SPACE
& SCIENCE NEWS: August 2009
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Flashback to Triton
(Aug 26, 2009)
Newly released images commemorate the 20-year anniversary of the Voyager
flyby of Neptune's moon Triton
on Aug. 24, 2009. Triton was the last solid object visited by NASA's
Voyager 2 spacecraft
as it headed toward the edges of our solar system.
Read
more. Source: NASA/JPL |
Shuttle to deliver 'hot and cold'
(Aug 25, 2009)
The US shuttle Discovery
is all set for its latest mission to the International
Space Station. The 13-day flight will deliver science equipment
to the platform, including a new freezer to store biological samples
and a furnace for baking materials. The lab equipment was made in
Europe, which is represented in Discovery's crew by Swede Christer
Fuglesang.
Read
more. Source: BBC |
Landing sites on Europa identified
(Aug 25, 2009)
A rigorous analysis of the jagged terrain of Jupiter's moon Europa
is helping to identify safe landing strips for future missions. Europa
is thought to have an ocean of water beneath its icy shell. The latest
study is the first to use images from the Galileo
spacecraft, which orbited Jupiter from 1995 to 2003, to generate measurements
of Europa's slopes.
Read
more. Source: New Scientist |
Stopwatch found for Solar System
(Aug 24, 2009)
Scientists have found a new way to time events in the early Solar
System. Writing in the journal Science, they describe how aluminium
radioisotopes in chondrules
can now offer precise timing of events 4.5 billion years ago. The
study shows that the rate of decay of isotopes can now be relied upon
to give accurate measures of time for that period.
Read
more. Source: BBC |
Upwards lightning caught on film
(Aug 24, 2009)
Scientists have photographed "upwards lightning", a rarely-seen phenomenon
where electricity from storms flows into the upper atmosphere. During
last year's Tropical Storm Cristobal, lightning reached more than
60km (40 miles) up. Also known as "gigantic jets", these events are
just as powerful as cloud-to-ground lightning bolts.
Read
more. Source: BBC |
Mega black hole twice as big as we thought
(Aug 23, 2009)
The supermassive
black hole at the center of the M87
galaxy may be twice as big as originally thought – possibly
large enough to measure directly. M87 is 55 million light years away.
Its central black hole devours vast amounts of gas and spews out a
huge jet of particles that extends far into intergalactic space.
Read
more. Source: New Scientist |
Saturn moon's mirror-smooth lake 'good
for skipping rocks'
(Aug 21, 2009)
The largest lake on Saturn's moon Titan
is as smooth as a mirror, varying in height by less than 3 millimetres,
a new study shows. The find, based on new radar observations, adds
to a deluge of evidence that the moon's lakes are indeed filled with
liquid, rather than dried mud.
Read
more. Source: New Scientist |
A step closer to 'synthetic life'
(Aug 21, 2009)
In what has been described as a step towards the creation of a synthetic
cell, scientists have created a new "engineered" strain of bacteria.
A team successfully transferred the genome of one type of bacteria
into a yeast cell, modified it, and then transplanted into another
bacterium. This paves the way to the creation of a synthetic organism
– inserting a human-made genome into a bacterial cell.
Read
more. Source: BBC |
Gravity wave detectors home in on their
quarry
(Aug 20, 2009)
For the first time, detectors on Earth have put a meaningful limit
on the strength of gravitational
waves created during the first instants of the universe's existence.
The latest measurement, made jointly by the US-based Laser Interferometer
Gravitational-Wave Observatory (LIGO) and VIRGO, its European counterpart,
was sensitive to gravitational waves at frequencies around 100 hertz.
But they found nothing.
Read
more. Source: New Scientist |
Galaxies demand a stellar recount
(Aug 20, 2009)
For decades, astronomers have thought that the proportion of small
to big stars was fixed. For every star 20 or more times as massive
as the sun, for example, there should be 500 stars with the sun's
mass or less. But now NASA's Galaxy
Evolution Explorer has found proof that small stars come in bigger
bundles than previously believed; for example, in some places in the
cosmos, about 2,000 low-mass stars may form for each massive star.
The little stars were there all along but masked by massive, brighter
stars.
Read
more. Source: GALEX/Caltech |
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