Saturday, January 31, 2009

1979 Schwinn Stingray (red)

Man, from age seven to age fourteen or so, there were few things more important to me than my bicycle. It was everything.

It was transportation to school (occasionally), the swimming pool (all summer long), friends' houses, relatives' houses, stores, and movies. If I wanted a pack of gum or some kind of novelty from the drug store, I didn't ask my parents for a ride or for money. I used my own money, and I got myself there.

It was freedom to head out at 9:00 a.m. and not come back until dinner time during the summer.

It was ownership. . . ownership at a time in my life when I held supreme authority of very few other things in my life. My bike was MINE. . . not my sister's and not my friend's. Dudes had to ask before they could just pick up my bike and ride it.

It was responsibility. . . a maintenance responsibility prefiguring the responsibility of owning a car later in life. Keep the tires inflated, keep the chain lubed, maybe consider tearing it apart to install a double goose neck or a new seat or a hand break or something cool. And lock it up or it'll get swiped. Big, important decisions and responsibilities for a kid.

It was speed, too. . . the kind of speed a kid without a driver's license can't get any other way. Buzzing down a long residential hill as fast as the cars usually traveled gave me a kind of speed that almost seemed illegal. Speed AND danger. Something happened almost every day on that bike that surprised me or scared me or made me really take notice of things. A wobble at 30 mph. A rock in the road that almost sent me sprawling. A near collision with friend or a neighborhood dog. Riding my bike everywhere was the only thing my parents knowingly allowed me to do that routinely threatened my life. No helmets. No pads. Screw it. Just ride.

It was pain, too. . . the impetus for countless bruises, abrasions, serious cuts and full-on head injuries. My bike taught me to live with and play through pain, while also teaching me the finer points of scab care and maintenance. Bike riding, like life, was sometimes painful.

Perhaps most importantly, my bike was a lesson, as simple as it was profound. Getting where I was going required genuine effort on my part. No one else would help. As soon as I identified a destination, my mental GPS calculated the obstacles and risks involved. Getting to the movie theater meant tackling that huge hill on Lindbergh Blvd and that frighteningly narrow stretch of Mattis Road that had no shoulder. Before I started any trip, I weighed its benefits against the effort and risk involved. . . a cost benefit analysis as comprehensive and honest as anything I work on today.

And in the end, the benefit of a bike trip always seemed to outweigh the effort it would take. I learned that sweating up the hill to get there always promised a breezy, effortless return trip. And there was nothing sweeter to a sweaty 11 year old boy than coasting down-hill with hot summer wind pushing his hair back.

I loved my bike.

Eclipses. . .

When we experience a perfect, full solar eclipse here on Earth, the moon is directly between our line of sight and the sun. The result is that the sun is perfectly hidden by the moon, looking to us like a pitch black spot over the sun. Just a fraction of the sun's corona is visible around the outside edge of the moon. . . enough to really screw your eyes up if you look up at it with naked eyes sporting dilated pupils.

What are the odds that the Earth would come equipped with one (and only one) moon whose size and distance from earth make it perfect for eclipsing the sun for us?

Keep it the same size and move it farther from or closer to the Earth a significant amount, and you change how much of our view of the sky the moon occupies. This would change how much (or little) of the sun it blots out during a solar eclipse. Similarly, keep its distance from Earth the same but make it a bigger or smaller moon, and it stops being the perfect solar eclipse tool.

I know that the Earth's distance from the sun differs depending on its location along an elliptical orbit. And I know that the moon's distance from the earth fluctuates. Overall, though, I think the tolerances in those two variables are tight enough that full eclipses look very much the same here on planet Earth from year to year.

I wonder if there are any other planets in our solar system that have such a serendipitous combination of lunar and orbital factors?

Dunno. This is the kind of stuff that keeps me up at night.