tak bohužel špatné zprávy :(

Hurricane Damages Giant Radio Telescope—Why It Matters
http://relay.nationalgeographic.com/...o-radio-telescope-damaged-puerto-rico-hurricane-maria-science

Forming Planetesimals in a Dust and Gas Vortex
http://aasnova.org/2017/09/19/forming-planetesimals-in-a-dust-and-gas-vortex/

Planet formation still holds many mysteries for today’s astronomers. One of the biggest unknown is how pebbles and dust clump together to form planetesimals
rather than drifting in towards the star due to its strong gravitational pull. A possible solution is dust traps — in a circumstellar disk, the inward drift
of the pebbles and particles can be stopped by high pressure in the gaseous disk. A dust trap like this would be an ideal place to form planetesimals. The
authors of today’s paper look at a circumstellar disks around AB Aur. They create hydrodynamical simulations of the dust and gas to see if there is a dust
trap with the possible formation of small planets.

Circumstellar disks are the link between bunches of dust around a star and fully formed planetesimals. There are a few types of circumstellar disks —
protoplanetary, transition, and debris. A transition disk is exactly what it sounds like — a transition from protoplanetary to debris, which means that
planets would likely be forming in a transition disk. About 450 light-years away from us, AB Aur hosts an asymmetric transition disk. The unevenness of ¨
the disk could indicate a dust trap or gas vortex. At about 120 AU from the central star, the cold dust emission disk creates an asymmetric ring in the disk.

Nanosat fleet proposed for voyage to 300 asteroids – Europlanet Outreach
http://www.europlanet-eu.org/nanosat-fleet-proposed-to-300-asteroids/

A fleet of tiny spacecraft could visit over 300 asteroids in just over three years, according to a mission study led by the Finnish Meteorological Institute.
The Asteroid Touring Nanosat Fleet concept comprises 50 spacecraft propelled by innovative electric solar wind sails (E-sails) and equipped with instruments
to take images and collect spectroscopic data on the composition of the asteroids. Each nanosat would visit six or seven asteroids before returning to Earth
to deliver the data. The concept will be presented by Dr Pekka Janhunen at the European Planetary Science Congress 2017 in Riga on Tuesday 19th September.

VLASS:
VLA Begins Huge Project of Cosmic Discovery – National Radio Astronomy Observatory
https://public.nrao.edu/news/vla-begins-huge-project/

Astronomers have embarked on the largest observing project in the more than four-decade history of the National Science Foundation’s
Karl G. Jansky Very Large Array (VLA) — a huge survey of the sky that promises a rich scientific payoff over many years.

Over the next 7 years, the iconic array of giant dish antennas in the high New Mexico desert will make three complete scans of the sky
visible from its latitude — about 80 percent of the entire sky. The survey, called the VLA Sky Survey (VLASS), will produce the sharpest
radio view ever made of such a large portion of the sky, and is expected to detect 10 million distinct radio-emitting celestial objects,
about four times as many as are now known.

https://www.nasa.gov/feature/goddard/2017/hubble-captures-blistering-pitch-black-planet

NASA's Hubble Space Telescope has observed a planet outside our solar system that looks as black as fresh asphalt because it eats light rather than reflecting it back into space. This light-eating prowess is due to the planet's unique capability to trap at least 94 percent of the visible starlight falling into its atmosphere.

Cassini’s last look around Saturn’s neighbourhood before concluding its 13-year journey of discovery

Poslední snímky

Impact Site: Infrared Image



Enceladus Setting Behind Saturn

Díky!

UUUFFFFFFFFFFFFFFFFF,

právě přícházejí ÚPLNĚ POSLEDÍ RAWy...



https://saturn.jpl.nasa.gov/galleries/raw-images?order=earth_date+desc&per_page=50&page=0