Transcript Constellation

Constellation: Niyx
By: Aaron C.
Spiral Galaxy
Diffuse Nebula
Irregular
Galaxy
Planetary Nebula
Elliptical Galaxy
About the
Constellation
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An Constellation is when a group of
stars which form a pattern and are
given a name.
The Constellation formed in the picture
contains stars, galaxys, and nebulas.
This Constellation is highest in the sky
during the winter every year.
Stars
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An Star is self-luminous
celestial body consisting of a
mass of gas held together by its
own gravity in which the energy
generated by nuclear reactions
in the interior is balanced by the
outflow of energy to the
surface, and the inwarddirected gravitational forces are
balanced by the outwarddirected gas and radiation
pressures.
An Binary Star is a stellar
system consisting of two stars
orbiting about a common center
of mass and often appearing as
a single visual or telescopic
object .
In this constellation, and every
single other constellation it has
stars aligned in a shape.
Story Behind Galaxy
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Galaxy is an a star system held together by
gravitational attraction.
The galaxy in the picture is a string of ‘cosmic
pearls' surrounding an Exploding Star
Two decades ago, astronomers spotted one of
the brightest exploding stars in more than 400
years.
This image shows the entire region around the
supernova. The most prominent feature in the
image is a ring with dozens of bright spots.
A shock wave of material unleashed by the
stellar blast is slamming into regions along the
ring's inner regions, heating them up, and
causing them to glow.
The ring, about a light-year across, was
probably shed by the star about 20,000 years
before it exploded.
Astronomers detected the first bright spot in
1997, but now they see dozens of spots around
the ring.
Only Hubble can see the individual bright spots.
In the next few years, the entire ring will be
ablaze as it absorbs the full force of the crash.
The glowing ring is expected to become bright
enough to illuminate the star's surroundings,
providing astronomers with new information on
how the star expelled material before the
explosion.
The pink object in the centre of the ring is
debris from the supernova blast.
The glowing debris is being heated by
radioactive elements, principally titanium 44,
created in the explosion.
The debris will continue to glow for many decades.
Story Behind Nebula
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Starry Night," Vincent van Gogh's famous
painting, is renowned for its bold whorls of light
sweeping across a raging night sky. Although
this image of the heavens came only from the
artist's restless imagination, a new picture from
NASA's Hubble Space Telescope bears
remarkable similarities to the van Gogh work,
complete with never-before-seen spirals of dust
swirling across trillions of miles of interstellar
space. This image, obtained with the Advanced
Camera for Surveys on February 8, 2004, is
Hubble's latest view of an expanding halo of
light around a distant star, named V838
Monochromic (V838 Mon). he illumination of
interstellar dust comes from the red super giant
star at the middle of the image, which gave off a
flashbulb-like pulse of light two years ago. V838
Mon is located about 20,000 light-years away
from Earth in the direction of the constellation
Monocarps, placing the star at the outer edge
of our Milky Way galaxy. Called a light echo,
the expanding illumination of a dusty cloud
around the star has been revealing remarkable
structures ever since the star suddenly
brightened for several weeks in early 2002.
Though Hubble has followed the light echo in
several snapshots, this new image shows swirls
or eddies in the dusty cloud for the first time.
These eddies are probably caused by
turbulence in the dust and gas around the star
as they slowly expand away. The dust and gas
were likely ejected from the star in a previous
explosion, similar to the 2002 event, which
occurred some tens of thousands of years ago.
The surrounding dust remained invisible and
unsuspected until suddenly illuminated by the
brilliant explosion of the central star two years
ago.
Vocabulary
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Binary star - A stellar system consisting of two stars orbiting about a common center of
mass and often appearing as a single visual or telescopic object.
Constellation - An arbitrary formation of stars perceived as a figure or design, especially
one of 88 recognized groups named after characters from classical mythology and various
common animals and objects.
Diffuse nebula - A type of nebula ranging from huge masses presenting relatively high
surface brightness down to faint, milky structures that are detectable only with long
exposures and special filters; may contain both dust and gas or may be purely gaseous.
Elliptical galaxy - A galaxy whose overall shape ranges from a spheroid to an ellipsoid,
without any noticeable structural features.
Irregular galaxy - A galaxy which shows no definite order or shape, except that of a general
flattened appearance.
Nova - A star that suddenly becomes much brighter and then gradually returns to its
original brightness over a period of weeks to years.
Planetary nebula - A nebula, such as the Ring Nebula, consisting of a hot, blue-white,
central star surrounded by an envelope of expanding gas.
Spiral galaxy - A galaxy having a spiral structure.
Star - A self-luminous celestial body consisting of a mass of gas held together by its own
gravity in which the energy generated by nuclear reactions in the interior is balanced by
the outflow of energy to the surface, and the inward-directed gravitational forces are
balanced by the outward-directed gas and radiation pressures.
Sources
http://images.google.com
 http://hubblesite.org/
 http://www.stargazing.net/David/constel/sk
ymapindex.html
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