Astronomy news

Moons of Uranus

William sent in this link to https://phys.org/print423907645.html ... where researches from the University of Idaho and Wellesley College say they have found evidence two pairs of moons orbiting Uranus are on a collision course. The paper has been uploaded to the arXiv preprint server - see www.arxiv.org/abs/1708.07566

Sun spots and flares

At https://phys.org/print423925975.html ... it seems the recent Near Earth Object that sailed within 4.4 million miles of the Earth in late August had two moons - or two objects in tow. Other NEOs are known to have moons - or closely orbiting smaller cosmic bodies. Are these in resonance with the large body and if so do they represent a greater threat?

Rainbows

Quite apart  from modern political symbolism rainbows have in the past also been appropriated for dubious reasons. For example, they once had a deep religious significance as they were viewed as a divine sign from God to Noah to signal the end of the Flood event. Isaac Newton was heavily criticised by some factions of the establishment when in 1704 he shone a light through a glass prism to show that when light was bent it split into its component colours - the spectrum of the rainbow.

Black Hole Anomaly

Sandia National Laboratory has conducted a hands on experiment that appears to contradict another assumption - and this concerns the X-ray spectra from the vicinity of black holes (see https://phys.org/print423147374.html). The experimental results were published in the journal Physical Review Letters and came about as emissions directly from black holes cannot be observed. We see emissions from surrounding matter before it is consumed into the accretion disc.

Saturns's Rings

The big story of the week is that Saturn's rings may be a relatively recent fixture. Gary sent in the link to www.dailymail.co.uk/sciencetech/article-4836376/Saturn-s-rings-just-100-... ... It was assumed Saturn's rings go back to the early solar system, we are told, which belies the objectivity of relying on an assumption as this one was a false flag. It seems the rings of Saturn formed much more recently - the late dinosaur age is suggested, 100 million years ago.

Comet Asteroid

At https://phys.org/print422864597.html ... a comet that became an asteroid. Comet Blanpain was first seen and recorded in 1819 - but subsequently disappeared. In 2003 astronomers discovered a small asteroid still orbiting along the former path of the comet - which appears to be the gassed out core of the comet. The gas and dust that was left behind by the comet is still there - the Phoenicid meteor shower (from the constellation Phoenix).

x-ray supernovae

At https://phys.org/print422704328.html ... scientists have detected x-rays from what appears to be a type 1a supernova. Exploding stars are an interesting phenomenon and we are told astrophysicists do not fully understand them. Astronomers like supernovae as they are thought to be caused when a white dwarf star undergoes a thermonuclear explosion, as they have a high degree of brightness. This allows them to calculate how far away from Earth they are and aid in the mapping of the universe. However, not all supernovae play ball ... ....

Mars Bow Shock

At https://tallbloke.wordpress.com/2017/08/22/the-moving-martian-bow-shock/ ... solar EUV (ultra violet radiation) is an important feature of the solar wind. As energetic particles of the solar wind cross space inside the solar system they are modified by cosmic objects in their path - including the planets. This pieces is also derived from PhysOrg we may note but the comments are interesting. Scientists already are aware of the bow shock, upstream of planets - like the bow of a ship (the waves that rises up at the side and behind).

House Size asteroid

At https://phys.org/print421584715.html ... a house sized asteroid will whizz past the Earth on October 12th, we are told, well within the orbit of the Moon and not too far from the orbit of satellites going around the Earth. It will pass by at a distance of 27,300 miles, an eighth of the distance from Earth to Moon.

Millions of black holes

At https://phys.org/print421408278.html ... there are a lot more black holes in the Milky Way than previously thought according to a University of California Irvine study. There are in the order of tens of millions in our galaxy alone - and we once thought there was just one big black hole in the galaxy centre - somewhat like the black liquorice surrounded by pink or yellow coconut in a Bassets Liquorice Allsorts. There might even be as many as 100 million of the black holes - so how does this abundance square with mainstream black hole theory?