Sunday, March 20, 2011

Super Full Moon

On Saturday March 19 there was a super full moon. This means the moon was the closest to the Earth in almost 20 years. Below is an article I found about the super full moon.

On March 19th, a full Moon of rare size and beauty will rise in the east at sunset. It's a super "perigee moon"--the biggest in almost 20 years.
"The last full Moon so big and close to Earth occurred in March of 1993," says Geoff Chester of the US Naval Observatory in Washington DC. "I'd say it's worth a look."
Full Moons vary in size because of the oval shape of the Moon's orbit. It is an ellipse with one side (perigee) about 50,000 km closer to Earth than the other (apogee). Nearby perigee moons are about 14% bigger and 30% brighter than lesser moons that occur on the apogee side of the Moon's orbit.


 
Above: Perigee moons are as much as 14% wider and 30% brighter than lesser full Moons. "The full Moon of March 19th occurs less than one hour away from perigee--a near-perfect coincidence1 that happens only 18 years or so," adds Chester.
A perigee full Moon brings with it extra-high "perigean tides," but this is nothing to worry about, according to NOAA. In most places, lunar gravity at perigee pulls tide waters only a few centimeters (an inch or so) higher than usual. Local geography can amplify the effect to about 15 centimeters (six inches)--not exactly a great flood.

 
 
The Moon looks extra-big when it is beaming through foreground objects--a.k.a. "the Moon illusion."
Indeed, contrary to some reports circulating the Internet, perigee Moons do not trigger natural disasters. The "super moon" of March 1983, for instance, passed without incident. And an almost-super Moon in Dec. 2008 also proved harmless.
Okay, the Moon is 14% bigger than usual, but can you really tell the difference? It's tricky. There are no rulers floating in the sky to measure lunar diameters. Hanging high overhead with no reference points to provide a sense of scale, one full Moon can seem much like any other.
The best time to look is when the Moon is near the horizon. That is when illusion mixes with reality to produce a truly stunning view. For reasons not fully understood by astronomers or psychologists, low-hanging Moons look unnaturally large when they beam through trees, buildings and other foreground objects. On March 19th, why not let the "Moon illusion" amplify a full Moon that's extra-big to begin with? The swollen orb rising in the east at sunset may seem so nearby, you can almost reach out and touch it.
Don't bother. Even a super perigee Moon is still 356,577 km away. That is, it turns out, a distance of rare beauty.


Thursday, March 17, 2011

Chapter 3

1. I think this quotation means that students and people learn on their own. It doesn't matter how many times something is explained or shown, it is up to them to push themselves to participate, to read, to experiment, or do whatever they are comfortable with to understand the material. In order to learn you have to put yourself out there and be part of the lesson. You can't just sit behind a desk listen to the teacher once and say you learned the material.
2. I have written answers that I thought my teacher would like just because I was scared to speak my mind. I always thought that we were not allowed to disagree with the teacher until I was in the middle of my high school years and I decided to speak up. I feel that it is very common to put an answer down just because they think the teacher wants that. I think this because there are people like me who are afraid to go against the teacher. In reality teachers like when their students form an opinion and speak their mind and a lot of times teachers play opposite sides to start a discussion with the class.
3. I think Mr. Wilson didn't correct the procedure so his students could learn from their mistakes. If he had corrected i right on the spot and stopped the students from continuing on with their plan, then they wouldn't learn, would experience, and wouldn't experiment and the whole lab would be a waste of time.
4. I could bring in rocks, fossils, seeds from trees, flowers, maybe even a cat I have a whole garage of stray cats =)