EL CIELO DE ENERO 2011 (HEMISFERIO SUR). JANUARY NIGHTS SKIES 2011 (SOUTHERN HEMISPHERE)


Uploaded by fernandobeltranp on 28.12.2010

Transcript:
In January night is not until quite late to be summer. Let's start looking at the sky to the north.
Dominates the northern sky in the constellation of Orion
It is an unmistakable constellation welcomes the summer season
Is very high in the sky and can be recognized with four stars
in a rectangle and three stars in the center line
These three stars form the belt of Orion.
The star at the bottom right is a red star
one of the few stars that can recognize its color to the naked eye
It´s Betelgeuse, a giant star,
hundreds of times greater than our Sun
Betelgeuse's name comes from Arabic and means "the armpit of the giant. "
To describe the location of the star in the drawing of the old constellation of Orion
You may wonder why the armpit of Orion are in the bottom of the constellation , not the top
The reason is that the constellation was named in the northern hemisphere
and southern hemisphere constellation we see upside down
So the poor Orion remains an uncomfortable position with his legs over his head
In the opposite diagonal is another bright star Betelgeuse,
with a bluish-white, known as Rigel
It is a very bright star - also a big - though not as big as Betelgeuse.
Light is 775 years away from us
We could say that the light we see left the star Rigel in 1230 of the Earth, in the Middle Ages
Unlike our Sun, which converts hydrogen into helium
Rigel is turning helium into carbon and oxygen
Stars that use this type of fuel are at an advanced stage of their life cycle
The surface of the star has a temperature of 11,000 degrees, twice the sun
This constellation hidden from human eyes
a wonderful treasure that shows us today, thanks to digital technology
like a beautiful show of light and color formed by interstellar dust and gas
illuminated by nearby myriads of stars, reveal their chemical composition
One of the many good things about Orion's watch that
can be used as a guide to find other stars and star clusters in the sky
We will extend a line through the three stars of Orion's belt to the left
that is, to the west, and we have another bright star, a star called Aldebaran
That is the brightest star in the constellation Taurus the Bull
Giant star Aldebaran is a reddish-orange
His color is not as easy to appreciate as Betelgeuse,
but is distinguished from other white stars around it
Is located 65 light years away
and is about 40 times larger and 350 times
more luminous than the Sun
Aldebaran is in a group of stars forming an inverted V in the sky
Locate the V is the easiest way to find the constellation of Taurus the bull
It is interesting that the group of stars in the form of V
is located much farther than Aldebaran
Aldebaran is actually closer to us than the stars of that group
These stars, in turn, form part of a larger group called the Hyades
150 light years away from us
If we extend an imaginary line a little further west
we come to another compact group of stars called the Pleiades,
the most famous star cluster
This group of stars provides a very good test for the eyes
Most people see six stars, but they have very good vision can see seventh, very weak
There are many legends and stories associated with these stars
According to Greek mythology, are the Seven Sisters
According to a legend of the Aborigines of Australia one of the seven sisters fell in love
with two men, spirits of Earth and stood back
while the other six returned to heaven
The sister and the two men became spirits
and were the parents and creators of all that is on Earth
Through a telescope can see more of seven stars - hundreds of them
The photographs in this group show that there are pieces of gas and dust
surrounding many of the stars in the cluster
Astronomers at first thought they were the remains of gas and dust
from the formation of the Pleiades
However, when astronomers measured its brightness, and compared with that of the stars
they found that the gas and dust moving in a different direction
So there is no connection between them
It seems that the stars have come across this cloud of gas and dust and are going through
Now we will extend an imaginary line from Orion's belt in the opposite direction
First, it spread to the left, Aldebaran, reaching the Pleiades
Now we will extend to the right, eastward and upward to reach Sirius
the brightest star in the sky
Sirius is the alpha star of the constellation Canis Major, the Big Dog
One of the interesting things that can be said about Sirius
is that it has a very faint companion star by astronomers called Sirius B
They consider a white dwarf, a star the size of Earth,
but at the same time with the sun's mass
This star is very difficult to detect because the brightness of the star,
Sirius A
The first time could be observed was due to the optician
Alvan Clark of the United States in 1863
When Clark was testing a new telescope was built, it went to Sirius
and realized that there was a faint object near the bright star
A Sirius B takes 50 years to turn around Sirius A. In 1994 they were at their closest point
and will be in 2019 when they are further away, so it will be easier to distinguish
So the next few years will be better to see Sirius B
We will direct the light toward the southern sky
Very high are the Magellanic Clouds, two fuzzy puffs
Two galaxies are very close, the greatest tag is only about 160,000 light years away
and reduced to 210,000 light years
In the Large Magellanic Cloud has discovered the most massive star
more luminous than known, a hypergiant blue, with 300 times the mass of the Sun
and 40,000 degrees of temperature on its surface (the Sun is only 6,000 degrees)
Looking to the east runs the Milky Way that serves as backdrop
for the constellations of the stern, the sail and the keel (Carina also called set)
and the Southern Cross
The Southern Cross is in the southeast
The way of recognizing this constellation is that there are two pointer stars
Alpha and Beta in the constellation Centaurus, directly below
It is important to find Alpha and Beta Centauri
because the Southern Cross can be easily confused with another group of stars
slightly higher in the sky known as the False Cross
Let's use the Southern Cross as a guide
Will form an imaginary line passing through the two stars to the east of the Cross
and continued until reaching the second brightest star in the sky, Canopus the Carina´s alpha
EVENTS JANUARY 2011 SOUTHERN HEMISPHERE
Looking north we see the passage of the moon, planets and the Sun through the ecliptic
which is the imaginary line where eclipses occur
Stresses on January 30 before sunrise the declining image of the moon with Venus in phase
If the sky is very dark will appreciate against the backdrop of the Milky Way
Saturn rises in the eastern horizon at dawn and day 25 will be accompanied by the moon
moon in their spacewalk. Rings and are visible with a small telescope
The New Moon occurs the 4 day , allowing a better view of deep sky objects
On January 4 will be a partial solar eclipse visible only from Europe
North Africa and Central Asia
On the night of January 4 will result in the maximum of the quadrants and
being the New Moon phase will allow a spectacular view over 120 meteors per hour
people better enjoy the Northern Hemisphere
because the radiant is between Polaris and the brilliant Arthur of the constellation Bootes
This video is for the last year Quadrantids shot from the Scottish highlands