Download Recomendación de una estrategia

NASA ASTRONOMY
PHOTOS
By Daniel García Guirao 1ºB
Index

Comet ISON

An ancient stream bank in Mars

The Goat Aurora

The Helix Nebula
Comet ISON
Introducing Comet ISON
Image Credit & Copyright: Ligustri Rolando
Could this spot become one of the brightest comets ever? It's
possible. It could be destroyed when it gets coloser to the sun,
or just brithten weaker. This is called C/2012 S1 (ISON) and it
could develop a spectacular tail or approach the brightness of
the full Moon toward the end of 2013.
The comet, discovered just over a week ago from Russia by Vitali
Nevski (Belarus) and Artyom Novichonok (Russia), is currently
falling toward the Sun from between the orbits of Jupiter and
Saturn.
If the comet survives it will pass nearest the Earth in late 2013
December.
Personal opinion 1
The fact that this comet is approaching our planet is
really powerful, and I'd wish to see it when it
passes near to us on 2013 December. If the comet
will be close to the brightness of the full Moon, it'll
be an awesome spectacle.
An ancient stream bank
An Ancient Stream Bank on Mars
Image Credit: NASA, JPL-Caltech, MSSS


Fresh evidence of an ancient stream has been found on
Mars. The robotic rover Curiosity has run across unusual
surface features that carry a strong resemblance to stream
banks on Earth.
Visible in the above image, for example, is a small
overhanging rock ledge that was probably created by water
erosion.
Personal opinion 2
There is a stream bank and erosioned rocks in Mars,
so water must have existed there. This photo that
Curiosity rover has taken is very useful for us,
because we can use the information gathered in
Mars to try to have an idea of what we're
surrounded of.
A Goat Aurora
Goat Aurora Over Greenland
Image Credit & Copyright: Juan Carlos Casado (TWAN)


Sometimes it's hard to believe what you see in the sky. During
the Shelios Expedition to Greenland in late August, even veteran
sky enthusiasts saw auroras so colorful, so fast changing, and so
unusual in form that they could remember nothing like it.
Some auroras evolve to seem what looks to be the head of a
goat (shown above). Even without the aurora, the sky would be
notable for the arching band of our Milky Way Galaxy and the
interesting field of stars, nebulas, and galaxies.
Personal opinion 3
An aurora with the form of a goat's head. It's true that
veterans and novices are both impressed with
images like this. Auroras are the most beautiful
spectacle in the sky, and you can also see in the
photo the Andromeda galaxy and some
constellations of the Milky Way.
THE HELIX NEBULA
NGC 7293: The Helix Nebula
Image Credit & Copyright: Martin Pugh


A mere seven hundred light years from Earth, in the
constellation Aquarius, a star like the Sun is dying. Its last few
thousand years have produced the Helix Nebula (NGC 7293), a well
studied and nearby example of a Planetary Nebula, typical of this
final phase of stellar evolution. A total of 58 hours of exposure time
have gone in to creating this deep view of the nebula.
The white dot at the Helix's center is this Planetary Nebula's hot,
central star.
Personal opinion 4
Now that I've learnt about nebulas and stars' life I can
get and idea of why a star like the Sun has made
this amazing effect on the vacuum.
It's hard to believe that currently this star is throwing
hot gas and dust to space.
Someday this elements will be part of planets, dwarf
planets, satellites, comets or just simple asteroids.
Bibliography
http://apod.nasa.gov/apod/archivepix.html