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No matter how strange it may sound, but it is the Sun that is the main "culprit" of the aurora.
High-speed solar wind particles collide with atoms in the Earth's upper atmosphere. The effect is observed at high latitudes.
And the color depends on which particle and at what height the plasma from the Sun collides. If with oxygen at an altitude of 100 km - green.  ...
Do you remember that white in physics is the sum of all colors? And black is the complete absence of color. A prism, due to its structure, refracts a white beam inside itself and gives a color spectrum at the output.
2022-09-30 20:46:07 +0000 UTC View Post
I am very depressed after finishing my master's degree.
I broke the usual pattern that on September 1st I have to go to study for the 18th year.
And I'm sitting in some kind of emotional hole, I don't understand what to do and how, until I go to PhD.
+ It also presses that all my classmates in Moscow are already studying, and I, like a cur here, have not yet entered anywhere...
The force of friction is the simplest school topic known to everyone. Everything seems to be clear, nothing so unusual. But it's actually a very interesting and important thing.
If it weren't for friction, you wouldn't be able to walk, sit, wear clothes, hold hands with anyone.
Visually, it works very simply. interferes with the movement of the b...
2022-09-18 22:07:42 +0000 UTC View Post
Oh my goodness, as long I waited such background. Just white walls behind me, nothing more
2022-09-13 11:51:21 +0000 UTC View Post
There is such a concept in cosmology - the observable Universe.
It is the part of the Universe we are theoretically able to study, see, feel, touch and all that๐
But also along with this concept there is one more thing - the metagalaxy
This is that part of the Universe relative to us, earthlings , which is really available to us for study ...
2022-09-09 17:12:26 +0000 UTC View Post
The rings of the planets are dust, gas and icings rotating at high speed.
All gas planets of the solar system have rings (Jupiter, Saturn, Uranus, Neptune). It is also supposed that the Earth also had rings, but not for long.
The most common hypothesis for the formation of rings is the destruction of the satellites of the planets, there is also a hypothesis that this is...
2022-08-31 20:46:57 +0000 UTC View Post
What is a nebula?
This is the remnant of matter after the death of a star - a supernova explosion. Part of the particles is carried away at great speed from the place of the explosion, while the rest remains. And yes, nebulae are not colored. It's just an image that was colored for epicness)
On the picture - Crab nebula
I watched such a beautiful sunset in Moscow yesterday. Every time I admire like a child.
True, from the point of view of physics, this beautiful phenomenon sounds quite simple and unattractive)
Sunset is a refracted visible light from the Sun in a certain way. At different hours of the day, the sun's rays travel different distances and during the day you will not s...
2022-08-15 18:16:31 +0000 UTC View Post
The light from the stars that you see in the starry sky has only now reached the Earth. Most likely all these stars have long been dead. This happens because the light from these stars travels a huge distance + the Universe is expanding all the time.
And it turns out a delay of several billion years. Which just corresponds to the age of a typical star.<...
2022-08-05 19:57:08 +0000 UTC View Post
I can't upload any video here. Does anyone know what could be the reason?
2022-07-29 09:42:48 +0000 UTC View Post