Archive for February 9th, 2008

Feb 09 2008

Godzilla

So I just finished watching the 1998 "Godzilla" remake with The Little Astronomer. After seeing (and enjoying) "Cloverfield", it seemed the thing to do.

When it came out 10 years ago, I saw it in the theater. I thought it was great! Fun, silly, great effects, didn’t take itself seriously… yet it was almost universally panned. Everyone in the world seemed to hate it but me. So when I popped the disk into the player, I figured maybe this was another case of an old movie I liked that wouldn’t hold up.

I was wrong. I mean, I was right in the first place. This movie is great.

Here’s the deal: a lot of people hated it because they wanted a rubber-suit Godzilla movie. Too bad. Others hated it because they wanted an updated version more true to the actual original Japanese movie (which I need to see; the only version I saw of it was the terribly edited one with Raymond Burr jammed into it, who stuck out like a bug on a plate). Too bad. Some people thought it was too silly. Too bad.

It’s a monster movie, folks. The people who made it knew that, so they threw in lots of funny stuff, letting the viewer know the movie isn’t supposed to be taken too seriously. Completely unrealistic premise, ridiculous events, outrageously overdone chase scenes. But that’s the point! It’s a monster movie. It’s supposed to be fun. Three people from "The Simpsons" were in it, for Pete’s sake!

I think it was a lot of fun. TLA liked it too. The effects held up surprisingly well, too, which is a plus. Not perfect, but not bad. Also, having just seen "Cloverfield", it’s fun to compare them. There are plenty of parallels: both take place in NYC, there is an important scene with the Brooklyn Bridge in both, subways are critical, and so on.

All in all, I say if you want a popcorn movie (or in our case, hamburgers and fries and then bowls of chocolate fudge ice cream), this is a pretty good pick.

69 responses so far

Feb 09 2008

Minor Shuttle damage?

Published in NASA

Picture of a potential loose blanket on the ShuttleDamaris Sarria is an astronaut trainee a Boeing engineer who is on a team inspecting the Shuttle for damage it might get when it launches. She is reporting a potential issue with a piece of insulating blanket that fits on the starboard Orbital Maneuvering System pod, the round cowling that makes the tail of the Orbiter flare out. In the image you can see the bump on the side of the pod which may be a loose blanket. This sort of thing has happened before, and can be dealt with if needed.

It’s possible that the ISS astronauts have gotten a better picture which will aid analysis. Stay tuned to her blog for more info, and I’ll mirror it here as well.

14 responses so far

Feb 09 2008

Big ol’ mirror to fly in space

The European Space Agency is getting ready to loft the biggest mirror ever in a space telescope: the 3.5 meter giant for the Herschel Space Telescope. That’s big: Hubble’s is only 2.4 meters, so this one will have over twice the area of Hubble.

Incredibly, the whole mirror assembly — the big primary, a smaller secondary, and the support structure — will mass only 320 kilograms (700 pounds). That’s incredibly lightweight for such a large amount of hardware! I’m impressed.

The picture above shows this cool device (click here for a very embiggened picture). The telescope is optimized for far infrared light; meaning it will look at dusty disks around stars, planets and stars forming, ancient distant galaxies, and more. No space telescope has ever looked at just these wavelengths before, so this should provide an interesting view of the Universe. It’s supposed to launch late this year. I can’t wait!

35 responses so far

Feb 09 2008

Least massive protoplanetary disk found

File this under "Hey, that’s kinda cool": astronomers have found the least massive disk ever around a star. This press release is nifty, but has a major d’oh! moment for me. Read on.

Subaru telescope picture of the disk around the red dwarf FN Tau

Stars form in different ways, but the final birth pangs are roughly the same for everyone. A flattened disk of material forms from a collapsing cloud of gas and dust. The center heats up as more material piles on, eventually reaching high enough temperatures and densities to ignite nuclear fusion. A star is born.

The disk of material around the star can form planets. The types of planets that form vary depending on the type of star, whether it’s a binary star, how fast the big planets form, what the material is in the disk, and about a hundred other things. A few years ago this was conjecture, but now it’s a solid fact: we see these disks around many young stars.

A team of Japanese astronomers pointed the massive 8.2 meter Subaru telescope at the star FN Tau, which is known to be young. It’s also a dinky star, classified as an M5, making it a red dwarf (about 0.2 times the Sun’s mass). The astronomers looked in the infrared, where a warm disk is bright, and directly detected the disk. They had to block the light from the star (which is overwhelmingly bright), too.

What they saw is the picture posted above (click to embiggen). The black splotches are due to the telescope and the coronagraph, the device used to block the starlight. The disk is obvious enough. It’s big in human terms, with a diameter 260 times the Earth-Sun distance (Neptune is about 30 times that distance, so this disk is more than 8 times bigger than the solar system). However, as disks go, that’s rather small. In fact, the estimated mass (6% of the star’s mass, or about 1% of the Sun’s mass) makes it the smallest protoplanetary disk ever directly detected.

That’s cool.

However, I do have an issue with the press release. First, there’s a claim that I think is not true: it says this is the lowest mass disk around the lowest mass star ever seen. However, in 2005 a disk was detected around a brown dwarf star, which has far lower mass than FN Tau. It might be the lowest mass star for which a disk is directly detected, but that distinction is not clear. No biggie, but worth pointing out.

There is a bigger problem, though. The press release says that Earth-sized planets can form in this disk, which is OK (the disk is too low-mass to form anything as big as Jupiter). However, the press release title is a very misleading "A Lightweight Disk Around a Lightweight Star May Harbor Earth-like Planet". It says (emphasis mine):

One of the questions to come out during the study was what kind of planets can be formed from the disk around FN Tau? To date, astronomers worldwide have found 270 extrasolar planets using the indirect detection method, and all are primarily Jupiter-like giant planets; the least massive exoplanet is still 5 times heavier than Earth. Because it surrounds a smaller star, the disk about FN Tau was believed to more likely contain Earth-like planets. The best-fit model used during this study shows that the lightweight disk around FN Tau could only produce Earth-like planets. The planetary system formation theory also predicted that the disk is able to form planets lighter than the Earth within 30 AU, the distance where we find planets in our Solar System. The lack of heavier objects, such as a Jupiter-size planet, in the FN Tau disk system is consistent with the astronomers’ theoretical expectation.

The problem is, there is no indication that planets are forming in this disk. None. The release itself says the disk is missing the usual tell-tale sign of planetary formation, like lumps, gaps, and spiral patterns. Worse, the disk is young, only about 100,000 years old, and that’s pretty early to be forming planets. Now let me be clear: it may very well be forming Earth-like planets (or will form them in the future), but it is very misleading to state it the way they did. It’s sensationalized.

This is a very interesting result all by its lonesome. Why try to overblow it? I see that a lot, and I wish it would stop. NASA got mocked — and still does — because it overused headlines about Hubble finding "the best evidence yet" of black holes every time Hubble observed a black hole (I made this joke recently to some science journalists and they all laughed knowingly). If this kind of hyperbole continues, the public may get burned out on such things.

It’s OK to have fun with titles, but they shouldn’t be misleading.

25 responses so far