Thursday, March 20, 2014

The Astonishing Trend Line of Planetary Discovery

Earlier this week, two NASA-affiliated teams announced the discovery of 715 new planets around other stars. I have to pause on that number for a moment. From the dawn of Mesopotamian astronomy around 2000 BC until 1992 AD, astronomers discovered a grand total of three planets: Uranus, Neptune, and Pluto. (I’m still counting Pluto as a planet. So sue me.) Now, in a single data release, scientists have found 715, bringing the total number of known alien worlds to 1,750.

A brief history of planetary discovery. Blue shows early discoveries, red shows previous Kepler discoveries. The gold bar displays the 715 new planets announced this week. (Credit: NASA Ames/SETI/J Rowe) A brief history of planetary discovery. Blue shows early discoveries, red shows previous Kepler discoveries. The gold bar displays the 715 new planets announced this week.
(Credit:
NASA Ames/SETI/J Rowe)

And the news is even more amazing than the raw numbers convey. Through almost all of history, our solar system contained the only real estate that we knew about. Yes, astronomers studied other stars and nebulae, but they knew nothing of planets–the only places where life can exist, so far as we know, the only places where humans might set down and explore. Now we know that other planets exist, and that they come in a wide variety of exotic forms never before imagined.

Extrapolating from the latest statistics, our galaxy must contain at least 5 billion Earth-size planets, and perhaps ten times that many, orbiting in locations that could be hospitable for life. We have truly entered a new era in the human relationship to the cosmos–one that I would call the 4th Great Era of Discovery.

What were the other 3? I’ll have a lot more to say about that in my next post.

Follow me on Twitter: @coreyspowell

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Monday, March 17, 2014

Talking Science, Aliens, And RoboCop With Kids!

Kyle Mutant SeasonThe hardest part of communicating science isn’t when it’s in front of your peers or viewers or readers—the people you expect to know what you are talking about and why. For me, it’s talking science with kids. There isn’t anything like the inquisitive stare of a pre-teen to elicit the feeling you are about to speak in front of your biggest audience ever.

At the same time, communicating science to kids can be the most rewarding part of the job. That highbrow metaphor you use to make sure readers understand exactly how that particular protein interacts with that particular cell in this particular animal doesn’t mean a thing anymore. You have to be at the top of your game, ready to field questions on everything from RoboCop to the plausibility of Ancient Aliens.

Returning for a second time, I tried to do just that with Gil, the incredibly precocious 11-year old host of the Nerdist Network’s Mutant Season podcast. It’s another long one, and we tend to get caught up in our own nerdiness, but we had a lot of fun. You can listen to the whole episode here and tell me how I did in the comments below. If you want something a bit more zombie-heavy, check out our first discussion too!

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