
Romanian: 
Responsabila de culoarea albastra a cerului
este atmosfera pamantului.Care sparge
lumina alba ce vine de a soare, in culorile sale.
Pe care apoi le imprastie in toate directiile,
astfel o singura raza de lumina alba
are in componenta sa culori ca albastru, galben, rosu,
remarcam acest lucru de fiecare data
cand iluminam sau privim un disc optic.
Vedem ca suprafata lui este colorata
tocmai pentru ca lumina alba a fost sparta in
culorile sale componente.
La fel se intampla si cu lumina alba a soarelui
cand aceasta intra in atmosfera
pentru ca se loveste de moleculele de aer.
Exista insa o diferenta cruciala si anume culoarea albastra
 
este imprastiata cel mai puternic.
De ce ?
Pentru ca lungimea de unda a culorii albastre
este cea mai mica.
Intr-un fel aceasta este cea mai sensibila la structurile microscopice ale atmosferei.
 
Putem verifica acest lucru printr-un experiment de bucatarie,

English: 
Responsible for the blue color of the sky is the
atmosphere of the Earth
which breaks the white light that comes form the Sun into its colors.
It then spreads it into all directions.
A single ray of white light is composed out of colors such as
blue, yellow, red. We can observe this each time we illuminate or look at
an optical disc. We can see that its surface is colored
because the white light
got broken into the colors it is composed of.
The same thing happens to the white light of the Sun
when it enters the atmosphere
because it hits the air molecules.
There is, however, a crucial difference: the color blue
is spread over the most. But why is this?
Because the wavelength of the color blue is the
smallest.
It is somehow the most sensible
to the microscopic structures of the atmosphere.
We can verify this by

English: 
doing a kitchen experiment.
Let's pour some milk into a clean vessel.
After we homogenize the milk
we light the vessel with a flashlight
The small molecular structures of the milk
will break the white light into its colors.
And they will spread in the most efficient way
the color blue. In a short while
the whole bowl will shine with a blue tint.
Interesting.
If we look at the flashlight's ray from the opposite side
we will see that it is yellow
or a bit reddish.
Why? Well, the colors yellow and red
have a bigger wavelength.
They will be less perturbed by milk molecules
and they will go straight forward
The other colors from the ray get lost due to dispersal.
The same thing happens
with the Sun at sunset.

Romanian: 
astfel sa turnam putin lapte intr-un vas curat umplut cu apa.
 
Dupa ce omogenizam laptele,
iluminam vasul cu o lanterna.
Micile structuri moleculare ale laptelui
vor sparge lumina alba in culorile sale,
si vor  imprastia cel mai eficient culoarea albastra.
In scurt timp intregul vas va straluci putin in albastru.
 
Interesant,
daca privim raza de lanterna in partea opusa,
vom vedea ca ea este galbena sau putin rosiatica.
De ce?
Ei bine, culorile galben si rosu au o lungime de unda mai mare.
 
Ele vor fi perturbate mai putin de moleculele de lapte si vor merge drept inainte.
 
Celelalte culori din raza se pierd, datorita imprastierii.
 
La fel si intampla si cu Soarele la apus.

Romanian: 
Din lumina lui, aproape toata culoarea albastra a fost imprastiata,
ramanand dominante doar culorile galben si rosu.
De aceea la apus Soarele se vede rosiatic.
Pe celelalte planete culoarea depinde de compozitia atmosferei.
Pe Venus, de exemplu, atmosfera este foarte densa,
 
de aceea cerul capata o culoare portocalie, asa cum se vede pe  imaginile sondei Venera.
 
Pe de alta parte, pe Marte, apusurile pot fi cateodata albastre.
 
Pe Luna, nu exista atmosfera, de aceea, cerul este de un negru intens, atunci cand nu se vede Soarele pe cer.
 
 

English: 
From its light almost all the blue has been scattered.
Only the yellow and red colors remain dominant.
That is why at sunset the Sun can be seen as reddish.
On the other planets the color depends on
the composition of the atmosphere.
On Venus, for example, the atmosphere is very dense.
That is why the sky has an orange color
as you can see on the probe's images.
On the other hand on Mars
sunsets can sometimes be blue.
On the Moon there is no atmosphere.
Which is why the sky is intense black
when you can't see the Sun in the sky.
