Space Fellowship 29 Aug 2014, 12:59 UTC This new NASA/ESA Hubble Space Telescope image shows a variety of intriguing cosmic phenomena. Surrounded by bright stars, towards the upper middle of the frame we see a small young stellar object (YSO) known as SSTC2D J033038.2+303212. Located in the constellation of Perseus, this star is in the early stages of its life and is still forming into a fully-grown star. In this view from Hubble’s Advanced Camera for Surveys(ACS) it appears to have a murky chimney of material emanating ou [...]
One Universe at a Time 29 Aug 2014, 11:00 UTC One of the big successes of the big bang model is its prediction of elemental abundances. The first elements were produced in the early moments of the universe through a process known as baryogenesis. This process is very complex, and it is highly dependent upon the temperature and density of the universe at that time. Change the temperature a bit one way or the other, and the initial ratio of primordial elements would be different. Knowing the temperature of the early universe, we can predict the amount of hydrogen vs. helium produced by the big bang, and this agrees fairly well with observation.But the model also predicts that trace amounts of lithium should also be produced. According to the theory, for every 10 billion hydrogen atoms the big bang produced, it should also have produced a lithium atom. That may seem like a tiny amount, but it is much higher than we observe in the early universe. In other words, the model predicts much more lithium in the early universe than we observe, and this is known as the “lithium problem.”There have been a couple of proposed solutions to this problem. One is that we simply aren’t seeing the amount ...
Starts With a Bang! 29 Aug 2014, 01:32 UTC What every middle-to-high schooler should know.Continue reading on Medium »
Universe Today 28 Aug 2014, 21:36 UTC Never seen Neptune? Now is a good time to try, as the outermost ice giant world reaches opposition this weekend at 14:00 Universal Time (UT) or 10:00 AM EDT on Friday, August 29th. This means that the distant world lies “opposite” to the Sun as seen from our Earthly perspective and rises to the east […] The planet Neptune as seen by the Voyager 2 spacecraft during its 1989 flyby. Credit: NASA/JPL.Never seen Neptune? Now is a good time to try, as the outermost ice giant world reaches opposition this weekend at 14:00 Universal Time (UT) or 10:00 AM EDT on Friday, August 29th. This means that the distant world lies “opposite” to the Sun as seen from our Earthly perspective and rises to the east as the Sun sets to the west, riding high in the sky across the local meridian near midnight.(...)Read the rest of Observing Neptune: A Guide to the 2014 Opposition Season (767 words) © David Dickinson for Universe Today, 2014. |Permalink |No comment | Post tags: 2014 astronomy, discovery of neptune, neptune 2014, neptune opposition, observing neptune, observing triton Feed enhanced by Better Feed from Ozh
Discovery News - Space News 28 Aug 2014, 20:54 UTC Approximately 10 million years ago, a nearby cluster of stars erupted as a violent series of supernovae and, according to new observations, the million degree plasma from these powerful detonations surround the solar system today. Continue reading →