Hi there! My name is Javier, and this blog is dedicated to all of you who are in love with the sky and science. I will be posting interesting scientific information and materials that may come in handy for school projects. If you're specifically passionate about Astronomy, I hope this blog pleases you.
jueves, 17 de abril de 2014
precious moon put a red dress on last night. It was such
a marvelous event that I
couldn't resist taking pictures!
you're one of those asking why the moon dyed its surface red, stay
here with me.
happened yesterday is
called a lunar eclipse.
A lunar eclipse happens
when the Moon orbits behind the Earth and enters its umbra, which is
the shadow of the Earth caused by the Sun. This can occur provided that the
Sun, the Earth and the Moon become aligned
if it's an eclipse, why are we still able to see the Moon? Well, it
is all due to our atmosphere. First
of all, the light coming from the Sun has to go through a thick layer
of gases where it meets all sorts of molecules and particles. This process causes the refraction of
sunlight, and consequently, it gets scattered. Light scattering is another physical
phenomenon in which light separates and turns into many other different wavelengths (red,
orange, yellow... you know, the rainbow!*).
Our atmosphere prefers
red light (longer wavelength) to be scattered because of the dust and the
gases present in it, and that's why we see our moon red in lunar eclipse. It's a similar occurrence to that of the red colouring of the sky during a sunset.
*Fun fact: Did you notice that there is no pink in the rainbow? That's because pink light doesn't exist. For more information, check out this video: