phoenix comet emerges

No description available.

Category:

Science & Technology

Tags:

• phoenix
• comet
• emerges

[recumbenttrikesnl]

Captain's log: I just lost my hair.

[yarodya]

Охуенно ) Когда-нибудь и мимо нас чё-нибудь пролетит )

[spacekamil2345]

Wow

[SiSePuedo]

another 'dirty snowball'

[qed100]

@TheIronicIdiot More bullshit. Discoveries aren't made by the Majority. And if you have a magnet shoved up your ass, nothing is stopping you from demonstrating it. That's the real scientific currency: demonstration. Theory doesn't become a candidate for truth without it.

[qed100]

@TheIronicIdiot Bullshit. Not knowing everything isn't equal to knowing nothing. More than precisely nothing has been discovered about comets (if nothing were known, we wouldn't even know >of< them). Spectrography was being used a hundred years ago to read the chemicals in cometary tails. Imagine how much progress had been made since then.

[Nomoreidsleft]

@TheIronicIdiot That's called science, an attempt at explaining something using observations. The attempt was not to explain what it is, but what it is doing. Men have some idea what comets are, since probes have been sent to sample the tail material, and in the near future the Rosetta mission is planning to land on one.

[qed100]

@NEVERSTOPJAMIN It didn't fall into the Sun because it approached on a path which carried it slightly off to one side of the Sun. It was the Sun's strong gravity which bent the comet's path and carried it around. Some comets approaching from distant space are on much tighter orbits, and their paths get bent directly into the Sun.

[Nomoreidsleft]

@sploderdotcom Well, given that the escape velocity from the Sun is 618 km/sec, than the comet should be going slightly under that, or else it would keep going and never come back. Solar wind is from 300 km/s to 800km/s. So I guess, the trail could be caused by the drag from the solar wind, because the comet and gas escaping from it is going faster than the Solar wind. The comet is more massive and drag on it is less than drag on the gas.

[sploderdotcom]

@Nomoreidsleft Then that is one friggin fast comet. But what caused it to change direction?... anyways, an idea that could be relating to the speed: when the ice from the comet sublimated into water vapor, the H2O molecules absorbed some of the thermal energy from the sun, thus lowering the temperature of the surrounding particles (evaporative cooling). On Earth, when fluids in the same environment have different temperatures, convection occurs. Do you think the same rules might apply?

[josenf14]

chuck norris comet

[Nomoreidsleft]

@sploderdotcom Hard to tell from a 3 second video. The Strong and Weak force keeps the subatomic particles together to form atoms. If the tail was caused by nuclear decay, that would still be propulsion, since it's in opposite direction to motion. There's not enough gravity difference to cause the tail to run backwards in time relative to the comet. It must be drag from the surrounding solar matter, which means the comet is faster than the Solar wind.