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Janos Haits

Extreme Science - 0 views

www.extremescience.com/...home

extreme technology education reference Astronomy physics space cosmology planetary science

shared by Janos Haits on 04 Feb 11 - Cached
  • Janos Haits on 04 Feb 11
     
    Extreme Science is the place online to find the biggest, baddest, and the best in the world of extremes and learn about the science behind what makes each the most extreme example of its kind. Here you'll find world records in natural science, including earth science and the plant and animal kingdom. Not only will you find out who holds the records, but also key science concepts used to explain the story behind the record.
Kalyan Roy

Why Are Quark Stars So Strange? : Discovery News - 1 views

news.discovery.com/...re-quark-stars-so-strange.html

Astronomy

shared by Kalyan Roy on 20 Jan 10 - Cached
  • First things first, neutron stars, quark stars and black holes are all born via the same mechanism: a supernova. But each of the three are progressively more massive, so they originate from supernovae produced by progressively more massive stars. So, what if a star exploded, producing something a little too massive to be called a neutron star? Well, neutron stars resist collapsing under their own gravitational pull by a characteristic of matter known as neutron degeneracy. This produces an outward force called neutron degeneracy pressure. What if the neutron star born after a supernova is too massive for this neutron degeneracy pressure to hold up against the neutron star's own gravity? In this case, it's up to the quarks that make up the neutrons to take over, preventing the body from collapsing any further. Single neutrons are composed of three quarks (two "down" quarks and one "up" quark). When quark degeneracy pressure kicks in, a quark star may be produced; the free "up" and "down" quarks get converted into "strange" quarks. Therefore, a quark star (also known as a "strange star") is made up of strange matter.
  • Using what we know from the Standard Model of particle physics, a massive quark star may have enough gravitational energy to start 'burning' strange matter. The quarks inside the core of the quark star may be abused so badly by gravitational pressure that the quarks will be converted into pure energy and neutrinos.
  • The fascinating thing with this scenario is that the quark star matter will be so dense that even the neutrinos cannot escape. However, this release of energy and generation of neutrinos creates an outward pressure countering the relentless inward gravitational pull.
  • ...2 more annotations...
  • Dai calls this extreme strange matter-burning quark star an "electroweak star"
  • Saving the best till last, the electroweak star's core would therefore be as extreme as the universe was only 10-10 seconds (that's 0.0000000001 seconds) after the Big Bang. These extreme objects would be like mini-Big Bang laboratories, maintaining a pressure where the electromagnetic and weak forces are so intertwined, they cannot be distinguished.
Matti Narkia

NASA - Extreme Gamma-ray Burst - 0 views

science.nasa.gov/...20feb_extremegrb.htm

2009 February NASA astronomy gamma-ray burst gamma-ray burst extreme gamma-ray_burst video

shared by Matti Narkia on 22 Feb 09 - Cached
  • Matti Narkia on 22 Feb 09
     
    February 20, 2009: The first gamma-ray burst to be seen in high-resolution from NASA's Fermi Gamma-ray Space Telescope is one for the record books. The blast had the greatest total energy, the fastest motions and the highest-energy initial emissions ever seen.
Maluvia Haseltine

GEMS mission to explore the polarized universe - 0 views

www.physorg.com/news168623210.html

Astronomy Astrophysics

shared by Maluvia Haseltine on 04 Aug 09 - Cached
  • Maluvia Haseltine on 04 Aug 09
     
    An exciting new astrophysics mission led by NASA's Goddard Space Flight Center in Greenbelt, Md., will provide a revolutionary window into the universe. Named the Gravity and Extreme Magnetism Small Explorer (GEMS), the satellite will be the first to systematically measure the polarization of cosmic X-ray sources.
Sandra Flores

Archaeology in the universe - 0 views

image

started by Sandra Flores on 30 Oct 14 no follow-up yet
Astro Biology

Extreme Ultraviolet Image of a Significant Solar Flare - 0 views

www.astrobio.net/...e-of-a-significant-solar-flare

origin of life on earth nasa solar system planets in our news from

shared by Astro Biology on 21 Oct 14 - No Cached
  • Astro Biology on 21 Oct 14
     
    The sun emitted a significant solar flare which is classified as an X1.1-class flare. X-class denotes the most intense flares, while the number provides more information about its strength.
  • Astro Biology on 21 Oct 14
     
    The sun emitted a significant solar flare which is classified as an X1.1-class flare. X-class denotes the most intense flares, while the number provides more information about its strength.
Sandra Flores

Life will Always find a Way ??? - 0 views

Age Mild universeIf you follow the calculations of Piran and Jimenez, the universe is so mild in old age. About five billion years gamma-ray bursts were so frequent that they had never allowed the ...

started by Sandra Flores on 05 Jan 15 no follow-up yet
Sandra Flores

Periodic Table of Elements completed ? - 0 views

Is the Periodic Table of Elements wholly or could it still be unknown elements in the universe?In the periodic table of the elements, the chemical elements are listed according to their atomic numb...

started by Sandra Flores on 05 Jan 15 no follow-up yet
Sandra Flores

Pictures of Exoplanets - 0 views

Are there direct pictures of exo-planets?It has exoplanets in a few cases with observations already able to prove directly, but if you can actually call the "photos" of exoplanets these recordings,...

started by Sandra Flores on 05 Jan 15 no follow-up yet
Sandra Flores

Periodic Table of Elements completed ? - 0 views

Is the Periodic Table of Elements wholly or could it still be unknown elements in the universe?In the periodic table of the elements, the chemical elements are listed according to their atomic numb...

started by Sandra Flores on 09 Jan 15 no follow-up yet
Sandra Flores

Pictures of Exoplanets - 0 views

Are there direct pictures of exo-planets?It has exoplanets in a few cases with observations already able to prove directly, but if you can actually call the "photos" of exoplanets these recordings,...

started by Sandra Flores on 09 Jan 15 no follow-up yet
Sandra Flores

Life will Always find a Way ??? - 0 views

Age Mild universeIf you follow the calculations of Piran and Jimenez, the universe is so mild in old age. About five billion years gamma-ray bursts were so frequent that they had never allowed the ...

started by Sandra Flores on 09 Jan 15 no follow-up yet
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