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22 April 2012

Welcome to science. You're gonna like it here

Dr. Plait posted a link to Tree Lobster's the other day (an excellent web comic I suggest you read), and in that post he linked to a very old post of his that I found particularly inspiring.  I just want to repeat it here for folks to read.  (Keep in mind, it was written in 2005, so the number of extra solar planets have now increased by a factor of 10.)  Again, I can't help but wonder why people have to turn to totally made up things in order to try to find a sense of wonder in the universe, when the universe provides so much more than even our imaginations can  provide.  There is no danger in knowing more.  However, ignorance can be incredibly costly.  Why not revel in the fact that our own cleverness has actually gotten us this far, and that it should get us further, instead of being bound by bronze age myths and a rejection of the thing that got us so far.  That is:  Science!

By the way, this speech by Dr. Plait was delivered to a group of students that were participating in a science fair.  I can only hope that other science fair students get such an inspiring message instead of being told that the pursuit of knowledge is wrong in some way.

I know a place where the Sun never sets.
It’s a mountain, and it’s on the Moon. It sticks up so high that even as the Moon spins, it’s in perpetual daylight. Radiation from the Sun pours down on there day and night, 24 hours a day — well, the Moon’s day is actually about 4 weeks long, so the sunlight pours down there 708 hours a day.

I know a place where the Sun never shines. It’s at the bottom of the ocean. A crack in the crust there exudes nasty chemicals and heats the water to the boiling point. This would kill a human instantly, but there are creatures there, bacteria, that thrive. They eat the sulfur from the vent, and excrete sulfuric acid.

I know a place where the temperature is 15 million degrees, and the pressure would crush you to a microscopic dot. That place is the core of the Sun.

I know a place where the magnetic fields would rip you apart, atom by atom: the surface of a neutron star, a magnetar.

I know a place where life began billions of years ago. That place is here, the Earth.

I know these places because I’m a scientist.

Science is a way of finding things out. It’s a way of testing what’s real. It’s what Richard Feynman called "A way of not fooling ourselves."

No astrologer ever predicted the existence of Uranus, Neptune, or Pluto. No modern astrologer had a clue about Sedna, a ball of ice half the size of Pluto that orbits even farther out. No astrologer predicted the more than 150 planets now known to orbit other suns.

But scientists did.

No psychic, despite their claims, has ever helped the police solve a crime. But forensic scientists have, all the time.

It wasn’t someone who practices homeopathy who found a cure for smallpox, or polio. Scientists did, medical scientists.

No creationist ever cracked the genetic code. Chemists did. Molecular biologists did.

They used physics. They used math. They used chemistry, biology, astronomy, engineering.
They used science.

These are all the things you discovered doing your projects. All the things that brought you here today.

Computers? Cell phones? Rockets to Saturn, probes to the ocean floor, PSP, gamecubes, gameboys, X-boxes? All by scientists.

Those places I talked about before? You can get to know them too. You can experience the wonder of seeing them for the first time, the thrill of discovery, the incredible, visceral feeling of doing something no one has ever done before, seen things no one has seen before, know something no one else has ever known.

No crystal balls, no tarot cards, no horoscopes. Just you, your brain, and your ability to think.

Welcome to science. You’re gonna like it here.

21 April 2012

Which Moon has the best chance for life?

I have a mancrush on Dr. Phil Plait.  That is a well known joke/fact.  He tackles a subject that my wife, daughter, and I were discussing just the other day (ain't coincidence fun?).  So I am just delighted to popularize this particular video of Bad Astronomy Q&A.
My money is more on Europa versus the other ones.  Enceladus in my opinion has a bit too unstable at the geyser sources.  As for Titan, the chemistry is a bit too unknown for the type of complexity and energy that would be conducive to life.  That said, I would like to see probes to all three (Europa, Titan, Enceladus in order of precedence).  Even if the chemistry of Titan doesn't support life, there is at least something to learn in that environment.