Chinese astronauts light candle with match on Tiangong space station to show flame behavior

No translation was available.

Credit: China Central Television

[joe.scoket]

On Earth, due to gravity, when a candle burns, hot air rises and cold air falls, so the flame takes on a cone shape. In space, due to zero gravity, the gas spreads in all directions, so the flame takes on a spherical shape.

[月隐谷]

This is a Chinese astronaut giving a lesson to the children of the earth in space, but it seems that we adults find it more interesting.😂

[thatotherandrew_]

The number of armchair scientists here who seemingly believe they have a better understanding of physics than those involved in conducting this experiment is hilarious

[猫劭庭]

This is a lesson about space taught by astronauts to Chinese primary school students. There are no deep questions but it is very interesting. I don't know what you are arguing about.

[geektechpow]

Man I can't praise more for those video. This is what will sparkle and ignite the flame of science to young generation.

[siroyiryuu]

The biggest drawback of the internet is that it gives ignorant and foolish people the opportunity to irresponsibly express their delusions.

[Nagas_Arcana]

"Have you ever seen fire in zero gravity... it's beautiful" - Laurence Fishburne, Event Horizon

[rrmackay]

I love this, every nation, every new astronaut marvels at the same things, simple physics experiments, I fully expect to see them playing with water bubbles next. They did the water bubbles first 1 year ago.

[pctong]

Meanwhile, school kids in the US are still deciding whether they should identify themselves as a boy or a girl

[ribvicky]

They made their own space station and they are on it. This is the biggest thing!!

[urcompnioncube]

looking at the comments its only Americans that are offended that Chinese scientists make classroom videos for Chinese kids in grade school. How dare the Chinese stimulate STEM >:(

[fgbae]

Love all the china hating comments.
They can do that on the Tiangong space station without safety issues, sinces its technologically way WAY more advanced than the ISS.
I love that the idea that some random commentators are like thats so dangerous" without knowing shit about this. You really think they would do this if there was any risk associated at all? You really think they would do that and risk the space station, just because... idk?

[mr.social.official]

Chinese astronauts are very cool! thank u for the video!

[luis-sophus-]

Chinese people making better space vids than NASA 😂

[ChimkenRiceNuggy]

Since there is no up and down from space. The flame went in every direction which formed a spherical shape. That's crazy to know.

[joeldriver-sprg]

Man all of the flat earthers and people who think space travel is fake are going to have a tough time with this one. They'll just have to blurt out "That's just CGI!" like they always do.

[edidervishi]

Chinese scientists are willing to show these interesting experiments to Chinese children. At the same time, American adults are educating their children to consider gender issues

[thomasjunk]

Pretty neat, never seen this before. The candle almost suffocates in its own exhaust.

[JohnHoranzy]

In zero gravity, there is no convection to drive combustion so the gasses have to diffuse through the wall of flame. Early Apollo designs used 100% Oxygen in the capsule with the understanding that lack of convection would limit any fire. But they still used 100% Oxygen during ground tests with gravity and tragically killed the crew of Apollo 1.

[NotSure]

Hot air doesn't rise in microgravity. That's why the flame is a sphere.