Archive for January 2nd, 2008

F ring and Mimas

Regular readers know that

So when you have Emily posting on an illusion dealing with Saturn’s rings, you know you’re onto something pretty cool.

See how the ring looks darker where it crosses the moon Mimas than when you see it over a dark background? Emily checked, and the ring pixel values are actually higher there!

I suspect Emily’s conclusion is correct; light from Mimas is coming through the ring, adding to its pixel value. But the rest of Mimas is so bright that the ring looks dark compared it it. That’s an odd illusion, but a well-known one.

January 2nd, 2008 7:06 PM by Phil Plait in Astronomy, Cool stuff, NASA, Pretty pictures | 13 comments | RSS feed | Trackback >

Don’t you just hate perihelion?

If you can guess what line I twisted for the title, and from what movie, you win nothing.

But either way, you do win a front row seat to the Sun! The Earth arrived at perihelion on January 3 at midnight Universal Time (it probably wasn’t exactly at midnight, but that’s the accuracy listed at the US Naval Observatory website), which was an hour ago as I post this. Perihelion is when the Earth is closest to the Sun on its elliptical orbit (which only marginally affects the seasons).

The distance to the Sun at perihelion is about 147 million kilometers, and at aphelion — the farthest distance, duh — is about 5 million km farther out. You won’t notice the giant Sun looming down on us, of course, since the change in distance is pretty small, so the size of the Sun only changes about 3% over six months.

No eggs will stand on end, no forces vast and mysterious will reverse themselves, and no prophecies will finally come to fruition. Perihelion is just something cool, and now you know we’re there.

By the way, I would have posted this earlier today, but sometimes even astronomers get confused over the whole "midnight in England is earlier on the day before here in the US" thing.

January 2nd, 2008 6:00 PM by Phil Plait in Astronomy, Cool stuff | 24 comments | RSS feed | Trackback >

How do you spell Ihnatko again?

This has nothing to do with astronomy, but my close personal friend Andy Ihnatko is an internationally beloved technology columnist, and he has created a vidcast which made me laugh many times. And seeing as how he is really a very minor player on this whole interwebs thingy, while I am a powerful juggernaut, I will throw Andy a bone by embedding his video here.

And yes, it’s true: when Isaac Asimov died, he bequeathed his sideburns to Andy.

January 2nd, 2008 3:00 PM by Phil Plait in Humor | 10 comments | RSS feed | Trackback >

My New Year’s Resolution

About one arcminute, with my glasses on.

January 2nd, 2008 1:04 PM by Phil Plait in Astronomy, Humor | 49 comments | RSS feed | Trackback >

The Open Lab 2007

A few weeks ago (last year now!) I mentioned that I was submitting some of my blog entries for The Open Lab, a book compendium of the best science blog posts from 2007.

I am very pleased to announce that I got in! The post they chose was Happy New Year Arbitrary Orbital Marker (technically, that was posted in 2006, so shhhh!), which I recently and coincidentally just reposted a few days ago. :-)
The complete list of winning entries is listed over at Bora’s place, A Blog Around the Clock. It looks like a pretty good selection, but I think I’ll hold off reading them all online; the book will be coming out very shortly, and will be available on amazon.com. When that’s set, I’ll let y’all know.

January 2nd, 2008 11:07 AM by Phil Plait in About this blog, Astronomy, Cool stuff | 5 comments | RSS feed | Trackback >

Ron Paul: Theocrat by his own words

Before I even get to the content of this post, I will warn commenters right now TO KEEP IT POLITE. No swearing, and no name-calling. Comments like that will be deleted or marked as spam immediately.

If you disliked what I wrote about Ron Paul — and many of you did, for reasons that had little to do with what I wrote — then you’ll hate what Joe M wrote at Merit-Bound Alley about him.

Back in 2003, Paul wrote an astonishingly ill-informed and ridiculous screed entitled "The War On Religion". It is incredibly fact-deficient, but does repeat many of the far-right memes so desperately spread by the likes of Bill O’Reilly and others at Fox News. Paul makes the same mistakes so many others do, saying that "the secular Left" feels that "religion must be driven from public view". That’s just plain silly. Everyone I know on the left understands that doing so would be illegal and unconstitutional. The only people who say this, ironically, are the fearmongers on the right, trying to scare the base.

Rational people understand that the Constitution is pretty clear on this issue, and many court cases have stated it as well: the government cannot endorse a particular religion. That means that a courthouse, government office, or state building must allow any religion, and even those with no religion, equal access to display their beliefs, or lack thereof. If you want a Nativity creche, that’s fine, as long as it’s part of a greater display of symbols of other religions (and even — gasp — atheism).

Paul disagrees. He says that "[t]he justification is always that someone, somewhere, might possibly be offended or feel uncomfortable living in the midst of a largely Christian society, so all must yield to the fragile sensibilities of the few."

Baloney. The justification is the First Amendment. In my earlier post about Paul, I mentioned that people who deny evolution are prey to those who want to tear down the First Amendment, who want to teach religion in school. I didn’t know at the time how Paul really felt, so my earlier post is even more justified now. From reading Paul’s essay, it seems to me that he hadn’t read the Constitution very well before writing what he did.

In his essay, Paul says, "Earlier this month, firemen near Chicago reluctantly removed Christmas decorations from their firehouse after a complaint by some embittered busybody."

"Embittered busybody"? Assuming the firehouse was tax-payer funded, that person was defending the Constitution! Paul’s statement, and name-calling, is even more frightening considering that Paul has sworn an oath to defend the Constitution. Far from calling names, he should be standing behind the person who made the complaint.

Joe M’s essay at Merit-Bound Alley makes it very clear — with citations — that Paul is fuzzy on the Constitution (Paul says it is "replete with references to God", when in fact God is not mentioned even once in the Constitution). Joe M’s essay is well done, and exposes most of the fallaciousness of Paul’s statements. If you are a Ron Paul supporter, I strongly urge you to read it.

And for those of you who say that Paul’s personal beliefs will not affect his judgment, I ask you to read his essay very carefully. His own words read like those from a man who will cheerfully appoint judges to weaken further the Constitutional guarantee of freedom for and from religion. He clearly misunderstands the First Amendment to a profound degree.

It’s too bad: in another essay, he makes some very salient points about religion and government, though he still accuses the "political left" of wanting a secular society, which is, again, baloney. The left, as a political party, wants people to be able to choose their faith, or lack thereof, freely, and not have the government tell them what they can or cannot worship. I see this a lot with Paul: he seems to make good sense in some issues, then goes off into Never Never Land with others.

And I stand by my earlier claim: Ron Paul is either a theocrat, or is a panderer to those who want one. Neither of those choices is what America needs.

But hey! At least he’s better than Huckabee.

January 2nd, 2008 7:00 AM by Phil Plait in Antiscience, Piece of mind, Politics, Religion | 174 comments | RSS feed | Trackback >