Uploaded April 2016 | Updated September 2026, 5 days ago
Deutsch (for english description see below)
Dieses Video zeigt eine kurze Beobachtungssession eines großen Sonnenflecks am 17. April 2016. Das Equipment bestand aus einem Maksutov-Teleskop mit 90mm Öffnung und 1250mm Brennweite (Mak 90/1250) auf einer manuell nachgeführten Astro-3-Montierung und einer ALccd5L-IIc Kamera. Man kann deutlich die Luftunruhe (Seeing genannt) erkennen. Die ursprüngliche Auflösung war 1280x960 im Raw-Modus. Runterskaliert auf 720x576 in Graustufen.
Das Ergebnisbild ist hier zu finden: flickr.com/photos/astropage_eu/26456616806
Credit: astropage.eu
English
This video shows a short observing session of a huge sunspot on April 17th, 2016. The equipment used was a Maksutov (Mak) telescope with 90mm aperture and 1250mm focal length (often named Mak 90/1250). The telescope was attached on a manually tracked Astro-3 mount. An ALccd5L-IIc planetary imaging camera recorded the video data. You can clearly see the influence of the so-called "Seeing" - the disturbances of earth's atmosphere. Original resolution was 1280x960 in raw mode. Scaled down to 720x576 greyscale.
This is the resulting image: flickr.com/photos/astropage_eu/26456616806
Credit: astropage.eu
Deutsch (for english description see below)
Dieses Video zeigt eine kurze Beobachtungssession eines großen Sonnenflecks am 17. April 2016. Das Equipment bestand aus einem Maksutov-Teleskop mit 90mm Öffnung und 1250mm Brennweite (Mak 90/1250) auf einer manuell nachgeführten Astro-3-Montierung und einer ALccd5L-IIc Kamera. Man kann deutlich die Luftunruhe (Seeing genannt) erkennen. Die ursprüngliche Auflösung war 1280x960 im Raw-Modus. Runterskaliert auf 720x576 in Graustufen.
Das Ergebnisbild ist hier zu finden: flickr.com/photos/astropage_eu/26456616806
Credit: astropage.eu
English
This video shows a short observing session of a huge sunspot on April 17th, 2016. The equipment used was a Maksutov (Mak) telescope with 90mm aperture and 1250mm focal length (often named Mak 90/1250). The telescope was attached on a manually tracked Astro-3 mount. An ALccd5L-IIc planetary imaging camera recorded the video data. You can clearly see the influence of the so-called "Seeing" - the disturbances of earth's atmosphere. Original resolution was 1280x960 in raw mode. Scaled down to 720x576 greyscale.
This is the resulting image: flickr.com/photos/astropage_eu/26456616806
Credit: astropage.eu

![Tour of NGC 2207 and IC 2163
http://www.astropage.eu/index_news.php?id=1797 Astro-Bild der Woche: Die interagierenden Galaxien NGC 2207 und IC 2163
At this time of year, there are lots of gatherings often decorated with festive lights. When galaxies get together, there is also the chance of a spectacular light show. Take, for example, NGC 2207 and IC 2163. Located about 130 million light years from Earth in the constellation of Canis Major in the southern hemisphere, this pair of spiral galaxies is caught in a grazing encounter. This system has hosted three supernova explosions in the past 15 years, which is quite a few in such a short time.
This galactic pair has also produced one of the most bountiful collections of super bright X-ray lights known. These special objects - officially known as ultraluminous X-ray sources or ULXs - have been found using data from NASAs Chandra X-ray Observatory. As in our Milky Way galaxy, NGC 2207 and IC 2163 are sprinkled with many systems known as X-ray binaries, which consist of a star in a tight orbit around either a neutron star or a stellar-mass black hole. The strong gravity of the neutron star or black hole pulls matter from the companion star. As this matter falls toward the neutron star or black hole, it is heated to millions of degrees and generates X-rays. ULXs are far brighter in X-rays than most normal X-ray binaries. While the true nature of ULXs is still debated, they are likely an unusual type of X-ray binary. For example, some astronomers think that the black holes in some ULXs may be heavier than stellar mass black holes and could represent a hypothesized, but as yet unconfirmed, intermediate-mass category of black holes. Regardless of what they are, ULXs put on intriguing X-ray light displays no matter what the season.
[Runtime: 02:14]
(Credit: NASA/CXC/A. Hobart) Tour of NGC 2207 and IC 2163](https://i.ytimg.com/vi/K_P67oCXG1E/mqdefault.jpg)








