Archive

Posts Tagged ‘science’

Please, Disagree With Me!

February 3, 2014 Leave a comment

ImageI write a semi-regular blog on the Skeptoid website, as well as post regular musings and ramblings on Twitter and Facebook. In these writings, I am usually inspired by some set of data. As a scientist, data is something that removes much of the bias we carry as humans. Even if the data analysis or the conclusions drawn are manipulated, the raw data is harder to manipulate. Yes, people can outright lie, or can use poor data collection or design a poor test, but that is usually revealed by the design itself, or data from someone else. So I always use this as my core in forming my beliefs and opinions.

Over the last year, I have had people unfollow me on Facebook and Twitter over my opinions. I do come across strong in my conclusions. If you don’t know that about me – please take this as your notice. It catches people off-guard at times. It can offend them. Please just know that is in almost every case not my intent. I want to learn new things. I post things because I want them to be challenged. I also am not going to simply accept your conclusion because you say it. I am going to need convincing. It needs to be logical. It needs to have supporting data. I don’t hate you nor do I mean to offend you. Let’s talk. And if we don’t agree – then we don’t. I bet on many other things we do agree.

I often get classified politically as a bad libertarian. It fits pretty well. The ideology of being libertarian makes the society as a whole stronger. But I also believe the weakest of the society would be left far behind if we followed those ideals perfectly. So to me I always fight the liberal part of me and the libertarian part of me. The hardest part is in many cases, we don’t have good data on what would work best, only economic theories which simply cannot account for all variations of real-life. So I’m a bad libertarian. I’m ok with that.

I have changed my opinion on many things over the years. I used to think we should punish drug users and sellers more. Now, after seeing the data and understanding the idea of personal freedom – I understand that drugs, while still harmful, should be legal. What should be illegal is putting others in a potentially harmful situation because of drugs (driving while under the influence for example). So I am for stopping this insane war on drugs. That’s a huge turn-around for me.  I used to think we should ban violent video games (we have plenty of data showing it doesn’t affect crime). I have a number of positions that have changed over the years – because I enjoy learning.

So yes, my mind can be changed. But it can’t be changed if you won’t talk about it. I can be swayed by good data. I can be swayed by good logic. It might take some time. If you really feel you need to unfollow me because we disagree – then that is your personal choice. I for one would love to have a reasonable conversation about our disagreement. We may not come to an agreement, but maybe we will better understand our own position. We can try again another day.

Oh – and I know I ramble sometimes. I hope you can like me for who I am. 

Supermoon – not all that special

March 20, 2011 Leave a comment

I might be a little bit late to the party, but I wanted to make sure at least a few places on the internet had the correct science.

The “science” being reported on the “supermoon” makes me really sad sbout science education and science reporting in the United States. If one takes a look at a lunar calendar, you will see the moon has a perigee at this distance about every 2 1/2 years or so. In fact, the last one in December 2008 was also at a full moon. The minor difference is this year the close perigee happens right about the exact time of the full moon, where as the in 2008 it happened about 4 hours after the full moon. The irony is in 2011, the true full moon happened at about 4 pm in the Central Time Zone (when the moon was still hidden) whereas in 2008 the full moon happened about 7:30 pm in the Central Time Zone. That means the perigee happened about 11:30pm in the Central Time Zone. So during that night in 2008, you could actually see the moon be closer than you could in 2011.

Some want to call this the supermoon because it is happening right at the time of the full moon (within the hour the moon is truly “full”).  Well, if you want to go by that, then 1993 doesn’t work either.  In 1993 (which is when most are reporting the last time this happened), the perigee of the moon happened over an hour before the full moon.  Now in 1992, the perigee happened within the hour of the full moon, but it happened in January.  By my math, that is over 19 years ago.  It should also be noted it was even closer than it was this year by 29 km.

Before that, the new moon in 2005 was that close – so it would have been bigger during the day when the moon was visible due to earth shine. In 2003, 2001, 1998, 1994 all had large full moons as well (within 200 km of this year’s supermoon). There is no way that 200 km would be noticeable when the moon is still over 350,000 km away. In 2008, the perigee was actually 10 km closer and would have actually been visible in our time zone when it occurred.

Update:

I checked the calendar for the next few years, and May 6, 2012 the full moon falls right on the perigee, although about 400 km farther than this year.  June 23, 2013, the same thing happens.  August 10, 2014, another full moon perigee and only 300 km farther than this year.  September 28, 2015 is yet another.  November 14, 2016 is a perigee even closer than this year, at 356,511 km (compared to 356,577 this year) .  The perigee precedes the full moon by 2 hours in this instance, but again it is unnoticeable compared to the “true” full moon.  Maybe we can call this one the ultra-moon?

While it is neat to think the moon is a couple percent larger visibly than average and a good 8% or so larger [Update] can appear up to 14% larger (thanks NASA) than when it is farthest away, it is hardly a unique occurrence.  Every full moon perigee is roughly 14% larger than a full moon at apogee, give or take 1%.

One other thing to note: people are often fooled to thinking the moon is very much larger by how it looks when it first rises.  This is simply an optical illusion as explained here.  If you want proof it is an illusion, when the moon is on the horizon, bend over and view it between your legs.  It will appear normal size.  When viewing it normally, our brains fool us because of buildings, trees, etc. in the foreground.

For all of you interested in astronomy, I recommend following Phil Plait or Neil deGrasse Tyson on Twitter, read Phil Plait’s Bad Astronomy blog .  These guys are experts and some of the best personalities in science.