Showing posts with label stars. Show all posts
Showing posts with label stars. Show all posts

Thursday, March 17, 2011

Super-Moon: Closest Orbit In 18 Years

It has been, my Dear Readers, a touch too long since I’ve given you some good, ol’ fashioned astronomy news. And it’s practical stuff, too…


The moon will not be dangerous, but they way it is peaking over those hills, it may be a little creepy
the night of the 18th…

On March 18th, the moon will make its closest approach to earth in eighteen years, coming to the close orbiting distance of 356,777 kilometers from earth’s surface. It may not appear all that much brighter or larger to the naked eye (and most of our eyes are just that) but through a telescope the moon will appear to be seven percent larger than on a normal evening. Scientists and nerdy amateur astronomers refer to this event as the rare “supermoon” phenomenon which only occurs a handful of times a century.

The close proximity of the moon will have some massive and potentially dangerous impacts on the tides. Experts warn that tidal changes will be much faster and severe, and expect that tidal flooding could be a problem in some areas. Fisherman and port workers in the early morning are especially at risk.

Friday, January 28, 2011

The Oldest Galaxy In The Universe

The Hubble Space Telescope, the lingering tool of NASA as programs and funding are cut or shut down, has found what might be the oldest galaxy ever encountered. The so-far unnamed galaxy (the Bohunk proposes "Bohunkxia 23) is estimated to have originated when the universe was just 480 million years old, a fresh, doe-eyed age when galaxies were forming at amazing rates. The light of the galaxy has been travelling to earth for about 13.2 billion years now, making it oldest known entity we have yet encountered. This discovery is still unconfirmed, but it should be quite soon and dethrone other galaxies as the oldest around. Before this discovery, the oldest galaxies known were formed around 650 millions years after the Big Bang. The discover still leaves some basic questions unanswered. Why is the universe transparent? With all these elements, especially unbound atoms and neutrinos zooming about, why are even waves invisible or elusive in the light of stars and galaxies? Does the universe hold enough heat and light to burn of this 'mist', or is some other aspect of the universe at work? We don't know everything, we know almost nothing. The universe, my friends, is the greatest mystery.