Neutrino Breakthrough

18 Jul 2018

These linsk came from Jovan. Many thanks. At www.astronomy.com/news/2018/07/icecube-blazar-neutrinos ... and concerns the discovery of a neutrino that is  project to have been emitted from a black hole four billion years ago. It finally ended up on the Antarctic ice sheet - landing in September. A neutrino detector planted by scientists in the ice recorded its presence - with a short blue flash of light. The research is published in Science journal (July 2018). We ar told the scientists were able to confirm the neturino was created in a supermassive black hole at the centre of a far away galaxy. One also has to wonder how this was achieved - as they need to justify the vast sums spent on this kind of research. Neutrinos are also emitted by the Sun - and allegedly from supernovae. Neutrinos are energetic particles that pass through matter. However, when it struck the Antarctic ice it caused a subatomic particle, a muon, to be created - rsulting in the blue flash (recorded by one of the detectors placed in the ice). The arrival of the neutrino coincided with a bust of gamma rays (energetic photons) from a bright blazar, TXS0506+056. Data also reveals that radio emissions from the blazar gradually increased in the 18 months leading up to the neutrino detection.

Jovan also sent in a link to the same story at www.scientificamerican.com/article/neutrinos-on-ice-astronomers-long-hun... ... and see also https://phys.org/print450591605.html

Jovan also sent in another link. This concerns dark matter - go to www.astronomy.com/news/2018/05/the-case-against-dark-matter ... the Hubble constant describes the observed accelerating expansion of the universe - which is unexplained (in mainstream sources). A new theory claims dark energy is responsible - and therefore does not require the existence of dark matter. The theorist behind this, Verlinde, has a specific point of view as an ardent string theorist. Other scientists say this method should be approached with caution. Verlinde is using his intuition to piece together a set of ideas. So, what is dark energy?

Over at https://phys.org/print450611746.html ... Hubble and Gaia (space telescopes) team up to fuel cosmic conundrum. By comparing brightness as measured by Hubble against apparent brightness seen from the earth so that scientists can calculate distances. Gaia refines this by geometrically measureing the distance to Cepheid variables as seem our Milky Way galaxy - to allow calibration of distances to cepheids outside our galaxy. The results further show a mismatch still - and research at ESAs Planck mission comes up with a different predicted value for the Hubble constant. This was discussed by Don Scott at the EU UK conference in July and he suggested the measurements of increasing expansion may be due to galactic birkeland currents (as BCs expand at their boundaries). Time will tell.