Astronomy news

Rogue Star

Sent in by William. At https://phys.org/news/2018-07-rogue-star-makeup-solar.html ... did a rogue star change the makejup of our solar system? A team of researchers from the Max Planck Institute and Queens University in Belfast have been looking at a theory that claims a rogue star passed close enough to our solar system (millions of years ago of course) and changed its configuration. The research is published on the arXiv preprint server.

Meercats

Sent in by Jovan. At www.skyandtelescope.com/astronomy-news/60-second-astronomy-news-must-see... .... a full array of 64 radio dishes that make up MeerKAT radion telescope was inaugurated on July 13th (2018). They released a streaming iamge of the Milky Way's central region, a panorama covering an area of 1000 light years by 500 light years ...

Guide to astronomy

Interesting guide to astronomy (but nothing controversial) - go to https://hobbyhelp.com/astronomy/?msID=c9be530a-1526-41bf-ae76-30e9e108cc73

Staring Down the Barrel of a Black Hole

At https://blogs.discovermagazine.com/crux/2018/07/12/what-is-a-blazar/ ... a blazar is like staring down the barrel of a black hole, we re informed ....

Neutrino Breakthrough

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).

Lunar Dust, Io, and Pluto

Sent in by Robert - a new volcano on Io (recorded by the Juno mission) - got to https://astronomynow.com/2018/07/14/a-new-volcano-on-io-juno-data-indica... ... Io is the most geologically active body in the solar system - and Juno is revealing new hot spots.

Asteroids and other things

Robert sent in the link https://astronomynow.com/2018/07/02/dawn-zooms-in-on-vestas-enigmatic-oc... ... the Dawn spacecraft is nearing the Ceres asteroid.

At http://global.jaxa.jp/projects/sat/hayabusa2/ ... the Japanese space mission to asteroid Ryugu, 3.2 billion km away

At https://phys.org/print449734697.html ... the secret origins of asteroids and meteorites. Instead of a planet sized object splitting apart we now have five or six minor planets breaking up and creating 85 per cent of the 200,000 steroids in the so called asteroid belt.

Eta Carinae

Big news this week on the astronomy front - NuSTAR mission proves superstar Eta Carinae shoots out cosmic rays (see https://phys.org/print449835766.html ... a study using data from NASAs NuSTAR space telescope suggests Eta Carinae, the most prominent and massive stellar system within 10,000 light years, is accelerating particles of high energy - some of which arrive in our solar system.

Uranus in Collision

Sent in By Robert - www.centauri-dreams.org/2018/07/03/uranus-orbital-tilt-from-a-cataclysmi... .... the excessive tilt in the orbit of Uranus was caused by a cataclysmic collision, we are informed. This seems to have been provoked by the discovery that exoplanets can have tilted orbits. In our solar system the Earth is titled at 23 degrees and Uranus by 98 degrees - but in contrast Mercury has a small tilt, at only 0.3 degrees. The amount of obliquity affects seasonality.

Comet and Oxygen

At https://phys.org/print449835597.html ... molecular oxygen found on Comet Churyumov-Gerasimenko back in 2016 is not produced on its surface according to an analysis of Rosetta data. Instead, it must have an origin in the interior of the comet. Instruments onboard Rosetta analysed the comet's coma and revealed it had water, carbon monoxide, carbon dioxide, and molecular oxygen. On Earth oxygen is essential for life - and it is thought to be produced by photosynthesis. It seems oxgen on Earth may also have an origin inside the planet - topped up by photosynthesis.