Universitat de Barcelona - The study of a galactic microquasar provides the explanation for the structure of faraway radio galaxies
http://www.ub.edu/web/ub/en/menu_eines/noticies/2017/11/048.html

Researchers from the Institute of Cosmos Sciences of the University of Barcelona (ICCUB) and the University of Jaén have described,
for the first time, the structure of a Z-shaped galactic microquasar. This astronomical object is considered to be a small-scale version
of a winged radio galaxy, so far considered one of the distant sources which are potential emitters of gravitational waves. In this sense,
the main conclusion of the study, published in Nature Communications, says that not all winged radio galaxies would be the source of
gravitational waves, unlike what was thought so far.

JULIANNE: Klasická nestíhačka. Bude záznam na YT?

Tak už dnes :).

https://www.facebook.com/events/871761692977769

http://www.utu.fi/...Measure-Neutron-Star-Size-Uses-Modelling-Based-on-Thermonuclear-Explosions.aspx

Neutron stars are made out of cold ultra-dense matter. How this matter behaves is one of the biggest mysteries in modern nuclear physics.
Researchers developed a new method for measuring the radius of neutron stars which helps them to understand what happens to the matter
inside the star under extreme pressure.

[1709.09120] Neutron star mass and radius measurements from atmospheric model fits to X-ray burst cooling tail spectra
https://arxiv.org/abs/1709.09120

The Tyranny of Extraterrestrial Messaging - Scientific American Blog Network
https://blogs.scientificamerican.com/life-unbounded/the-tyranny-of-extraterrestrial-messaging/

Some of the basic assumptions we make about extraterrestrial communication can be woefully naïve. Consider the situation in its gory detail.
You decide (perhaps as a species, or perhaps as some resource-rich subset) that you want to ping the cosmos to find out if something else is
listening, thinking, and as technological as you are. So you fire up your radio transmitter, or your big laser and start shooting off ‘Hello’
messages.

If our circumstances represent a useful template it means that the earliest possible response might come within about 8 years (Earth years of
course). That's assuming that there is a responder in the nearest exoplanetary system, listening and receiving your first message at the right
time, ready to fire back a response right away, willing to fire back a response, and capable of firing back something recognizable as a response.
So, you start listening carefully 8 years later. But nothing comes in. So, you keep listening, telling yourself that it may take time for anyone
to put a response together. And you keep listening.

Meanwhile, you’ve been busy. In the last 8 years you’ve been pinging the next furthest stellar systems. But for these the roundtrip light travel
times go up to 10 years, 20 years, 40 years. Within the sphere of space for a 40-year messaging roundtrip are roughly 150 stars.

Shards, Axis Ratios and Interstellar Objects
https://www.centauri-dreams.org/?p=38854

With ‘Oumuamua, though, we now have to ask whether the 10 to 1 ratio is actually correct, as Jason Wright noted in a recent post.
The problem here is that, unlike the situation with Boyajian’s Star, we have a small dataset to work with, and according to Wright
(Penn State), researchers are getting different aspect ratios, ranging all the way from the aforementioned 10 to 1 down to
a relatively ordinary 3 to 1.

If the latter is the case, the interstellar object may look something more like Haumea than the Shard. “I’ll need to see a lot more
data and hard, critical analysis of the anomalies in ‘Oumuamua before I get interested in the SETI angle at the level I am for Tabby’s
Star,” adds Wright.

'Oumuamua: An Interstellar Visitor
https://www.youtube.com/watch?v=4N3_bxZHDDI

https://www.nature.com/articles/nature25020

https://www.eso.org/public/archives/releases/sciencepapers/eso1737/eso1737a.pdf

Press Release - Uncovering the Origins of Galaxies' Halos
https://www.naoj.org/Pressrelease/2017/08/02/index.html

Using the Subaru Telescope atop Maunakea, researchers have identified 11 dwarf galaxies and two star-containing halos
in the outer region of a large spiral galaxy 25 million light-years away from Earth. The findings, published in The
Astrophysical Journal, provide new insight into how these 'tidal stellar streams' form around galaxies.

Researchers from Tohoku University and colleagues used an ultra-wide field of view camera on the Subaru Telescope to
develop a better understanding of stellar halos. These ring-shaped collections of stars orbit large galaxies and can
often originate from smaller dwarf galaxies nearby.

The team focused their attention on Galaxy NGC 4631, otherwise known as the Whale Galaxy because of its shape. They
identified 11 dwarf galaxies in its outer region, some of which were already known. Dwarf galaxies are not easily
detected because of their small sizes, masses and low brightness. The team also found two tidal stellar streams orbiting
the galaxy: one, called Stream SE, is located in front of it and the other, called Stream NW, is nestled behind it.

Kepler Planets Tend to Have Siblings of the Same Size
http://aasnova.org/2017/11/20/kepler-planets-tend-to-have-siblings-of-the-same-size/

After 8.5 years of observations with the Kepler space observatory, we’ve discovered a large number of close-in, tightly-spaced, multiple-
planet systems orbiting distant stars. In the process, we’ve learned a lot about the properties about these systems — and discovered some
unexpected behavior. A new study explores one of the properties that has surprised us: planets of the same size tend to live together.

VIRGO: HST is looking at the interstellar Asteroid A-2017-U1 with Wide Field Camera 3.

SpaceTelescopeLive
http://spacetelescopelive.org/2017-11-21T03:17:00+00:00

VIRGO:

Animation of `Oumuamua passing through the Solar System (annotated)
https://www.youtube.com/watch?v=O6PpbO7vIjU