This is My Brain on Science

Hi! I'm Eric Korpela. You may know me from such blog posts as "Ewoks live under my deck" and "How Spock and Sylar are related." As part of my continuing series on what the heck scientists do, I'd like to talk about brains. You may ask, "What is it like in a scientist's brain?" Well, it's dark, it's moist, and it's as warm as Daytona in July.*. Just like it is in yours.

The real answer is that I can't really tell you what's going on inside anyone's head but mine. For example, I look at my wife and think, "Why is she carrying all the groceries? And how can I make her do that again next time?" I really have no clue. That's because I've only been me.

The way my brain works now is pretty different from the way it worked when I was starting college, so I'm pretty sure that most of what I do is learned behavior. If so, maybe this scientist's brain will tell us something. Let's start with my thought processes for an everyday task like seeing an article on The Huffington Post -- for example, this one: "Venus May Be Slowing Down, New ESA Data Suggests."

Phase 1: WTF?

That makes absolutely no freaking sense! How can Venus be slowing down? It's in a periodic orbit, and we'd notice changes in the orbit without having to send a spacecraft there.

Oh, its rotation is slowing... Maybe that could happen.

Phase 2: Skepticism

A 6-and-a-half-minute rotation period change... Are they sure their clock isn't just wrong? What would they have for a clock on a Venus orbiter? I'd use two temperature-controlled clocks with sync with a distance-adjusted time stream from Earth every 24 hours. That would definitely be better than 6.5 minutes, and the people who built the clocks for this orbiter thought about it for more than 30 seconds. I wonder how much they make? Do I remember this same issue happening with Magellan?

Phase X: Getting Sidetracked

In a holographic universe, is information really conserved, or can the universe lie to us if there's no way we can check its answers?

Phase 3: Calculating

You can't have the rotation of Venus slowing without the rotational energy going somewhere. Where could it go? The obvious places are Mercury, the Earth, and the Moon. You'd need a gravitational torque on Venus. Is it really that lopsided? (That's what she said.) Note to self: check the Magellan gravity maps.

OK, Venus and Earth are about the same mass, and this change is small compared to the rotational energy of either, so the change in angular velocity would be inversely proportional to the angular velocity of Earth. That's a 2-millisecond change in the length of a day. Didn't happen.

Orbital energy. The earth's orbital kinetic energy is about 10,000 times its rotational energy, and that change in Venus's rotational energy was 1 billionth of that. The velocity change required would be unnoticeable, so there's probably some interaction due to the near resonance between Venus' rotation and Earth's orbit.

Could Venus have been slowing down this way for its entire history? Five billion years is 250 million times the 20 years this change took. That would give Venus a tenth the rotational energy of Earth, or a 72-hour day. Lots of assumptions there. It's probably more likely this is a periodic change as the rotation rate moves in and out of resonance with Earth's year. If we wait 20 years, I guess we'll find out.

Phase 4: Resignation:

I suppose I could read the whole article now.

Way to Go Eric!

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