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Nočná obloha od severného po južný pól.

Petr Horalek on March 4, 2016 @ Maba beach, Halmahera, Indonesia
http://www.astronom.cz/horalek/?p=2281
Canon 6D IR Baader modified, Samyang 24 mm, f2.8, ISO 10000, 24×15 sekund panorama zo statívu

Edit 30.3.
Zaujímavé čítanie od Petr Horalek http://www.astro.cz/clanky/ukazy/gerhan ... tmeni.html

Pohyb hviezd v M51, ale hlavne pokrok techniky.
Álvaro Ibáñez Pérez on March 29, 2015 @ Spain

DSS image is of the Schmidt telescope 48-inch at Monte Palomar (CA, USA) only one frame in April 8, 1956. My image is a stack of 30x300s the last year in March 29, 2015 (59 years apart)

Profesionálny jeden snímok z roku 1956 a amatérsky zosnímané a spracované 2015.

Nebudou to spíše hvězdy naší Galaxie?

Samozrejme, hviezdy našej galxie v okolí M51.

Hviezdy v M51 sa hýbu istotne tiež, len na tom obrázku to nie je meratelné.

Ale ako som písal, viac ma upútal pokrok techniky. Snimok z pred 60 rokov je z 1200 mm /48"/ dalekohľadu.
https://en.wikipedia.org/wiki/Palomar_Observatory
"The 48-inch Samuel Oschin Telescope (Schmidt Camera) was started in 1938 and installed in 1948. It was initially called the 48–inch Schmidt, and was dedicated to Samuel Oschin in 1986.[7] The dwarf planet Eris was discovered using this instrument.[8] The existence of Eris triggered the discussions in the international astronomy community that led to Pluto being re-classified as a dwarf planet."

A porovnanie s kvalitou súčasnej amatérskej techniky je v tom gife.

No mě spíš zaujala kvalita tý Palomarský, tedy to, že je velmi vysoká, čekal jsem horší.

Vyhľadal som na webe, Álvaro Ibáñez Pérez fotí s:
Telescope: TS115 Triplet APO refractor
Reducer: TS Optics 0,79x
Mount: NEQ6 Pro II Tuning Belts + EQMOD
Camera: CCD Atik 460EX mono + Baader LRGB + IDAS LPS
Guider: Lunático EZG-60 + SXLodestar
Focus: RoboFocus + FocusMax,

to je 10 násobný rozdiel v priemere, a treba si uvedomiť, že dopadajúce svetlo je druhou mocninou priemeru, tak to je 100x rozdiel.
Vďaka skladaniu záberov pomocou software sa 30 snímkov po 300 sekúnd z 115mm vyrovnajú jednému z 1200mm. V tom je ten pokrok.

Tu je snímka POSS1 red 15´x15´
http://archive.stsci.edu/cgi-bin/dss_fo ... ver=SIMBAD

viac o Palomar Observatory Sky Survey
https://cs.wikipedia.org/wiki/Observato%C5%99_Palomar

Roku 1958 observatoř dokončila tzv. Palomar Observatory Sky Survey (POSS), desetiletou prohlídku oblohy, sponzorovanou společností National Geographic. Tento průzkum byl proveden pomocí Teleskopu Samuela Oschina, který oblohu snímal na 35cm fotografické desky Kodak 103a-O citlivé na modré světlo a Kodak 103a-E citlivé na červené světlo. Průzkum původně pokryl oblohu od deklinace +90 stupňů (severní nebeský pól) po -27 stupňů ve všech rektascenzích, s citlivostí do +22 magnitud (přibližně milionkrát citlivější než lidský zrak).

Je to 2x936 14" fotografických dosiek s dosahom 20 (103a-O ), 21 (103a-E) magnitudy, s 6°x6°FOV, z rokov 1950-58.

https://en.wikipedia.org/wiki/National_ ... Sky_Survey
http://www.astro.caltech.edu/palomar/ab ... schin.html


panorama of 96 photographic plates from the National Geographic Society-Palmar Observatory Sky Survey (1949-58); the other 1,700+ plates are in the cabinet.


detail photographic plate NGS-POSS, v skle sa odrážajú exponáty zavesené na protiľahlej stene.

APOD dňa 31.3. sa stal snímok Od Velkého vozu k Jižnímu kříži:
http://www.astro.cz/apod/ap160331.html

Maximilian Teodorescu on March 31, 2016 @ Magurele, Romania
"The transit was predicted by Calsky," says Teodorescu. "Together with my wife and her brother, we traveled 40 kilometers from home to be in exactly the right spot to see the space station fly in front of Jupiter. It turns out, we were about 100 meters off, and the ISS missed the giant planet."

"Even so," he says, "the view was spectacular."

Teodorescu's image illustrates the scale of the space station. Measuring more than 100 meters wide, the behemoth spacecraft orbiting Earth is an easy target for backyard telescopes on the ground below. If it had passed directly in front of Jupiter, it would have blotted out much of the planetary disk.

The image also shows that the ISS has a higher surface brightness than Jupiter. That's because sunlight reflects easily from the station's metallic surfaces--much more so than from Jupiter's absorbing cloudtops. Indeed, sunlight glinting from the station's solar arrays sometimes causes flares as bright as magnitude -8, more than 200 times brighter than the entirety of the giant plane

ISS a Jupiter dnes večer 20:42 na 400 mm aps-c. Predpoveď počasia je ale zamračené.