Tento web používá soubory cookie. Dalším používáním webu s tímto souhlasíte.
zaregistrujte se
zapomněli jste heslo?
Cosmos In Brief - Aktualní novinky vesmírného výzkumu v kostce
Máte k tomu co říct? Vložte se do diskuze.
VIRGO --- 19:03:14 31.3.2014
Reflecting on BICEP2 telescope - Technology Org
On Monday, March 17, 2014, collaborators working with the BICEP2 telescope at the South Pole presented
the world with its first direct evidence of primordial gravitational waves and thus of cosmic inflation.
Caltech professor of physics Jamie Bock, co–principal investigator for BICEP2 and the chief architect of
the telescope’s detectors, described the finding as “mind-boggling.”
VIRGO --- 19:00:56 31.3.2014
'Cosmic barometer' could reveal violent events in universe's past
Scientists have developed a way of reading the universe's 'cosmic barometer' to learn more about ancient
violent events in space. Exploding stars, random impacts involving comets and meteorites, and even near
misses between two bodies can create regions of great heat and high pressure.
Researchers from Imperial College London have now developed a method for analysing the pressure experienced
by tiny samples of organic material that may have been ejected from dying stars before making a long journey
through the cosmos. The researchers have investigated a type of aromatic hydrocarbon called dimethylnaphthalene,
which should enable them to identify violent events in the history of the universe.
VIRGO --- 18:51:18 31.3.2014
IMPULSIVE SOLAR FLARE SCRAMBLES RADIO SIGNALS: On Saturday, March 29th, the magnetic canopy of sunspot AR2017 erupted, producing a brief
but intense X1-class solar flare. A flash of extreme UV radiation sent waves of ionization rippling through Earth's upper atmosphere and
disturbed the normal propagation of terrestrial radio transmissions. Radio engineer Stan Nelson of Roswell, NM, was monitoring WWV at
20 MHz when the signal wobbled then disappeared entirely for several minutes.
"The Doppler shift of the WWV signal (the 'wobble' just before the blackout) was nearly 12 Hz, the most I have ever seen," says Nelson.
The flare not only blacked out radio signals, but also produced some radio signals of its own. The explosion above sunspot AR2017 sent
shock waves racing through the sun's atmosphere at speeds as high as 4800 km/s (11 million mph).

VIRGO --- 17:37:20 31.3.2014
Peklo tyhle průtahy..:(

...Of the four scientific instruments to be housed in Webb’s Integrated Science Instrument Module (ISIM),
at least two have suffered setbacks in the last three years.

In 2011, the European Space Agency’s (ESA) near-infrared spectrograph (NIRSpec) unit appeared to be damaged
with several cracks, prompting a lengthy rebuild during which shutter problems continued to delay the team.
The faulty shutter is expected to be swapped out in 2015 between rounds of testing.

In that same time NASA has also been wrestling with malfunctioning cryogenic coolant valves for the mid-infrared
instrument (MIRI). The coolant system is required to ensure the continuous and safe operation of ISIM instruments
in the wildly changing temperature fluctuations of deep space. A poor fitting valve was found leaking, and while
NASA is testing replacements the Space Agency is also considering whether to move forward with alternative valves
procured from a second subcontractor.

As noted in a recent article appearing on Space News, in March of 2013 deputy program manager for JWST Eric Smith
acknowledged, “the cryo-cooler has been a problem for many years.”

SpaceFlight Insider James Webb Space Telescope's woes continue - SpaceFlight Insider

JULIANNE --- 16:38:06 31.3.2014
VIRGO: S Tomem Petráskem jsme se bavili, že perihelium Sedny i 2012 VP113 je v podobné vzdálenosti a oblasti jako afélium Eris a jestli by to mohlo být způsobené dávným průletem hmotného tělesa (hvězdy z otevřené hvězdokupy, kde vzniklo Slunce, nebo hmotné osamocené planety nebo hnědého trpaslíka v o něco větší blízkosti) v takovém místě, aby to dráhu Eris pouze o něco protáhlo a oba extrémnější objekty vystřelilo na mnohem výstřednější dráhu se vzdáleným aféliem. Strašně samozřejmě záleží na počáteční poloze všech objektů; o chlup jinde a mohlo to dopadnout úplně jinak... Jeden další kamarád sestavuje počítačový model sluneční soustavy, ve kterém se dají modelovat i průlety hvězd pod různou rychlostí, úhlem, o různé hmotnosti, v různé vzdálenosti a konkrétní oblasti... Brzy snad uvidíme, jestli tenhle přibližný model dokáže za určitých počátečních podmínek vygenerovat právě tohle :).
VIRGO --- 16:29:29 31.3.2014
Wonderfest 2010: Do We Understand Cosmic Structure? - FORA.tv
VIRGO --- 16:28:24 31.3.2014
2012 VP113: A New Furthest Known Object in Solar System
What is the furthest known object in our Solar System? The new answer is 2012 VP113, an object currently over twice the distance
of Pluto from the Sun. It is a series of discovery images taken with the Dark Energy Camera attached to the NOAO's Blanco 4-meter
Telescope in Chile in 2012 and released last week. The distant object, seen moving on the lower right, is thought to be a dwarf
planet like Pluto. Previously, the furthest known dwarf planet was Sedna, discovered in 2003. Given how little of the sky was
searched, it is likely that as many as 1,000 more objects like 2012 VP113 exist in the outer Solar System. 2012 VP113 is currently
near its closest approach to the Sun, in about 2,000 years it will be over five times further. Some scientists hypothesize that the
reason why objects like Sedna and 2012 VP113 have their present orbits is because they were gravitationally scattered there by a
much larger object - possibly a very distant undiscovered planet.

VIRGO --- 21:19:46 30.3.2014
Future and Cosmos: Is There Any Flab in Nature's Fundamental Blueprint?
An interesting question to consider is whether the universe is built on a kind
of blueprint that has a significant amount of excess or flab. If we look at the
fundamental layout of particles, and find a great deal of excess and waste, this
might perhaps tend to confirm the suspicions of many pessimistic thinkers that
the universe is the daughter of pure blind chance.


VIRGO --- 20:48:38 30.3.2014
OPPOSITION OF MARS: Earth and Mars are converging for a close encounter in April. It's only March,
but the view through backyard telescopes is already superb. Michael A. Phillips of Swift Creek, NC,
took this picture using a 14-inch telescope on March 27: