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Cosmos In Brief - Aktualní novinky vesmírného výzkumu v kostce
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VIRGO --- 19:11:57 22.1.2018
Scientists find evidence of strong winds outside black holes

New research shows the first evidence of strong winds around black holes throughout bright outburst events in which black holes rapidly consume mass.

The study sheds new light on how mass transfers to black holes and how they can affect the environment around them.

“Winds must blow away a large fraction of the matter a black hole could eat,’’ said Bailey Tetarenko, a University of Alberta PhD student and lead author
on the study. “In one of our models, the winds removed 80 per cent of the black hole’s potential meal.”

The research was conducted by an international team of researchers, led by Tetarenko and scientists in the U of A's Department of Physics.
VIRGO --- 19:11:07 22.1.2018
A ‘hot Jupiter’ with unusual winds | Newsroom - McGill University

The hottest point on a gaseous planet near a distant star isn’t where astrophysicists expected it to be –
a discovery that challenges scientists’ understanding of the many planets of this type found in solar systems outside our own.

Unlike our familiar planet Jupiter, so-called hot Jupiters circle astonishingly close to their host star -- so close that it typically takes fewer than three days to complete an orbit.
And one hemisphere of these planets always faces its host star, while the other faces permanently out into the dark. Not surprisingly, the “day” side of the planets gets vastly hotter
than the night side, and the hottest point of all tends to be the spot closest to the star. Astrophysicists theorize and observe that these planets also experience strong winds blowing
eastward near their equators, which can sometimes displace the hot spot toward the east.

In the mysterious case of exoplanet CoRoT-2b, however, the hot spot turns out to lie in the opposite direction: west of center. A research team led by astronomers at McGill University’s
McGill Space Institute (MSI) and the Institute for research on exoplanets (iREx) in Montreal made the discovery using NASA’s Spitzer Space Telescope. Their findings are reported Jan. 22
in the journal Nature Astronomy.

VIRGO --- 19:09:29 22.1.2018
A New Bound on Axionssu201802 | www.cfa.harvard.edu/

CfA astronomer Paul Nulsen and his colleagues used a novel method to investigate the nature of axions. Quantum mechanics constrain axions, if they exist, to interact with light in the presence of a magnetic field.
As they propagate along a strong field, axions and photons should transmute from one to the other other in an oscillatory manner. Because the strength of any possible effect depends in part on the energy of the photons,
the astronomers used the Chandra X-ray Observatory to monitor bright X-ray emission from galaxies. They observed X-rays from the nucleus of the galaxy M87, which is known to have strong magnetic fields, and which (at
a distance of only fifty-three million light-years) is close enough to enable precise measurements of variations in the X-ray flux. Moreover, M87 lies in a cluster of galaxies, the Virgo cluster, which should insure
the magnetic fields extend over very large scales and also facilitate the interpretation. Not least, M87 has been carefully studied for decades and its properties are relatively well known.

The search did not find the signature of axions. It does, however, set an important new limit on the strength of the coupling between axions and photons, and is able to rule out a substantial fraction of the possible
future experiments that might be undertaken to detect axions. The scientists note that their research highlights the power of X-ray astronomy to probe some basic issues in particle physics, and point to complementary
research activities that can be undertaken on other bright X-ray emitting galaxies.
VIRGO --- 19:10:14 19.1.2018
Update on an Interstellar Asteroid

Are we sure ‘Oumuamua didn’t originate in our solar system and get scattered into a weird orbit? Jason Wright (The Pennsylvania State University)
demonstrates via a series of calculations that no known solar system body could have scattered ‘Oumuamua onto its current orbit — nor could any as
yet unknown object bound to our solar system.

Eric Mamajek (Caltech and University of Rochester) shows that the kinematics of ‘Oumuamua are consistent with what we might expect of interstellar
field objects, though he argues that its kinematics suggest it’s unlikely to have originated from many of the nearest stellar systems.

VIRGO --- 19:08:21 19.1.2018

Asteroid 2002 AJ129 will make a close approach to Earth on Feb. 4, 2018 at 1:30 p.m. PST (4:30 p.m. EST / 21:30 UTC). At the time of closest approach,
the asteroid will be no closer than 10 times the distance between Earth and the Moon (about 2.6 million miles, or 4.2 million kilometers).

2002 AJ129 is an intermediate-sized near-Earth asteroid, somewhere between 0.3 miles (0.5 kilometers) and 0.75 miles (1.2 kilometers) across. It was discovered
on Jan. 15, 2002, by the former NASA-sponsored Near Earth Asteroid Tracking project at the Maui Space Surveillance Site on Haleakala, Hawaii. The asteroid’s
velocity at the time of closest approach, 76,000 mph (34 kilometers per second), is higher than the majority of near-Earth objects during an Earth flyby.
The high flyby velocity is a result of the asteroid’s orbit, which approaches very close to the Sun -- 11 million miles (18 million kilometers). Although asteroid
2002 AJ129 is categorized as a Potentially Hazardous Asteroid (PHA), it does not pose an actual threat of colliding with our planet for the foreseeable future.

VIRGO --- 16:47:52 19.1.2018
Comet Discoverer Thomas Bopp (1949–2018) - Sky & Telescope

An unassuming amateur astronomer forever linked to one of the greatest comets in modern history has passed away.

Thomas Joel Bopp, the co-discoverer of Comet Hale-Bopp, died January 5, 2018, in Phoenix, Arizona, from liver cancer. He was 68 years old.


VIRGO --- 15:57:29 19.1.2018
Woow! Launch Of A Epsilon-3 Rocket taken by KAGAYA on January 18, 2018 @ Okinawa Island in Japan

VIRGO --- 14:27:01 19.1.2018

Chris Packham, associate professor of physics and astronomy at The University of Texas at San Antonio (UTSA), has collaborated on a new
study that expands the scientific community’s understanding of black holes in our galaxy and the magnetic fields that surround them.

Packham and astronomers lead from the University of Florida observed the magnetic field of a black hole within our own galaxy from multiple
wavelengths for the first time. The results, which were a collective effort among several researchers, are deeply enlightening about some of
the most mysterious objects in space.