

I have been traveling quite a bit over the past few weeks. In fact, I have never been as far away before. It all started with an innocent trip through the first few chapters of a book called ‘A Short History of Nearly Everything’ by Bill Bryson. I resigned myself to spend my evenings with a 600 page popular science companion instead of watching the boob tube, but I never made it to the last stop. I got stuck in the first few chapter of the book, where the author writes about Space.
The problem with reading about a subject you know nothing about, is that there are so many hurdles. I kept stubbing my toes against a new concept in just about every other sentence. I had to take detours to visit Wikipedia, which led me to You tube, which led me to an inventor’s site and so on. As you can imagine, I got completely lost on the back roads of my trip and I didn’t even have a GPS with me. It took mother nature to help me find my way back. There was this big storm that zapped my router and I was staring at black nothingness. No, it wasn’t interstellar space, it was my computer’s black screen.
But I was hooked. As soon as I rebooted, I found myself back in Youtube land, gorging on videos about space until my head started to spin.
I knew of course that space is BIG, but on this trip I realized how incomprehensibly big it is. Even physicists have a hard time coming up with new units of measurement to describe the incredible distances out there. The measly Astronomical Unit (AU: 92,955,000 miles), or even the light year (5,878,625,400,000 miles) fall short of measuring intergalactic space. We now have the parsec (3.27 light years), the kiloparsec (1000 parsecs) and megaparsec (1 million parsecs). The center of our galaxy, for example, is about 8 kiloparsecs away, which equals 8,000 parsecs, or 26,160 light years. Adding all the required zeros to convert it to an earthly measurement, only makes it more incomprehensible.
Not only are distances mind blowingly large, but the stuff in space, the stuff we are exploring, is by far the exception rather than the rule. That is why I am in such awe of what scientists have discovered. Looking for stuff and sending a probe to observe it, is like finding a pebble in the Pacific Ocean, sending a diver into shark infested waters and expect him to faithfully come back with important information without being shredded to pieces.
Take Pluto, for instance. It took the New Horizons space probe 9 years to reach this dwarf planet, which is smaller than our moon. It is inside the Kuiper Belt, a doughnut shaped region beyond Neptune. Pluto is a mere 3.67 billion miles from the sun, which is 40 times further than the earth!
I cannot decide which is more fascinating: the images that the probe sent back, or the probe itself. It was launched in 2006 and on its way to Pluto, New Horizons was put to sleep, to save energy, but not before it did a few gymnastics tricks called ‘gravitational slingshots’. Those are ingenious maneuvers to increase a space probe’s speed. The probe gets as close to the planet as possible without being sucked in and by using a planet’s orbital speed, it catapults away from it. It shaved 3 years off of New Horizons’ travel time. Read more...