Šaltiniai:
Universe Today – New Hubble Survey Supports Cold Dark Matter in Early Universe
CDM – Cold Dark Matter – šalta tamsioji medžiaga
Naujas tyrimas atskleidžia kaip masyviausios galaktikos formavosi ankstyvoje Visatoje, o jo rezultatai palaiko teoriją, sakančia, kad CDM vaidino didelį vaidmenį. Mokslininkų iš šešių šalių komanda naudojosi NICMOS prietaisu Hubble teleskope, atlikdama iki šiol nuodugniausią tokio [...]
Archive for the ‘Kosmologija’ Category
Naujas Hubble tyrimas palaiko CDM teoriją
Posted in Galaktikos, Kosmologija, tagged cdm, cold dark matter, Galaktikos, hubble, tamsioji materija on 2009/06/24 | Leave a Comment »
Paslaptingas medžiagos telkinys ankstyvojoje Visatoje
Posted in Galaktikos, Kosmologija, tagged banginis, himiko, laimano alfa, lyman-alpha, protogalaktika on 2009/05/04 | Leave a Comment »
Šaltiniai:
EurekAlert.com – Mysterious space blob discovered at cosmic dawn
SkyAndTelescope.com – Introducing “Himiko,” the Primordial Blob
Naudodamiesi daugelio teleskopų duomenimis, astronomai atrado paslaptingą milžinišką objektą, egzistavusį Visatai esant tik 800 mln. metų amžiaus. Tokie objektai vadinami Laimano alfa telkiniais; tai didžiuliai dujų telkiniai, vėliau galintys formuoti galaktikas. Šis pavadintas Himiko.
Todėl, kad tai yra vienas tolimiausių kadanors atrastų [...]
Jautrūs jutikliai registruos Didžiojo sprogimo pėdsakus
Posted in Kosmologija, tagged cmb, didysis sprogimas, mikrobangos, nist, stygos on 2009/05/03 | Leave a Comment »
Šaltinis – EurekAlert.com – NIST super-sensors to measure ’signature’ of inflationary universe
Jutikliai ieškos smulkių kosminio mikrobangų fono (CMB – cosmic microwave background) pokyčių, sukeltų gravitacinių bangų Visatos atsiradimo metu. Manoma, kad tokios bangos paliko smulkių, bet unikalių pėdsakų CMB elektrinio lauko kryptyje (B-mode polarization). Gravitacinės bangos, iki šiol nepatikrinamos matavimais, šiomis dienomis gali būti išmatuotos [...]
New Study Finds Clumps and Streams of Dark Matter in the Milky Way (UT)
Posted in Kosmologija, Paukščių takas, tagged dark matter, milky way, Paukščių takas, tamsioji materija on 2008/08/08 | Leave a Comment »
One of the leading theories for how the universe evolved after the Big Bang is the Cold Dark Matter Theory (CDM). This theory proposes that chilly dark matter moved slowly in the early universe, allowing matter to clump together to form the clusters of galaxies that we see, instead of matter being distributed evenly across [...]
The Cosmic Void: Could we be in the Middle of it? (UT)
Posted in Kosmologija, Supernovos, tagged copernican principle, cosmic void, dark energy, supernova, tamsioji energija, tuštuma on 2008/07/23 | Leave a Comment »
On large scales, the Universe is homogeneous and isotropic. This means that no matter where you are located in the cosmos, give or take the occasional nebula or galactic cluster, the night sky will appear approximately the same. Naturally there is some ‘clumpiness’ in the distribution of the stars and galaxies, but generally the density [...]
Dark Matter is Denser in the Solar System (UT)
Posted in Kosmologija, Saulės sistema, tagged dark matter, Saulės sistema, solar system, tamsioji materija on 2008/06/29 | Leave a Comment »
Dark matter was theorized to exist relatively recently, and we’ve come a long way in understanding what makes up a whopping 23% of our Universe. Our own galaxy is surrounded by a halo of dark matter that adds to its mass. A recent paper on the dark matter closer to home – right here in [...]
Has Dark Energy Always Been Constant? (UT)
Posted in Kosmologija on 2007/10/15 | Leave a Comment »
Dark energy was first discovered nearly a decade ago, when astronomers noticed that distant supernovae were further away than their calculations were expecting. Some mysterious force appears to be accelerating the expansion of the Universe from every point in space. As space expands, more dark energy seems to appear. And although the amount of dark [...]
High energy gamma rays go slower than ‘c’? (UT)
Posted in Galaktikos, Kosmologija on 2007/10/08 | Leave a Comment »
Astronomers studying radiation coming from a distant galaxy found that the high energy gamma rays arrived a few minutes after the lower-energy photons, even though they were emitted at the same time. If true, this result would overturn Einstein’s theory of relativity, which says that all photons should move at the speed of light. Uh [...]
Stranger than black holes (UT)
Posted in Juodosios skylės, Kosmologija on 2007/09/26 | Leave a Comment »
Black holes are already plenty bizarre. Imagine all the mass of several suns compressed down into an object of potentially infinitely small size. But what if you could find an object that’s even stranger: a theoretical “naked singularity”; a black hole spinning so quickly that it lacks an event horizon. A point in space where [...]
