4/15/2005:
Intermediate
Word: faux
pas - (a) feint
(b) gaffe (c) cheap
imitation (d)
frightening development
Difficult Word: -
subaltern (a) acolyte (b) British non-commissioned
officer (c) between lieutenant and captain (d) shelf underneath an altar
,

Distant
"Super-Starburst" Galaxies Hide Active Black Holes -
SpaceDaily Left:
These radio
emission contours overlay false colour images taken with the Hubble
Space Telescope's Advanced Camera for Surveys. Each image is approx. 2.6
arcsec on a side and the radio and X-ray peaks are shown in red and blue
respectively. In each case the X-ray emission is thought to come from an
active supermassive back hole concealed within a dusty torus.
J123622+621629 (top) and J123621+621109 (right), at redshifts of 2.4 and
1 respectively (70 and 20 billion light years distant), have extended
radio emission typical of starbursts and are associated with distorted,
probably merging optical galaxies. The
team focused on galaxies so far away that their radiation took more than
six billion years to reach us. The galaxies are seen as they were when
they were less than half the age that the Universe is today. "The
more remote starburst galaxies, so called because of their high rate of
star formation, typically produce 1,000 or more solar masses of stars
per year - at least 50 times more than the most active star-forming
galaxies in the nearby Universe," said Dr. Richards. "Each
distant starburst region is tens of thousands of light years across,
equivalent to about the inner quarter of the Milky Way - also vastly
larger than any such regions found in our part of the Universe. We
concluded that, not only were these young galaxies undergoing much more
violent and extended star formation than we see today, but they were
simultaneously feeding active, supermassive black holes responsible for
the X-ray emission." |
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"Earths" Galore Await Discovery - SpaceDaily Recent theoretical work by Barrie Jones, Nick Sleep, and David Underwood at the Open University in Milton Keynes indicates that as many as half of the known systems could be harbouring habitable "Earths" today. Unfortunately, existing telescopes are not powerful enough to see these relatively small, distant "Earths". "We were particularly interested in the possible survival of "Earths" in the habitable zone," said Professor Jones. "This is often called the 'Goldilocks zone,' where the temperature of an 'Earth' is just right for water to be liquid at its surface. If liquid water can exist, so could life as we know it." |
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LISA And The Search For Gravity Waves - SpaceDaily Left: "LISA (Laser Interferometric Space Antenna) (illustrated) is expected to provide the best chance of success in the search for the exciting, low frequency gravity waves," said Professor Cruise. "However, the mission is one of the most complex, technological challenges ever undertaken." In the case of LISA, three spacecraft will fly in formation, 5 million kilometres apart. Laser beams travelling between them will measure the changes in separation caused by gravity waves with a precision of about 10 picometres (one hundred thousandth of a millionth of a metre). The precision required is 1,000 times more demanding than has ever been achieved in space before. |
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