atheists and Believers”

By Michael Novak, Doubleday, 2008

No one has ever seen God, but as long as we love one another God remains in us and his love comes to its perfection in us.” 1 John 4:12 (NJB)

Novak’s states his purpose in writing the book very succinctly:  “…unbelievers and believers need to learn a new habit of reasoned and mutually respectful conversation…“, and in it, he addresses the recent attacks on Judeo-Christian belief launched by the likes of Richard Dawkins, Daniel Dennett and Sam Harris.

I bought this book soon after it was published to help me deal with a newly declared atheist in my family, but only picked it up to read recently, when, after a terrible family tragedy, I experienced my own dark night and the questions Novak addresses became my own questions.

Novak begins his work by relating the stories of well known saints that suffered their own dark night – long stretches when God seemed silent or absent:  Theresa of Calcutta, Therese of Lisieux, St. John of the Cross, and Teresa of Avila.  He then proceeds to narrate a long-running written conversation that he had with a thoughtful atheist, bringing forth insights as he does so.

Novak reflects deeply on the the presence of evil and suffering in the world, which is perhaps the atheists’ most popular complaint.  While he does not present the book as a list of lists, by the book’s conclusion adventuresome readers will learn 4 points of agreement between believers and atheists, 4 virtues to practice when God seems silent, 5 insulting ways to speak about God (and how to avoid doing so), 4 limitations of secularism, and 2 fundamental deficiencies of the secular worldview.

If this book will help us converse with atheists, it will do so by allowing them to see a depth in the Christian perspective that is missing in their caricatures of the faith.  And even if it doesn’t, it might well bolster the faith of believers like myself, jarred by unexpected tragedy and searching for meaning.