Astronomy
drorzel | June 22, 2011p>(This post is part of the new round of interviews of non-academic scientists, giving the responses of Brad Holden, of the University of California Observatories (which, OK, is affiliated with an academic institution, but this is not a traditional faculty-type job). The goal is to provide some additional information for science students thinking about their fiuture careers, describing options beyond the assumed default Ph.D.--post-doc--academic-job track.)
1) What is your non-academic job?
I am an astronomer at an observatory, specifically the University of California Observatories. Our…
drorzel | May 23, 2011As I have admitted previously, I have a fondness for tv shows about UFO's, the loonier the better. So, when I learned that there was a show called When Aliens Attack airing last night on the National Geographic channel, I was all over that. I'm happy to report that it did not disappoint-- it brought the crazy, in exactly the manner I was hoping for.
The premise of the show is a look at what would happen if aliens turned up on Earth, and turned out to be hostile. It claims to be a look at military contingency plans for dealing with an alien invasion, though the "plans" in question seem to be…
drorzel | February 10, 2011Barring a major disaster, I am scheduled to teach one of our Scholars Research Seminar classes next winter. I've been kicking the idea for this around for a while, with the semi-clever title "A Brief History of Timekeeping." The idea is to talk about the different technologies people have used to mark the passage of time, from Stonehenge down to modern atomic clocks. There's a lot of good science in there, from astronomy (sundials and the like) to basic mechanics (pendulums and so on) to quantum physics (atomic clocks) and even relativity. And there's plenty of room for side trips into other…
drorzel | January 5, 2011Back in the fall, I got an email from my UK publisher asking me if I'd be willing to read and possibly blurb a forthcoming book, The Four Percent Universe: Dark Matter, Dark Energy, and the Race to Discover the Rest of Reality by Richard Panek. The book isn't exactly in my field, but there really wasn't any way I'd turn down a request like that. Coincidentally, I received an ARC of the book a few days later from the US publisher. They weren't asking for a blurb, but I'm always happy to get free books.
From the title, I expected this to be another book laying out the now-standard model (if not…
drorzel | December 29, 2010Most of what would ordinarily be blogging time this morning got used up writing a response to a question at the
Physics Stack Exchange. But having put all that effort in over there, I might as well put it to use here, too...
The question comes from a person who did a poster on terminology at the recently concluded American Geophysical Union meeting, offering the following definition of "data":
Values collected as part of a scientific investigation; may be qualified as 'science data'. This includes uncalibrated values (raw data), derived values (calibrated data), and other transformations of…
drorzel | December 28, 2010It's the last week of the (calendar) year, which means it's a good time to recap the previous twelve months worth of scientific news. Typically, publications like Physics World will publish a list of top ten physics stories of 2010, but we're all Web 2.0 these days, so it seems more appropriate to put this to a poll:
What is the top physics story of 2010?survey software
I've used the Physics World list as a starting point, because you have to start somewhere. I added a few options to cover the possibility that they left something out, and, of course, you know where the comments are.
This…
drorzel | December 20, 2010We didn't do a Christmas tree last year, because we figured SteelyKid wasn't yet old enough to be safe around it. We put one up this year, though, and she's been very grown-up and careful around it, so all is well.
The return of the Chateau Steelypips Christmas tree means I can also revive a sort-of tradition here, namely the posting of pictures of ornaments with explanations of how they're really about SCIENCE! (say that last word a la thomas Dolby for the full effect). We'll start with an easy one:
This is a shiny green ball with a big ring around it. As this clearly isn't one of the…
drorzel | November 30, 2010Somebody asked a question at the Physics Stack Exchange site about the speed of light and the definition of the meter that touches on an issue I think is interesting enough to expand on a little here.
The questioner notes that the speed of light is defined to be 299,792,458 m/s and the meter is defined to be the distance traveled by light in 1/299,792,458 seconds, and asks if that doesn't seem a little circular. There are actually three relevant quantities here, though, the third being the second, which is defined as 9,192,631,770 oscillations of the light associated with the transition…
drorzel | November 25, 2010It's Thanksgiving here in the US, so blogging will be light to nonexistent. For the sake of those looking for a quick escape from the chaos of a family gathering, or, you know, those poor benighted souls in other countries for whom this is just another Thursday, here's a thematically appropriate poll about science:
What are you most thankful for?online surveys
Have a great holiday/ Thursday.
drorzel | November 24, 2010Given that I'm currently working on a book about relativity, I'm spending a lot of time idly thinking about various relativistic effects. Many of these won't end up in the final book, but they're fun to think about.
One thing that occurred to be earlier, while thinking about something else entirely, is the Doppler shift. In particular, I was thinking about the detection of planets around other stars, which is often done using the Doppler shift due to the orbiting planet's tug on its star. If the orbit is more or less aligned with our line of sight to the star, then the star wobbles back and…
drorzel | October 12, 2010SteelyKid is a big fan of the classic children's book Goodnight Moon, which, if you haven't spent the last sixty-odd years in a cave, you probably know features a bunny saying goodnight to a variety of objects in a great, green room. The attentive toddler will find a lot to look at in the pictures-- there's a mouse in every one that SteelyKid delights in pointing out-- but an inquiring adult might well ask "Just how long does it take this bunny to say goodnight to all this stuff, anyway?"
Well, we can answer this question with SCIENCE! You see, there are six pictures in the book showing the…
drorzel | September 14, 2010Not long ago, a new preprint on the fine structure constant got a bunch of press, nicely summed up by the Knight Science Journalism Tracker last week. I meant to say something about this last week, but what with it being the first week of classes and all, I didn't find the time.
I still think it's worth writing about, though, so after a reproduction of the key figure, we'll have the usual Q&A-format explanation of why I don't quite trust this result:
So what's this all about? The preprint in question is the latest in a series of attempts to measure possible changes in the fine structure…
drorzel | August 31, 2010Sunday was a really long day around Chateau Steelypips, and I couldn't see staying awake to watch the premiere of Phil Plait's Bad Universe on the Discovery Channel, so I'm way late in writing about it. I DVRed it, though, and watched it last night.
The theme of the premiere/ pilot was killer rocks from out of space, and focused on Phil getting his MythBusters on to test various ideas about asteroid or comet impacts and how to stop them. They blew up a scale model, shot projectiles into various types of rock to simulate nuclear bombs or kinetic impacts, all in the name of testing what would…
drorzel | August 20, 2010It's nearly time for classes to resume, which means it's time for a zillion stories about Beloit College's annual Kids These Days List, listing off a bunch of things that this year's entering college class, who were mostly born in 1992, have always taken for granted. A sample:
1. Few in the class know how to write in cursive.
2. Email is just too slow, and they seldom if ever use snail mail.
3. "Go West, Young College Grad" has always implied "and don't stop until you get to Asia...and learn Chinese along the way."
4. Al Gore has always been animated.
5. Los Angelenos have always been trying…
drorzel | July 24, 2010Climate change is a major crisis, don't get me wrong, and it's something that needs to be discussed extensively in both scientific and policy circles. We're pumping carbon dioxide into the atmosphere at rather too high a rate, and getting something done about that is a key priority.
It's possible, though, to take the obsession on climate and CO_2 a little too far, though. Such as this news story from Physics World:
A cosmic gamma-ray burst striking the Earth could be harmful to ocean plankton at depths of up to 75 m, according to a team of Cuban researchers. These organisms account for up to…
drorzel | July 22, 2010Over at A Most Curious Planet, Alexandra Jellicoe offers a story with the provocative headline Is Science Sexist?, which spins off an anecdote from astronomy:
I was listening to Radio 4 a few months ago and the discussion about gender intelligence lodged in the deeper recesses of my brain unthought-of until recently when I went to see Jocelyn Bell Burnell talking of her 'Eureka' moment. She discovered the existence of neutron stars called Pulsar's in 1967 and I think she can safely be considered one of England's most pioneering and gifted scientists. I was struck by her comments that she…
drorzel | July 19, 2010Over at Jeff Vandemeer's blog, Rachel Swirsky has a series ofm guest posts (start here if you prefer direct post links) about the recently completed Launch Pad workshop. this is a NASA funded workshop bringing a group of writers together for six days of lectures on modern astronomy from working astronomers. From the workshop web site:
Launch Pad is a NASA-funded education/public outreach effort supplementing Mike Brotherton's space-based astronomical research. Our budget allows us to provide a workshop that is essentially free to participants. Our primary goal is to teach writers of all…
drorzel | July 14, 2010With the rumors of a Higgs Boson detected at Fermilab now getting the sort of official denial that in politics would mean the rumors were about to be confirmed in spectacular fashion, it's looking like we'll have to wait a little while longer before the next "Holy Grail" of physics gets discovered.
Strictly speaking, the only thing I recall being officially dubbed a "Holy Grail" that's been discovered was Bose-Einstein Condensation (BEC), first produced by eventual Nobelists Carl Wieman and Eric Cornell in 1995. Somebody, I think it was Keith Burnett of Oxford, was quoted in the media calling…
drorzel | June 10, 2010The Science Channel debuted a new show last night, Through the Wormhole with Morgan Freeman, with the premier apparently designed by committee to piss off as many Internet types as possible. The overall theme was "Is there a creator?" and it featured physicist-turned-Anglican-priest John Polkinghorne talking about fine-tuning but no atheist rebuttal. It spent a good ten minutes on Garrett Lisi and his E8 theory, making it sound a whole lot more complete than it is. And it got this aggressively stupid review in the Times:
Oh, let's face it: it was hard to concentrate on the first half of the…
drorzel | June 10, 2010One of the questions asked of Neil deGrasse Tyson at the WSF thing last week was "When did you change from a mild-mannered astrophysicist to a rock-star scientist?" (or something close to that phrasing). In his answer, he said that after his first tv interview was edited down to a three-second shot of him wiggling his hips, he made a deliberate effort to practice giving sound bites-- answering questions in 3-4 sentences with a good "hook" for the tv people to work with.
I thought of this when I stumbled across the following YouTube clips, which were shot by TV Ontario when I was at the…