NEBULA: Z dlouhodobého hlediska (obyvatelnosti) je jediná cesta dál od Slunce.
Nestabilita se bude zhoršovat. Ale souhlasím s Darkmoorem, že její studium je důležité už kvůli tomu,
aby to na Zemi neskončilo podobně co se týče klimatických podmínek.

Dostávat se blíž ke Slunci je i náročnější, ale hlavně na povrchu Venuše probíhá mejdan,
na kterém fakt nemáme co pohledávat.

The LISA Mission proposal was submitted today!

In response to the call of the European Space Agency (ESA) for L3 mission concepts,
the LISA Mission consortium submitted the proposal for the Laser Interferometer Space Antenna today.

The proposal document will be published in a few days on the LISA Mission homepage.

LISA - mission concept proposal
https://www.lisamission.org/consortium/

Mystery Object in Cygnus A Galaxy - Sky & Telescope
http://www.skyandtelescope.com/astronomy-news/mystery-object-in-cygnus-a-galaxy-1301201623/

Astronomers have discovered an object in the active galaxy Cygnus A that wasn’t there before.

Last week at the American Astronomical Society meeting in Grapevine, Texas, astronomers made an announcement
that’s caught the interest of several researchers: a very bright something has appeared in a well-known galaxy.

That galaxy is the elliptical Cygnus A. Cygnus A is one of the brightest radio sources in the sky. It lies approximately 800 million
light-years from us (redshift of 0.056). In its core sits a supermassive black hole madly eating and cocooned in gas, while two jets
shoot out to either side and light up the intergalactic medium. This activity produces the radio radiation that makes Cygnus A so bright.

Using the recently upgraded Karl G. Jansky Very Large Array (VLA) in New Mexico, Rick Perley (NRAO) and colleagues took a gander at Cygnus
A — the first time the instrument has looked at the galaxy since 1989. (Apparently astronomers spent so much VLA time observing the galaxy
in the 1980s that they didn’t feel the need to look again, Perley joked January 6th in his AAS presentation.) The new observations showed
a surprise: a new, secondary object just southwest of the central black hole. This object wasn’t in the 1989 radio image. Additional, higher-
resolution observations with the Very Long Baseline Array also picked up the object, clearly distinct from the galaxy’s nucleus. It’s roughly
1,300 light-years from the center.

The whatever-it-is is about twice as bright as the brightest known supernova at these frequencies. In fact, it’s much brighter than just about
any transitory radio signal known, except for accreting supermassive black holes and tidal disruption events, outbursts created when a black
hole eats a star.

The team scoured other archives and found the object in 2003 Keck infrared observations and, more iffily, in some images from Hubble.
(The object is so red that it doesn’t show up well at optical wavelengths, and in this range the space telescope’s resolution isn’t as
good as that of Keck’s adaptive optics.)

L3 magnet doors open, the ALICE experiment exposes its inner components to the (artificial) day light for the first time in years.
In the center, the beam pipe. On the left, the low-beta platform (visitors view point). On top, the crane used to move material
around the ALICE experimental area. The doors will be closed mid-April, in preparation for the 2017 beams.

https://phys.org/news/2017-01-role-supermassive-black-holes-galaxies.html

In roughly four billion years, the Milky Way will be no more.

Indeed, our home galaxy is on course to collide and unite with the Andromeda Galaxy, at present some two million light years away.
Of course, we don't notice that the two galaxies are drawing closer together. "To the human perspective, our galaxy doesn't appear
to be changing," says University of Iowa astrophysicist Hai Fu, "but in the history of the universe, it is changing all the time."
Galaxies have been merging for most of the universe's 13-billion-year history, and scientists have been observing these mergers for
some time. What they don't fully understand is how mergers occur.

Fu, an assistant professor in physics and astronomy, aims to clarify the phenomenon by observing supermassive black holes (with a mass
of about one billion suns), which are at the center of most galaxies. Astrophysicists believe large galaxies grow by devouring smaller
ones. In such cases, the black holes of both are expected to orbit each other and eventually merge. Fu and his team won a three-year,
$405,011 grant from the National Science Foundation to find and characterize these celestial events.

Fireball explodes near the Southern Cross over Puerto Rico, captured on January 12, 2017 by Frankie Lucena
Fireball Explodes near Southern Cross
https://www.youtube.com/watch?v=4KZmzPvkXzw

EVA live:
Proxima spacewalk live / Proxima / Human Spaceflight / Our Activities / ESA
http://www.esa.int/Our_Activities/Human_Spaceflight/Proxima/Proxima_spacewalk_live

NASA Television | NASA
https://www.nasa.gov/multimedia/nasatv/#public

A simple explanation of mysterious space-stretching ‘dark energy?’ | Science | AAAS
http://www.sciencemag.org/news/2017/01/simple-explanation-mysterious-space-stretching-dark-energy

For nearly 2 decades, cosmologists have known that the expansion of the universe is accelerating, as if some mysterious "dark energy" is blowing
it up like a balloon. Just what dark energy is remains one of the biggest mysteries in physics. Now, a trio of theorists argues that dark energy
could spring from a surprising source. Weirdly, they say, dark energy could come about because—contrary to what you learned in your high school
physics class—the total amount of energy in the universe isn't fixed, or "conserved," but may gradually disappear.

"It's a great direction to explore," says George Ellis, a theorist at the University of Cape Town in South Africa, who was not involved in the work.
But Antonio Padilla, a theorist at the University of Nottingham in the United Kingdom, says, "I don't necessarily buy what they've done."

Simulations suggest Planet Nine may have been a rogue
http://phys.org/news/2017-01-simulations-planet-rogue.html

Space researchers James Vesper and Paul Mason with New Mexico State University have given a presentation at this year's American Astronomical
Science meeting outlining the results of simulations they have been running to learn more about Planet Nine—a planet that many in the space
science community believe exists far beyond Pluto. They presented evidence suggesting that if Planet Nine is out there, it is likely a rogue.

"Do you know what the Milky Way is?"
Exploring space through a vintage cigarette card, courtesy of NY Public Library.