Group U The Sun


What is the sun?
The Sun is the star at the center of the Solar System and
is by far the most important source of energy for life on Earth.
It is a nearly perfect sphere of hot plasma.
Most of the scientists think that the Sun formed from a giant.
A massive rotating cloud of gas known as the solar nebula.
Gravity drew dust and gas together to create the solar system.
The Sun formed first and then the planets.


The Sun is roughly middle aged and has not changed dramatically for over four billion years,
and will remain fairly stable for more than another five billion years!!!.
The Sun will undergo severe changes and become a red giant.
It is calculated that the Sun will become sufficiently large to engulf the current orbits
of Mercury, Venus, and possibly Earth :o

Sunlight is a portion of the electromagnetic radiation given off by the Sun,
in particular infrared, visible, and ultraviolet light. On Earth, sunlight is filtered through
Earth's atmosphere, and is obvious as daylight when the Sun is above the horizon.


It is a common misconception that the Sun is yellow, or orange or even red.
However, the Sun is essentially all colors mixed together, which appear to our eyes as white.
This is easy to see in pictures taken from space.
From our perspective it does look a little yellow, especially after sunrise or shortly before sunset,
but if you could travel into space and look at the Sun without going blind, you'd find that it’s actually white, and not yellow.


During the day we can see the Sun, but why can't we see it at night?
That is because the earth rotates all the time, but the sun doesn't,
so when the earth rotates, there will be one point in which we could not
be able to see the Sun, and the moon will appear.
We will be able to see the sun once the earth has rotated to where the sun is.

sun_moon_tattoo_by_faerone.jpg sun__moon_stencil_by_pasqi-d4qf01f.jpg
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