Triton Talk

The title of Monday’s colloquium was “The Cryogenic World of Triton”, and the speaker was Gary Peterson of the Department of Geological Sciences, San Diego State University. Here he is in action:

gary Peterson

The talk was very qualitative. Perhaps at times too qualitative for a lot of the Physicist audience, I’ve gathered from comments, but everyone agreed that it was still very interesting. Some of the qualitative aspects were necessary, since there’s not much data available for the sorts of things he wanted to talk about. So he was extrapolating Click to continue reading this post

Space Opera

Well, I tried to avoid blogging about this, starting yesterday since I was really annoyed that its initial appearance as a story was in the Science section of a number of organizations, and it has nothing whatsoever to do with science. But now that it has arrived in the more general news sections of some publications (see a nice Independent UK article here, for example), I am happier to talk about it, and also to briefly remark upon any tentative connection with science that might be there.

The case is the one concerning the arrest of astronaut Lisa Marie Nowak on what has now been alleged to be attempted first-degree murder. (It stated out as mere vehicle burglary, battery, and destruction of evidence, but was later upgraded.) Basically, in case you’ve not heard, Ms Nowak drove 950 miles from Texas to Florida to stalk and Click to continue reading this post

How Many Legislators Does it Take to Change a Lightbulb?

compact fluorescent bulbincandescent bulbThis is a joke (the title) that works rather well, while being a serious issue as well. It’s all about trying to reduce our energy waste here in California, and contribute to the commitment to reduce greenhouse gas emissions. The idea is to change from the garden variety incandescent bulbs (see left) to the compact fluorescent ones (see right). It’s striking that more people don’t already use them. Ordinary bulbs (apparently 2 billion of them sold every year in the USA) convert only about 5 percent of the energy that they consume into light. The rest is just wasted heat.

For the same amount of light output, compact fluorescents use much less energy: A 25 Watt compact fluorescent gives about the same amount of light as a 75 Watt incandescent… and it lasts over 10 times longer. The technology has improved quite Click to continue reading this post

Philosophia Naturalis #6

the brainI just learned that the blog carnival Philosophia Naturalis #6 is underway. It is hosted at Science and Reason. Several city blocks have been shut down to make room for the revelry you get at carnivals.

The monthly collection of recent posts on physics and related topics from around the blog world is very good, and I bet that there are several that will catch your eye. Go and look!

Don’t forget to ask the Brain (click right) a question!

-cvj

Not Nominal

sea launch platformThe Sea Launch organization is a private satellite launch company. This is arguably the shape of the future of a lot of space activity, so it is interesting to keep an eye on them. They launch, using their Zenit-3SL rocket, from a latitude near the Equator, out in the Pacific ocean, from a platform that looks a lot like an oil platform (it is a converted one, in fact). The whole thing sails out from near here, at Long Beach, and steams along to the launch site, like some super-villians’ outfit. It’s all rather James Bond. More about them here.

sea launch zenit rocketIt’s strangely fascinating to look at the videos of past launches. (The October 30th 2006 XM-4 launch video, for example. Their archive is here.) They have a sort of old-fashioned feel to them that is riveting, although utterly boring at the same time since there’s not actually a lot going on, and the video quality is not so great. If I’m honest, I think the attraction for me is the slightly mechanical Eastern-European-accented female voices saying things like “we have lift off”… “separation phase complete”… “propulsion system nominal”… “pitch angle nominal”…. “auxiliary control nominal”….. Most of the videos are pretty much these people saying stuff is nominal, with occasional bursts of chatter layered above and below. It was strange entertainment for me last night while cooking. Go and have a look. Their whole site is worth a browse.

They had a bit of a bad day yesterday, though. Definitely not nominal. News story here. Spectacular video on YouTube here:
Click to continue reading this post

Sabine Hossenfelder: My Inspiration

Sabine HossenfelderToday, a guest post. I’m excited, because it’s from one of my favourite bloggers, Sabine Hossenfelder, or “Bee” as you may know her from her comments here, and of course her blog Backreaction.

Bee giving a guest post here on Asymptotia originated in a suggestion I made in the comments of an earlier post of mine. Bee had asked me to do a post on her blog as part of her excellent series of guest posts about what made her guest choose to go into physics. Pressed for time, and not sure whether I’d really have anything new or interesting to say about myself, I stalled for time (I thought) by saying I’d do it in exchange for her doing a post here on a similar subject. She rapidly came up with the post. And of course it’s a great one. I’m so on the spot now.

Anyway, here’s Bee! -cvj
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I just sat down with the best intention to write a lengthy blah on Clifford’s question what inspires me. Now that I sit here, hands above the keyboard, I am facing a problem. It’s not that the question is too difficult, it’s too easy to answer. I get inspiration everywhere. Reading books, seeing movies, taking a walk – ah yes, also from scrolling through blogs. Most of all by talking to my friends and colleagues. The problem is now that I’m too inspired not to shamelessly use the opportunity of writing a guest post for Clifford 😉 So let me redirect the question to your opportunity to use your inspiration.

Had you been born some thousand years ago, your life would have been pretty much determined by where and when you were born, and whether you happened to be a man or a woman. You’d have spent most of your time striving to survive. Undoubtedly, you’d have considered your generation very progressive, still you’d have worked hard to make a better future for those coming after you. And of course our generation says since then we’ve made a lot of progress! But what is it? Is it a 6 lane highway, 50 different Jelly Bean flavors, the size of a 2 GB USB stick, a life expectation of 80 years, plastic surgery, weblogs for everybody?

In my opinion, a society’s maturity is measured not by the development (alias shrinking) of more and more technological gadgets, but by its ability to let (wo)men follow their passion. Progress is what makes our life easier. It is what gives us more time, more freedom. It is our understanding of nature that has allowed us to spend less time on the struggle to survive, and given us the opportunity to live. It has given us the freedom to follow all the stray thoughts that came with the evolution of the homo sapiens’ large brain: the everlasting wish to find and understand our place in the universe that we are part of.

A search that everybody of us undergoes in his or her own way. Some find their place Click to continue reading this post

Hubble Trouble

hubble graphicAs you can tell by putting “hubble” into the blog’s search engine on the right, the Hubble Space Telescope has been a strikingly successful eye on what’s going on (and what went on) in the universe, and very powerful tool in lots of research. A lot of that research is done with the instrument called the Advanced Camera for Surveys (ACS), which have been the instrument in most heavy demand by researchers since it went online in 2002 (Hubble was launched much earlier, in 1990 of course). The instrument stopped working a few days ago (see e.g. stories here and here [update: and especially here]), and is not expected to become operational again without direct intervention. Given that the Hubble orbits some 360 miles above the earth, this is not an easy thing to do.

There are other instruments on board too, but the loss of use of this one is a heavy Click to continue reading this post

Talk about the Talk

charles stevensChuck Stevens’ visit went very well indeed. The talk was excellent, and well attended by faculty and students from both Physics and Astronomy Department, and the Neurosciences Research Institute. I’ll tell you a bit more about what he said in a subsequent post, along with pointing to video and slides from the talk, I hope. (Click on left for larger view.)

By the way, when I got to the Steve Reich concert venue, there was a huge line of people waiting to get in. They eventually turned a lot of us (myself included) away due to lack of space.

So I got on my bike and cycled rapidly up Figueroa Street to downtown and found the restaurant where some of my colleagues had taken the guest for dinner. Excellent conversation instead of excellent music. A good trade.

Here’s something I passed on the way to the restaurant. Took a picture while waiting Click to continue reading this post

New Einstein Letters

I’m not supposed to be blogging, since I’ve got to go and set up and introduce the visiting speaker, but I thought I’d point you to an LA Times (front page!) article by John Johnson, talking about some new material about Einstein and his more “human” side, as opposed to the standard image that is portrayed*. The letters (from about 1915, before the completion of his General Theory of Relativity – see a post I did about that Click to continue reading this post