Category Archives: science

Look Up!

By | | ,
13 Comments

Comet McNaught seems to be a gift that keeps on giving. Last night here in Los Angeles, just after the sun set, I stepped out to look from a nearby elevated spot – and there it was. With binoculars, it’s an impressive sight, and possibly the last naked-eye visible comet sighting for a long time. Unfortunately, I have no equipment that I can use to take a decent photo for you, so I can’t share what I saw.

But you can go out and look. I give some viewing tips below.

What you’re probably puzzled about now is why the experts kept getting the “last chance to see” message wrong. People seemed very sure back on Wednesday that it would be gone from view -and I did a post to that effect myself- and and the same thing was said on Thursday and then on Friday.

I’m guessing that this is because although they can track the position rather well, they […] Click to continue reading this post →

Andromeda Now Makes Sense

By | | , ,
7 Comments

andromeda IRThe Andromeda Galaxy is bigger than previously thought. Perhaps as much as five times bigger. I know that you’re thinking – “Oh, that’s because most of it is dark matter, right?” No, this is not another dark matter story. In fact, there are many newly discovered stars from a recent study! The suburbs of the galaxy are much more extensive than previously identified. It’s rather good news, since the galaxy makes more sense than it did before, in the context of our understanding of how galaxies form and evolve. (Image above is of Andromeda in the infra-red, from NASA.)

The point here is that current theories of evolution for galaxies have the oldest stars Click to continue reading this post →

All Hands on Deck

By | | , , , ,
8 Comments

all hands on deck Well, it’s the middle of the Bleak Midwinter, and the first day of classes of the new semester. Mine start tomorrow. It is time to get myself back into the classroom-teaching frame of mind -although to be honest I don’t think the break was long enough for me to have got sufficiently far removed from it: 85% of the research tasks that I wanted to do during the break remain undone.

Anyway, I must sit and contemplate what I am going to talk about in the graduate course entitled “Selected Topics in Particle Physics”. It’s my lunch break, so I thought I’d chat to you for a bit.

Rumour has it that everyone is expecting some sort of string theory course, reasonably complementary to the one that my colleague Nick Warner taught here two years ago. I’ve no interest in just teaching the standard string theory topics – a good and motivated graduate student can just look them up in a book if motivated enough (if they can’t they’re in the wrong business) – and so I’d like to throw in some material that is not packaged together in the standard way, and give them an education that emphasizes powerful ideas and techniques that are relevant to more than just standard string theory research, but theoretical physics in general.

You see, this is one of the wonderful things about the topic that you don’t hear about much when people say things (and write books for a general audience) about how much it is supposedly taking over smart young minds and leading them astray: It is a fantastic framework for training good physicists for whatever new and useful ideas and physics will come along in the future, whether it is string theory or some other topic. The point is that string theory has developed in so many different ways, and […] Click to continue reading this post →

Dark Matter in 3D

By | | , , , ,
26 Comments

Have a look at this:

hubble 3d dark matter

What is it? It is an image of part of the three dimensional (see below) distribution of clumps of dark matter in our universe, produced by an extensive survey using the Hubble telescope. How did they produce it, given that dark matter is -by definition- not visible? They deduced the presence of the chunks of dark matter by looking at the gravitational […] Click to continue reading this post →

Categorically Not! – Movement

By | | , , , ,
Comments Off on Categorically Not! – Movement

The next Categorically Not! is Sunday 7th January. The Categorically Not! series of events that are held at the Santa Monica Art Studios, (with ocassional exceptions). It’s a series – started and run by science writer K. C. Cole – of fun and informative conversations deliberately ignoring the traditional boundaries between art, science, humanities, and other subjects. I strongly encourage you to come to them if you’re in the area. There’s a website of past and upcoming events here. You can also have a look at two of the last two descriptions I did of some events here and here, and the description of a recent special one on Uncertainty that was held at the USC campus is here.

Here is K.C. Cole’s description of the upcoming programme:

“Movement: You can’t leave home without it. In fact, you can’t get anywhere without it—whether you’re trying to bring about political change, compose music, send a robot to Mars, or merely make your way across a room. You can’t even […] Click to continue reading this post →

Science on TV – Having Your Say

By | | , , , ,
7 Comments

Recall that I told you about the pilot for the upcoming show Wired Science in an earlier blog post. It airs today, (Wednesday, January 3) on PBS. It was made by KCET here in Los angeles, and as you may recall from the post, in August I learned some interesting things about the context in which the show sits. It is rather interesting. It’s all part of a head-to-head competition, or “experiment” as PBS are calling it.

You see, there are two other shows being piloted on PBS over the next couple of weeks too. One is Science Investigators, made by WGBH, Boston, and the other is 22nd Century, made by Towers Productions (I think). They are three different takes on a science TV show format. The casting, scripting, presentation… all these things vary a great deal.

They’re really trying to come up with newer, more accessible formats, with the aim of getting science out there to the general public. This is a great thing. Only one show will “win”, sadly. The prize is the go ahead to make more episodes, and have them air on PBS. The judges…. this is the important part… The Judges are YOU. Go to the PBS site […] Click to continue reading this post →

Science Sense

By | | , ,
12 Comments

I learned just now that there’s a charity in the UK called Sense About Science. From their website, I read:

Sense About Science is an independent charitable trust. We respond to the misrepresentation of science and scientific evidence on issues that matter to society, from scares about plastic bottles, fluoride and the MMR vaccine to controversies about genetic modification, stem cell research and radiation.

Our recent and current priorities include alternative medicine, MRI, detox, nuclear power, evidence in public health advice, weather patterns and an educational resource on peer review.

This is good to hear about. Recall earlier that I was wondering aloud whether there was anything in the UK that is equivalent to the USA’s Union of Concerned Scientists, or the recently formed Scientists and Engineers for America. This is not really an equivalent organization (they consult with scientists, rather than being a scientist-run organisation for example, and they seem relatively disconnected from the makers of public policy, where a lot of the real battles are to be fought), but they are at least swimming in the same waters.

I learned about them because they’re in the news today. ‘Tis the season for […] Click to continue reading this post →

Time for the Inventor Story

By | | ,
4 Comments

three way ping pong by katrin stantonYes, right on schedule. The UFO story was yesterday, and today the Inventor story. It starts out with his three-way ping-pong table (of course! – and it’s called TriPong1), but before I even clicked on it I knew there’d be a “oh, and by the way, he has an alternative theory of the universe”, at the end.

I was not disappointed. My favourite bit of Katrin Stanton’s AP story: […] Click to continue reading this post →

A Different Perspective

By | | , ,
12 Comments

The Bad Astronomy Blog gives a top ten list of astronomy images for 2006. There are some really wonderful choices there, and Phil Plait gives a good deal of discussion of each one. The winner is this fantastic back-lit (by the sun, not some giant NASA flashgun) image of Saturn taken -of course- by the Cassini mission:

Back-Lit Saturn by Cassini

Now there’s another wonderful feature of this photo that makes it such a clear winner. […] Click to continue reading this post →

Planet Hunter

By | | , ,
2 Comments

This is a diagram of the layout of the equipment on the Corot (COnvection, ROtation and planetary Transits) space telescope, launched recently from a site in Kazakhstan:

corot satellite

It’s a European Space Agency (ESA) mission, primarily run by the Centre National d’Etudes Spatiales (CNES – the French Space Agency, if you will) and it’s going to be looking closely at about 120,000 stars for signs of planetary bodies in orbit around them, in addition to studying the stars themselves. There’s a BBC story here, with video, more figured and images, and links to other sites, such as this condensed mission guide. The Proteus platform in the diagram refers to that fact that this is but one of a series of craft in the “Proteus” series, the platform itself being the design of the core containing the instrumentation and control systems of the device. Learn more about that here.

By going over to ESA’s site, you can learn a lot more about the scientific objectives and […] Click to continue reading this post →

Attack of the Clones?

By | | , ,
9 Comments

cloned cowsNo, probably not, but we are probably in for a battle. The FDA is said to be about to announce the approval of using cloned animals for food. The announcement will be on Thursday, but there are several news reports about it already. Here is a link to an AP article written by Libby Quaid. (I also borrowed from that article the picture -left, by Chris Gardner- of cloned dairy cows Cyagra1 and Genesis.)

What will the battle be about? Well, Let’s get the fear-mongering (that opponents of this announcement will use to their advantage) out of the way first. If these were indeed clones in the purest sense of the word, produced in unquestionable circumstances, in an industry that did not already have several unsettling and dysfunctional features to it (see for example here) then there would be no issue. The bottom line is that we should be no more scared of clones than we should be of twins.

But it is not that simple. According to the article to which I pointed, here are claims -backed up with documentation- (I have not read the research, so am merely reporting that it exists) that the cloned animals are not produced in a manner that would be acceptable for the production of animals by other means -there are still many deaths and deformities in the process, and these birth defects are still not fully understood.

Carol Tucker Foreman, director of food policy at the Consumer Federation of America, said the FDA is ignoring research that shows cloning results in more deaths and deformed animals than other reproductive technologies.

The consumer federation will ask food companies and supermarkets to refuse to sell food from clones, she said.

“Meat and milk from cloned animals have no benefit for consumers, and consumers don’t want them in their foods,” Foreman said.

That alone might not be so terrible, you’re thinking, but the big thing […] Click to continue reading this post →

Really Old Stars?

By | | , ,
11 Comments

One sees them a lot around here, given the town I’m in, but that’s not what I’m talking about.

There’s a Spitzer telescope press release about the possible discovery of the most early stars detected to date. These would be the very first stars to have formed in the universe. Remembering that the universe is 13.7 billion years old, pause for a moment to be impressed by the claim of Kashlinsky, Arendt, Mather and Moseley that these stars appeared less than a billion years after the big bang. You should also read some discussion in John Baez’ recent post. [Update: See remarks from Ned Wright at the end of this post.]

The new milestone on the timeline of the universe’s history, if this is correct, would look roughly as in this image (from the press release):

timeline of the universe from spitzer

Extraordinary claims (like this one) require extraordinary evidence, and so there’ll no […] Click to continue reading this post →