What about flame of candle under zero gravity?

Exactly the above picture shows the flame of candle in microgravity state. The part that looks in the middle is the core, the blue one around it is the flame.

This experiment was done by NASA, and the above picture is also based on NASA.

The commentary on what kind of reason is such a state and the actual movie are as follows.
Candle Flames in Microgravity Home Page

The principle of why a blue flame stays around is written on the following page.

CFM introduction

Normally, ascending air currents are generated, oxygen is always provided from the bottom of the candle flame and continues to burn, but in the microgravity state this flow of air current does not occur. So, it is a hemispherical shape, not a commonly seen fire in the vertical direction. In this case, the rate at which oxygen is provided from the surroundings decreases markedly, and the reaction rate decreases. As a result, the temperature of the flame decreases and it becomes blue.

The actual movie is below. I do not quite understand what it is, but I understand only that it turns blue.

CFM on Mir (1996; 1: 09)

The experiment was done in 1996 at the space station meal (now no longer). The voice that the astronauts during the experiment are speaking is also recorded, so you can taste a strange presence.

Why does the candle flame shine? What principle is burning? You can understand Michael Faraday 's "Science of candles" about such as. On the following page you can read the full Japanese translation by Creative Commons License.

Science of candle
Author: Michael Faraday
Translation: Hiroo Yamagata

This is a thing that Faraday who celebrated the 70th recorded the appearance of the sixth consecutive Christmas lecture "The Chemical History of a Candle" at the Royal Institute of London on 1861 Christmas holiday. It seems he came to ask from the royal aristocrat to the children of the general public.

Furthermore, there is such a thing in Faraday's word.

Yahoo! Chiebuku - "About Faraday's lady who dismissed the lady" ...

A certain lady asked when Faraday was playing with batteries all the while.
"What's going on doing trivial things not even such a role?"
Faraday said that.
"What kind of role did a baby just born help?"

It is a perfect word for students who say that studying is useless.

2006/10/12 21:47 Addendum
There is a thing that has arrived as many tsukkami by e-mail, "Because the temperature is low, it is funny that the blue flame is funny, the blue flame should be hot." So, it is explained in a little more detail on the following page.

The wonderful lie of the universe, indeed - Living in the universe / making it (3) -

When the concentrations of substances vary from place to place, the concentration of substances becomes uniform over time. This phenomenon is called "diffusion". This "spreading" keeps the candle burning as oxygen and oxygen are supplied gradually. However, compared to the feed rate due to convection in the case of gravity on the ground, the supply rate of oxygen due to diffusion in zero gravity is small, so the temperature of the flame is lower than the ground and the color of the flame also becomes dark blue .

In other words, it means that common sense on the earth does not pass. Because it was written in the above page in detail, initially it was expected that the flame of the candle will not continue to burn because convection does not occur initially, but in reality there are cases where it continues to burn with diffusion phenomenon Because it was. It seems that the color of the flame is also blue, but it is colder than the ground.