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The Reasons Why Pluto Is Not A Planet

There are several reasons given by astronomers as to why Pluto is no longer a planet. To better understand it, some background information is essential.

Discovery and Classification
In 1930 Clyde Tombaugh spotted the object over Arizona. It wasn’t entirely unexpected. The movements of the other planets suggested the existence of another one. Even before its discovery, scientists were confident in its existence, which they called Planet X.

The Kuiper Belt
Early on, it was assumed the Solar System consisted of the nine planets, their satellites, comets and the asteroid belt. Over the years, several heavenly bodies were discovered. Eventually scientists discovered the existence of the Kuiper Belt. These objects covered the space from Neptune up to 55 AU (astronomical units).
This discovery is the main reason why Pluto is no longer a planet. Astronomers learned that the planet and its satellite Charon were just one of the 70,000 objects making up this cluster. Their sizes were virtually the same.

Eris
One of those objects was even larger. Named Eris, the object was made of the same material as Pluto. Should it be included as another planet? The problem was tackled at a meeting in Prague in 2006.

Redefining a Planet
At this meeting, astronomers discussed the matter. Some proposed the planets be increased to 12, including Eris and the asteroid Ceres. Other suggested just keeping the status quo. By vote, it was decided that Eris and the other objects in the Kuiper Belt be called dwarf planets.
The reason why Pluto is no longer a planet wasn’t just due to the votes. It was also because planets were redefined. To be called one, it must move in orbit around the Sun. Second, it must have gravity to make a spherical figure. The third is that it must clear the neighborhood.
By this it means the planet must either destroy the smaller objects near it, or push them away. This is the one criterion that Pluto doesn’t meet, so together with Eris they were reclassified as dwarf planets.

Objections
Although the matter has been decided by vote, there are still some objections to it. The most frequent is that cleaning the neighborhood was a concept invented by astronomers.
They point out that it doesn’t apply with other planetary systems in the cosmos. Some believe that the reasons why Pluto is no longer a planet were based on the opinions of astronomers and nothing really solid or scientific.
Others believe that the gravitational pulls should decide if an object is a planet or not. As long as it has enough pull to make a spherical figure, it should be classified as a planet. Even those who believe that the demotion was right don’t like the term dwarf planet. Given that it’s not a planet but an object in the Kuiper Belt, it makes no sense to refer to it as one.
The reasons and arguments for why Pluto is no longer a planet will probably go on for years. But as space enthusiasts point out, it hardly diminishes the fascination that people have with this tiny and remote object.

Title is linked to original article – Photo is linked to where photograph was found.
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Thanksgiving Spirit in Afghanistan

I found this great photo today.

BAGRAM AIRFIELD, Afghanistan — An all-terrain vehicle decorated as a combat turkey drives by the flightline as part of a Thanksgiving Day parade Nov. 26, 2009. The combat turkey float was named the first place winner in the judging portion of the parade. It was created by the joint 455th Contingency Aeromedical Staging Facility and Task Force Mountain Warrior team. (U.S. Air Force photo/Staff Sgt. J.G. Buzanowski)

Vintage Christmas Cards Traditional Holiday Art

Here is some of the best vintage Christmas artwork that I came across. There are links to many that will take you to the artwork. If you don’t see a link just click on the image and that will take you there.

Enjoy ….

Vintage Christmas - Girl Baking Cookies card
Vintage Christmas – Girl Baking Cookies by vintagegiftmall

Vintage Christmas, No 11 print

This next one was simply too cute to not include – Is it Christmas Yet ?


Vintage Swedish Jul Bok Christmas Poster print

Vintage Christmas Card Card card
Vintage Christmas Card Card by SweetRascal

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Toshiba Launching 3D TV – Glasses Not Required

Just heard this on Bloomberg Stock Market News.
Toshiba is launching a 3D television that does not require the viewer to wear glasses and I believe it will be the world’s first. Toshiba will produce two versions of their “Glass-less REGZA 3D TV”; one will be a 20 inch model and a smaller 12 inch one.
The main complaint that many people have had about the prospect of 3D television viewing is the need to wear special glasses in order to do it. This is not practical, and if you already wear prescription glasses your viewing experience is likely to be pretty poor unless you can get your hands on prescription 3D glasses.
Looks like the invention of these prescription 3D glasses will no longer be necessary.  If you simply must view television in 3D Toshiba has proved that the funky glasses are no longer needed. A sort of Lasix surgery for the viewer or the television, I am not quite sure which. Perhaps the next new television product will be made with a screen that makes it unnecessary for the individual who already wears prescription glasses to be bothered with the hassle of putting them on. Get your television with your personal prescription glass but what happens when your prescription changes? Why not have a screen that you can adjust to match your prescription, oh that won’t work unless you are the only one watching the television. In today’s day of technology it seems like that is the case for most people anyway. With Toshiba’s new product you need to view the screen at a distance of 90 cm for the larger TV and 65 cm for the smaller 12 inch one, which means you need to be up pretty close to the set. You have to sit in just the right position, or angle in order to allow the brain to interpret the 3D effects.
Masaaki Oosami, the president of Toshiba Visual Products told the BBC that it was “more natural to watch TV without glasses”.
Both television sets will be available in Japan in December at a cost of $1,450 for the smaller one and around double that for the larger one. We don’t know yet when they will be available to the rest of the world or what they will cost.