A Kalahari Sky
Image Credit & Copyright: Petr Horálek
https://apod.nasa.gov/apod/ap170530.html

Explanation: You wake up in the Kalahari Desert in Botswana, Africa. You go outside your tent, set up your camera, and take long exposures of the land and sky. What might you see? Besides a lot of blowing dust and the occasional acacia tree, you might catch many sky wonders. Pictured in 2015 September, sky highlights include the central band of our Milky Way Galaxy, the Pleiades Star Cluster, Barnard's Loop, and both the Large and Small Magellanic Clouds, to name just a few. Although most of these faded in the morning light, they were quickly replaced by a partial eclipse of the Sun.



(pozn: zaujalo mne, že Orion je postavený "na hlavu"; celé je to vlastně obráceně, z pochopitelných důvodů)

Hubble Telescope Zoom In On The Veil Nebula - NASA
https://www.youtube.com/watch?v=9y8mlNbN-dQ

James Webb Space Telescope Acoustic Testing
https://www.youtube.com/watch?v=2ru_UfJmvIo

VINCENT_BU: Fantazie, dík moc, teď nestíhám, a čekají mě přesuny, ale př. týden si to všechno dám v klidu.

Jinak doporucuji Astronomy and Astrophysics Paula Carra. Snad link funguje, jsem připojen jen přes malé mobilní zařízeni,
vše jde pomaleji. Sleduje Tabby intenzivnê.

Astronomy and Astrophysics - Google+
https://plus.google.com/collection/cvH6GB

+paul carr na G+

VIRGO: tady je případně celé vlákno k diskuzi o Tabby's Star. Myslím, že se tam shromažďují všechny podstatné aktuální odkazy: https://www.reddit.com/r/KIC8462852/

VINCENT_BU: jízda! :o

Collapsing Star Gives Birth to a Black Hole (without going supernova)
Astronomers have watched as a massive, dying star was likely reborn as a black hole. It took the combined power of the Large Binocular Telescope (LBT), and NASA's Hubble and Spitzer space telescopes to go looking for remnants of the vanquished star, only to find that it disappeared out of sight. It went out with a whimper instead of a bang. The star, which was 25 times as massive as our sun, should have exploded in a very bright supernova. Instead, it fizzled out –– and then left behind a black hole.

Star Gives Birth to Possible Black Hole in Hubble and Spitzer Images
https://www.youtube.com/watch?v=bL1sQjNsuws#t=11


more also here: https://www.jpl.nasa.gov/news/news.php?feature=6858

Schiaparelli: Crashed lander was ill-prepared for Mars - BBC News
http://www.bbc.com/news/science-environment-40029180#

ještě jeden obrázek k Tabby's Star, shrnutí fluktuace zdánlivé magnitudy za květnové dny od amatérského pozorovatele. Na stránce http://www.brucegary.net/KIC846/ jsou další grafy.

VIRGO & HOWKING:

Tak pravdepodobne jen nekldo zaspal u korekce. Podle CHMU.cz se pry vychyluji ty druzice uplne bezne, ale o kousek a doladuje se to datove na zemi. Takze pravdepodobne se jedna o upravu obezne drahy provedenou za pomoci trysek, jen nekdo v Darmstadtu zaspal svoji sluzbu a nestihl tak korekci vcas... :-)

Cornell University Library
KIC 8462852: Will the Trojans return in 2021?
(Submitted on 23 May 2017)

"[…] We aim at offering a relatively natural solution, invoking only phenomena that have been previously observed, although perhaps in larger or more massive versions. We model the system using a large, ringed body whose transit produces the first dimming and a swarm of Trojan objects sharing its orbit that causes the second period of multiple dimmings. The resulting orbital period is T≈12 years, with a semi-major axis a≈6 au. In this context the recent observation of a minor dimming can be explained as a secondary eclipse produced by the passage of the planet behind the star. Our model allows us to make two straightforward predictions: we expect the passage of a new swarm of Trojans in front of the star starting during the early months of 2021, and a new transit of the main object during the first half of 2023."



https://arxiv.org/abs/1705.08427

další komentáře od prof. Davida Kippinga https://twitter.com/david_kipping