You are currently browsing the tag archive for the ‘Astrophysics’ tag.
Well if you ever needed to know your level of cosmic importance…
Yep, still waiting for the chorus of enraged ‘egalitarian’ voices to protest this (continuing) oversight.
I’m glad that our Universe is so large that we shouldn’t have to worry (much) about being erased as a species by a gamma ray burst. :)
Some background on the the latest discovery about the nature of our universe. :) The believers in ooga-booga should be feeling a bit less secure in their grand delusion (It’s a nice thought, but then again, since when do believers let facts get in the way of the TRUTH) .
If was actually good at mathematics, I think I would have been an Astrophysicist. They have such amazing questions to work on.
Returning from vacation is always a pain, as routines need to be reestablished and new ones laid down. The time I usually spend blogging was not available as I was doing the 12 hour drive from Kaslo back to Edmonton. So, now we are catching up slowly with a few word-light/video-heavy posts.
The PI institute does a good job of laying down some basic cosmological questions and explanations. Dark matter (and energy, not mentioned) is a fascinating topic and leads to much speculation about how and why the universe is the way it is.
For a more comprehensive, yet still non-specialist friendly talk on the subject, check out Lawrence Kruass.
A pox on dust, and a severe reprimand for both (well not really) that are messing with our ability to observe the universe around us.
“Cosmic dust is fogging up attempts to study light left over from the Big Bang, and Canadian scientists aim to clear up the problem. The microscopic dust permeates the universe, producing confusing signals in data collected by the Planck space telescope, which is designed to study distant light originating from the beginning of the universe 13 billion years ago. The dust — mainly sand and soot particles, each about the size of a bacterium — makes up about one per cent of the mass in space, not very much compared with the mass of hydrogen and helium, said University of Toronto astronomer Peter Martin.”
Not exactly a problem a good spring cleaning is going to fix.
“Our cosmologist friends would call it ‘noise’,” Martin said. “It’s not blocking [the radiation]. It’s adding to the signal and therefore confusing what might otherwise be pure cosmological cosmic microwave background radiation.” Martin and his colleagues are trying to figure out what microwave signal the dust produces as it glows so that signal can be subtracted out of the overall data, leaving behind the pure microwave background radiation.”
Hopefully the right algorithm can be concocted to compensate for the dust that is making the data in question hard to interpret. One of the neat side discoveries about the dust itself does provide and interesting tangent.
“In the meantime, they have made some interesting discoveries about the dust itself. Based on the signals they measured, for example, they’ve found that some of the dust particles are spinning billions of times a second.
That was one of the first scientific results gathered using the telescope, which was launched in May 2009. It will continue collecting data until the end of 2011 from an orbit 1.5 million kilometres from Earth, toward Mars.
Martin thinks the dust is fascinating in itself because it is where heavy molecules generated within stars, such as carbon — including the carbon that makes up our bodies — has spent most of its existence over the past five billion years.
“When you’re talking to your friends, you’re talking to people that in an earlier existence used to be this interstellar dust.”
The idea that we are stardust and were outgassed from a star a couple billion years ago is pretty cool. Isn’t science grand?
bleatmop
Mystro
The Arbourist
Dead Wild Roses 
Your opinions…