Friday, April 27, 2007
Happy Birthday Hubble
17 years ago, April 25, 1990, mankind made its giant leap. The one that Neil Armstrong promised. The shuttle birthed Hubble into orbit and the grand journey known as Hubble began. Each year at this time, NASA rewards us with a sensational picture and we eat it up the way hungry dogs ingest a treat. Hubble huggers unite. Details on the pic follow. Mahalo.
THE CARINA NEBULA: STAR BIRTH IN THE EXTREME
In celebration of the 17th anniversary of the launch and deployment of
NASA's Hubble Space Telescope, a team of astronomers is releasing one of
the largest panoramic images ever taken with Hubble's cameras. It is a
50-light-year-wide view of the central region of the Carina Nebula where
a maelstrom of star birth - and death - is taking place.
Hubble's view of the nebula shows star birth in a new level of detail.
The fantasy-like landscape of the nebula is sculpted by the action of
outflowing winds and scorching ultraviolet radiation from the monster
stars that inhabit this inferno. In the process, these stars are
shredding the surrounding material that is the last vestige of the giant
cloud from which the stars were born.
The immense nebula contains at least a dozen brilliant stars that are
roughly estimated to be at least 50 to 100 times the mass of our Sun.
The most unique and opulent inhabitant is the star Eta Carinae, at far
left. Eta Carinae is in the final stages of its brief and eruptive
lifespan, as evidenced by two billowing lobes of gas and dust that
presage its upcoming explosion as a titanic supernova.
The fireworks in the Carina region started three million years ago when
the nebula's first generation of newborn stars condensed and ignited in
the middle of a huge cloud of cold molecular hydrogen. Radiation from
these stars carved out an expanding bubble of hot gas. The island-like
clumps of dark clouds scattered across the nebula are nodules of dust
and gas that are resisting being eaten away by photoionization.
The hurricane blast of stellar winds and blistering ultraviolet
radiation within the cavity is now compressing the surrounding walls of
cold hydrogen. This is triggering a second stage of new star formation.
Our Sun and our solar system may have been born inside such a cosmic
crucible 4.6 billion years ago. In looking at the Carina Nebula we are
seeing the genesis of star making as it commonly occurs along the dense
spiral arms of a galaxy.
The immense nebula is an estimated 7,500 light-years away in the
southern constellation Carina the Keel (of the old southern
constellation Argo Navis, the ship of Jason and the Argonauts, from
This image is a mosaic of the Carina Nebula assembled from 48 frames
taken with Hubble Space Telescope's Advanced Camera for Surveys. The
Hubble images were taken in the light of neutral hydrogen. Color
information was added with data taken at the Cerro Tololo Inter-American
Observatory in Chile. Red corresponds to sulfur, green to hydrogen,
and blue to oxygen emission.
Credit for Hubble image: NASA, ESA, N. Smith (University of California,
Berkeley), and The Hubble Heritage Team (STScI/AURA)
Credit for CTIO image: N. Smith (University of California, Berkeley) and
For images, videos, additional information about the Carina Nebula, and
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