Cosmos "Deeper, Deeper, and Deeper Still": Nitpicks, Nods, and News

This week takes us from the farthest we can see in the universe to the tiny heart of an atom. (cosmosontv.com)

This week's episode took us from the unfathomably enormous to the unimaginably tiny, with stops along the way at the mind-bendingly complex. We learn immediately that there are more atoms in the tip of your little finger than there are stars in the observable universe, so you know that atoms must be small. Then later in the episode we learn that if an atom were scaled up to the size of a cathedral, the nucleus would be no bigger than a mote of dust. One thing that could have been mentioned here is that the nucleus contains essentially all of the mass of an atom, which makes it incredibly dense. If you could somehow fill a teaspoon with matter as dense as an atomic nucleus, it would weigh 2 billion tons, or about 330 Great Pyramids of Giza. It would be so massive that from about 3.7 meters away (12 feet) it would have the same gravitational pull on you as does the entire Earth. Luckily, these super-dense objects are safely cocooned and separated from one another inside their diffuse electron clouds, which also happen to do all of the chemical bonding work necessary to build complex molecules like DNA and ethanol.

If you thought that was cool, come deeper still and let's get down to nitpicks.

Going Deeper: "Is it wrong to talk people out of their faith?"

Hey everyone. I've noticed a few interesting points in the flood of comments on my article at RDFRS that I'd like to respond to. I'll keep updating this post as I find interesting points to comment on, so keep checking in.

About that headline...

"Take away someone's faith" and "Talk someone out of their faith" are the ways that it is commonly phrased by the defensive believer. Obviously it would be wrong to dogmatically assert that their religion is wrong, as it would be wrong to deceive someone into being convinced by bad reasoning and faulty logic to abandon their faith. That's not what I advocate, and it's why I explain how the wording of this dodge is meant to change the subject and make you seem like the bad guy. What I am doing when I have a conversation with a believer is (hopefully) having a plain and open discussion of the evidence and reasons for their belief. The goal is to get them to evaluate that evidence for themselves (as you should constantly do for yourself!). If you're both honest about it then you should together reach the correct conclusion (which I am currently convinced is non-religion and the abandonment of faith). You and they are learning to be better at reasoning!

Cosmos: "Hiding in the Light" Nitpicks, Nods, and News

Pink Floyd's major contribution to popular science knowledge. (cosmosontv.com)

It seems that this episode was a bit polarizing. Based on the opinions of those I've spoken with, some people saw one of the more disjointed, rambling, incoherent installments in the series, while I thought it was one of the most engaging and explanatory (Luckily I'm not alone). I really enjoyed the entire story of light, from discovering that it travels in straight lines to finding Fraunhofer's lines in the spectra of distant stars and planets, proving that everything we see in the cosmos is made of the same "human stuff" (chuckles to self).

We'll get to the power of science stuff shortly, but the other thread in this episode was pointing out early steps towards a modern scientific method, the only approach to knowledge that doubts even itself while still leading us to all the mind-warping conclusions that we've been hearing about for the past few weeks. One of the main themes of the show is the fragility of free thought. We've seen fantastic ideas and questions silenced by authorities selfishly preserving their own power from doubt and inquiry, and this week we saw how an act of kindness and the gift of an education lead to huge technological leaps for a different-minded king.

Cosmos "A Sky Full of Ghosts". Nitpicks, Nods, and News.

Hubble's view of the Antennae Galaxies made it on TV! (cosmosontv.com)

This week, Neil deGrasse Tyson and Cosmos showed us a little bit of how incredibly strange the Universe can be when you just consider that light travels at a finite speed. The jaw-dropping scene above (discovered by William Herschel!) shows two colliding galaxies as they were 45 million years ago because it has taken the light from this titanic gravitational maelstrom that long to reach us. Given that the lifetimes of the largest and brightest blue stars can be as short as a million years or so, much of the light recorded here comes from long-dead stars—hence the title of this episode.

It's even weirder when you think about travelling at close to the speed of light. Einstein's theory of special relativity basically boils down to "Everyone measures the same speed of light". Then, for emphasis, it adds: "No, I mean it. No matter what absolute nonsense has to be true for that to happen, that's what happens." Note here that "what absolute nonsense has to occur" includes things like time passing more slowly the faster you travel relative to someone else, light shifting wavelengths so that you could see radio waves or gamma rays with your eyes, objects behaving as though they have more mass at high speeds, and on and on. Then, once you add in the principle that gravity is equivalent to acceleration, you get massive objects bending light travelling past them, clocks running slower the closer you are to a massive object, and those ridiculous objects that are so massive not even light can escape their gravity: black holes.

Oh, and maybe there is an infinite hierarchy of other universes in each black hole.

Let's get started!

Cosmos "When Knowledge Conquered Fear": Nitpicks, Nods, and News

A young Edmond Halley is more curious than frightened. (cosmosontv.com)

Missed this episode? Check it out for free here!
This week, Cosmos took us on a journey from our childlike fear of the unknown to the edge of the Solar System, from astrology to astronomy, and from what we thought was an ad hoc chaos, to the law-abiding cosmos. The story of comets begins with our inchoate understanding of the night sky as a divine gift to aid us in knowing when to sow and when to reap. Any disturbance in such a wondrous and orderly display was certain to foretell some disturbance on Earth, just as the rising of Orion foretells the coming of winter. The Chinese had even worked out a relationship between the kind of disaster and the number of cometary tails!

Kepler's laws of planetary motion implied something simpler was going on, though. The planets didn't move in perfect circles, but rather ellipses with the Sun at one focus. What a peculiar arrangement for God, the ultimate clock-maker, to use—Every good horologist knows that circles are simpler. There had to be a reason, some force that pulls the planets towards the Sun, but no one could think of what it could depend on. After a few interesting speed bumps (like the History of Fish eating up the Royal Society's annual budget), Edmond Halley was able to convince Isaac Newton to publish his Philosophiae Naturalis Principia Mathematica, and are we ever glad he did. Not only did it propose the correct form of the gravitational force (it was considered just a force then, fellow nitpickers), but it detailed the mathematical relationship between the force and the motion of the planets, and introduced us to Newton's Laws of Motion, still the backbone of engineering mechanics over 300 years after their discovery.

The last link in the chain comes with Halley's use of the new gravitational laws to compute the period of the comet which we now call his. He predicted its return 16 years after his death, and when it was confirmed it became the first object known to orbit the Sun apart from the planets. So returning to the original model of comets as harbingers of doom, either God had something nasty in mind every 76 years, or the ancients were a tad oversure of the correlation between disasters and bad stars.

Let's take a look at some of this week's notables:

Cosmos: "Some of the Things that Molecules Do" Nitpicks, Nods, and News

"These are some of the things that molecules do..." (cosmosontv.com)

This week's Cosmos was all about how the "star stuff" from last week managed to stick together into a form that looked up at the stars and discovered where it came from. There are two things that are amazing about the Cosmos, and the first two episodes hit each nail on the head. Last week was about scale: You can't imagine just how big it all is. This is the other half of the cosmic coin: You also can't believe how incredibly complex it is! "There are as many atoms in a strand of your DNA as there are stars in a typical galaxy." Oh, and they didn't mention, but could have, that there are as many galaxies in the observable universe as there are stars in a galaxy too.

It's. So. Big. And. Complex. I. Don't. Even...

Cosmos Premiere: Nitpicks, Nods, and News

The Cosmic Calendar makes its return (cosmosontv.com)

Update: Missed the first episode? No problem, watch it online here!

The premiere of Cosmos was stunningly gorgeous and a great introduction to what I hope is the format for the series: A whirlwind tour of the scientific subject at hand using the Ship of the Imagination and flashy visual effects coupled with an animated story about a weekly "hero" story from the past. Seth MacFarlane and Ann Druyan, the executive producers, have said that the show is aimed at people who never knew they had an interest in science, and the flashy style of the presentation certainly shows that entertainment is a top priority, but even for someone like me (who obviously is already pretty far down the rabbit hole) there was something new, interesting, and provocative on this first episode alone. After a quick look at everything from the scale of the Earth and up, I'm already anxious for the next episode, which looks to be another jaw-dropping romp, this time of the tiny, inner universe between the wisps of our upper atmosphere and the dark bottoms of our oceans.

To bide my time and keep myself from watching all the previews and sneak peeks and spoiling it all, I think I'll publish a quick look each week at the latest episode.  I'll try and highlight something I thought was inaccurate (Nitpicks), something I was glad to see in the show (Nods), and something I learned (News). If I can't find something for a category on a given week, then I get to rant a little! Sounds fair? OK, let's get started.