Astronomy, cosmology and space thread

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Re: Astronomy, cosmology and space thread

Post by hhfarang » Sat Dec 24, 2016 10:49 pm

"Six more fast radio bursts have been discovered coming from the same mystery cosmic source

Repeating FRBs came from same location far beyond the Milky Way where 10 had previously been detected. ..."

http://www.ibtimes.co.uk/six-more-fast- ... yptr=yahoo
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Re: Astronomy, cosmology and space thread

Post by buksida » Thu Feb 02, 2017 11:19 am

Making you feel small ...

Taking the Measure of Nothing in the Universe
Scale-of-the-Universe.jpg
http://blogs.discovermagazine.com/outth ... JKy8Bt96Ul
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Re: Astronomy, cosmology and space thread

Post by buksida » Thu Feb 23, 2017 9:10 am

Seven Alien 'Earths' Found Orbiting Nearby Star
Seven rocky planets orbiting a nearby star may be roughly the size of Earth and could even be right for water—and maybe life—to adorn their surfaces, researchers announced Wednesday.

The planets, which circle a star called TRAPPIST-1 just 39 light-years away, are tucked together so tightly that they routinely spangle each others’ skies, sometimes appearing as shimmering crescents and at other times as orbs nearly twice as large as the full moon.

“The spectacle would be beautiful,” says the University of Cambridge’s Amaury Triaud, coauthor of a study describing the otherworldly heptad that appears in the journal Nature.


http://news.nationalgeographic.com/2017 ... e-science/
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Re: Astronomy, cosmology and space thread

Post by hhfarang » Sat Mar 04, 2017 3:04 am

"NASA Considers Magnetic Shield to Help Mars Grow Its Atmosphere

Image

The Planetary Science Vision 2050 Workshop is happening right now at NASA headquarters in Washington DC. The workshop is meant to discuss ambitious space projects that could be realized, or at least started, by 2050.

One of the most enticing ideas came this morning from Jim Green, NASA's Planetary Science Division Director. In a talk titled, "A Future Mars Environment for Science and Exploration," Green discussed launching a "magnetic shield" to a stable orbit between Mars and the sun, called Mars L1, to shield the planet from high-energy solar particles. The shield structure would consist of a large dipole, or a pair of equal and oppositely charged magnets to generate an artificial magnetic field.

Such a shield could leave Mars in the relatively protected magnetotail of the magnetic field created by the object, allowing the Red Planet to slowly restore its atmosphere. About 90 percent of Mars's atmosphere was stripped away by solar particles in the lifetime of the planet, which was likely temperate and had surface water about 3.5 billion years ago.

Image

According to simulation models, such a shield could help Mars achieve half the atmospheric pressure of Earth in a matter of years. With protection from solar winds, frozen CO2 at Mars's polar ice caps would start to sublimate, or turn directly into gas from a solid. The greenhouse effect would start to fill Mars's thin atmosphere and heat the planet, mainly at the equator, at which point the vast stores of ice under the poles would melt and flood the world with liquid water.

"Perhaps one-seventh of the ancient ocean could return to Mars," said Green.
Image

This is some truly futuristic stuff, reminiscent of Kim Stanley Robinson's Red Mars trilogy. But it is theoretically possible, and it just might, maybe, be a step toward terraforming Mars for human inhabitation in the next century."

https://www.yahoo.com/news/nasa-conside ... 59524.html
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Re: Astronomy, cosmology and space thread

Post by prcscct » Sun Apr 09, 2017 5:49 am

The race to destroy space garbage

"Millions of pieces of man-made trash are now orbiting the Earth. Some are tiny, others are large enough to be seen with a telescope, but all pose a risk to space craft and satellites.

And according to experts the threat is growing as space becomes more and more crowded.

Some 23,000 pieces of space junk are large enough to be tracked by the US Space Surveillance Network. But most objects are under 10cm (4in) in diameter and can't be monitored. Even something the size of a paper clip can cause catastrophic damage."......

http://www.bbc.com/news/world-us-canada-39521406
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Re: Astronomy, cosmology and space thread

Post by prcscct » Sun Apr 23, 2017 3:10 am

Cassini probe heads towards Saturn 'grand finale'

"Cassini has used a gravitational slingshot around Saturn's moon Titan to put it on a path towards destruction.
Saturday's flyby swept the probe into an orbit that takes it in between the planet's rings and its atmosphere.
This gap-run gives the satellite the chance finally to work out the length of a day on Saturn, and to determine the age of its stunning rings.
But the manoeuvre means also that it cannot escape a fiery plunge into Saturn's clouds in September.".....


http://www.bbc.com/news/science-environment-39672263
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Re: Astronomy, cosmology and space thread

Post by hhfarang » Sat May 06, 2017 1:45 am

This will make you feel insignificant in the grand scheme of things...

"Countless galaxies billions of light-years away shine in new Hubble photo"

Image

https://www.yahoo.com/news/countless-ga ... 07583.html
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Re: Astronomy, cosmology and space thread

Post by hhfarang » Thu May 18, 2017 10:51 pm

"New ‘cold spot’ discovery could prove existence of a parallel universe

Image

Scientists believe they have moved a step closer to proving the existence of a parallel universe with the discovery of a mysterious ‘cold spot’.

This cool patch of space, that was first spotted by the NASA WMAP satellite in 2004, is part of the radiation that was thought to have been produced during the formation of the universe some 13 billion years ago.

However, research conducted by Professor Tom Shanks from Durham University has uncovered a new theory – that the Cold Spot was formed when universes COLLIDED.

Professor Shanks theorises that this is ‘the first evidence for the multiverse – and billions of other universes may exist like our own”. ..."

https://www.yahoo.com/news/new-cold-spo ... 51056.html
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Re: Astronomy, cosmology and space thread

Post by hhfarang » Thu May 18, 2017 10:58 pm

"Nasa: Humans Have Inadvertently Created Artificial Barrier Around Earth

NASA space probes have discovered an artificial barrier around Earth created through human activity—showing we are not only responsible for shaping the environment on land, but that we are now having an impact on space too.

The barrier, which comes and goes, is the result of very low frequency radio communications interacting with particles in space, which results in a sort of shield protecting Earth from high energy radiation in space.

This, scientists say, is potentially very good news, as we could use the barrier to protect Earth from extreme space weather resulting from events like coronal mass ejections—huge explosions on the sun, where plasmas and magnetic field are ejected from its corona, the outermost part of its atmosphere. These ejections can result in geomagnetic storms, which have the potential to knock out communication satellites and power grids. ..."

http://www.newsweek.com/nasa-barrier-ea ... her-611356
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