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Lone Planetary-Mass Object Found in Family of Stars

In 2011, astronomers announced that our galaxy is likely teeming with free-floating planets. In fact, these lonely worlds, which sit quietly in the darkness of space without any companion planets or even a host sun, might outnumber stars in our Milky Way galaxy. The surprising discovery begged the question: Where did these objects come from? Are they planets that were ejected from solar systems, or are they actually light-weight stars called brown dwarfs that formed alone in space like stars? WISEA 1147 is one of the few free-floating worlds where astronomers can begin to point to its likely origins as a brown dwarf and not a planet. 

Read the full story here:
http://www.nasa.gov/feature/jpl/lone-planetary-mass-object-found-in-family-of-stars

What is a brown dwarf?

Brown dwarfs are substellar objects with masses above those of planets but below those of even the lightest stars. They are not massive enough to sustain hydrogen-1 fusion reactions in their cores but depending on their mass some fuse deuterium and lithium. More information here:
https://en.wikipedia.org/wiki/Brown_dwarf

Image credit: A young, free-floating world sits alone in space in this illustration. The object, called WISEA J114724.10−204021.3, is thought to be an exceptionally low-mass "brown dwarf," which is a star that lacked enough mass to burn nuclear fuel and glow like a star. Astronomers using data from NASA's WISE and 2MASS sky surveys found the object in TW Hydrae – a young, 10-million-year-old association of stars. NASA/JPL-Caltech

#science   #astronomy  #space #browndwarf #WISEA1147   #wise   #2mass   #TWHydraeassociation   #planet   #star  
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#ﺍﻟـﺠـﻨـﺔ
ﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﺃﺭﺿﻬﺎ ﻭﺗﺮﺑﺘﻬﺎ..ﻓﻬﻲ ﺍﻟﻤﺴﻚ ﻭﺍﻟﺰﻋﻔﺮﺍﻥ
ﻭﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﺳﻘﻔﻬﺎ..ﻓﻬﻮ ﻋﺮﺵ ﺍﻟﺮﺣﻤﻦ.
ﻭﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﺑﻼﻃﻬﺎ..ﻓﻬﻮ ﺍﻟﻤﺴﻚ ﺍﻷﺫﻓﺮ.
ﻭﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﺣﺼﺒﺎﺋﻬﺎ..ﻓﻬﻮ ﺍﻟﻠﺆﻟﺆ ﻭﺍﻟﺠﻮﻫﺮ.
ﻭﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﺑﻨﺎﺋﻬﺎ..ﻓﻠﺒﻨﺔ ﻣﻦ ﻓﻀﺔ ﻭﻟﺒﻨﺔ ﻣﻦ ﺫﻫﺐ..ﻻ ﻣﻦ ﺍﻟﺤﻄﺐ ﻭﺍﻟﺨﺸﺐ.
ﻭﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﺃﺷﺠﺎﺭﻫﺎ..ﻓﻤﺎ ﻓﻴﻬﺎ ﺷﺠﺮﺓ ﺇﻻ ﻭﺳﺎﻗﻬﺎ ﻣﻦ ﺫﻫﺐ.
ﻭﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﺛﻤﺮﻫﺎ..ﻓﺄﻣﺜﺎﻝ ﺍﻟﻘﻼﻝ..ﺃﻟﻴﻦ ﻣﻦ ﺍﻟﺰﺑﺪ ﻭﺃﺣﻠﻰ ﻣﻦ ﺍﻟﻌﺴﻞ.
ﻭﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﻭﺭﻗﻬﺎ..ﻓﺄﺣﺴﻦ ﻣﺎ ﻳﻜﻮﻥ ﻣﻦ ﺭﻗﺎﺋﻖ ﺍﻟﺤﻠﻞ.
ﻭﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﺃﻧﻬﺎﺭﻫﺎ..ﻓﺄﻧﻬﺎﺭﻫﺎ ﻣﻦ ﻟﺒﻦ ﻟﻢ ﻳﺘﻐﻴﺮ ﻃﻌﻤﻪ..ﻭﺃﻧﻬﺎﺭ ﻣﻦ ﺧﻤﺮ ﻟﺬﺓ ﻟﻠﺸﺎﺭﺑﻴﻦ..ﻭﺃﻧﻬﺎﺭ ﻣﻦ ﻋﺴﻞ ﻣﺼﻔﻰ.
ﻭﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﻃﻌﺎﻣﻬﻢ..ﻓﻔﺎﻛﻬﺔ ﻣﻤﺎ ﻳﺘﺨﻴﺮﻭﻥ..ﻭﻟﺤﻢ ﻃﻴﺮ ﻣﻤﺎ ﻳﺸﺘﻬﻮﻥ.
ﻭﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﺷﺮﺍﺑﻬﻢ..ﻓﺎﻟﺘﺴﻨﻴﻢ ﻭﺍﻟﺰﻧﺠﺒﻴﻞ ﻭﺍﻟﻜﺎﻓﻮﺭ.
ﻭﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﺁﻧﻴﺘﻬﻢ..ﻓﺂﻧﻴﺔ ﺍﻟﺬﻫﺐ ﻭﺍﻟﻔﻀﺔ ﻓﻲ ﺻﻔﺎﺀ ﺍﻟﻘﻮﺍﺭﻳﺮ.
ﻭﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﺳﻌﺖ ﺃﺑﻮﺍﺑﻬﺎ..ﻓﺒﻴﻦ ﺍﻟﻤﺼﺮﺍﻋﻴﻦ ﻣﺴﻴﺮﺓ ﺃﺭﺑﻌﻴﻦ ﻣﻦ ﺍﻷﻋﻮﺍﻡ ﻭﻟﻴﺄﺗﻴﻦ ﻋﻠﻴﻪ ﻳﻮﻡ ﻭﻫﻮ ﻛﻈﻴﻆ ﻣﻦ ﺍﻟﺰﺣﺎﻡ.
ﻭﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﺗﺼﻔﻴﻖ ﺍﻟﺮﻳﺎﺡ ﻷﺷﺠﺎﺭﻫﺎ..ﻓﺈﻧﻬﺎ ﺗﺴﺘﻔﺰ ﺑﺎﻟﻄﺮﺏ ﻣﻦ ﻳﺴﻤﻌﻬﺎ.
ﻭﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﻇﻠﻬﺎ..ﻓﻔﻴﻬﺎ ﺷﺠﺮﺓ ﻭﺍﺣﺪﺓ ﻳﺴﻴﺮ ﺍﻟﺮﺍﻛﺐ ﺍﻟﻤﺠﺪ ﺍﻟﺴﺮﻳﻊ ﻓﻲ ﻇﻠﻬﺎ ﻣﺌﺔ ﻋﺎﻡ ﻻ ﻳﻘﻄﻌﻬﺎ.
ﻭﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﺧﻴﺎﻣﻬﺎ ﻭﻗﺒﺎﺑﻬﺎ..ﻓﺎﻟﺨﻴﻤﺔ ﻣﻦ ﺩﺭﺓ ﻣﺠﻮﻓﺔ ﻃﻮﻟﻬﺎ ﺳﺘﻮﻥ ﻣﻴﻼً ﻣﻦ ﺗﻠﻚ ﺍﻟﺨﻴﺎﻡ.
ﻭﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﻋﻼﻟﻴﻬﺎ ﻭﺟﻮ أﺳﻘﻬﺎ..ﻓﻬﻲ ﻏﺮﻑ ﻣﻦ ﻓﻮﻗﻬﺎ ﻏﺮﻑ ﻣﺒﻨﻴﺔ ﺗﺠﺮﻱ ﻣﻦ ﺗﺤﺘﻬﺎ ﺍﻷﻧﻬﺎﺭ.
ﻭﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﺍﺭﺗﻔﺎﻋﻬﺎ..ﻓﺎﻧﻈﺮ ﺇﻟﻰ ﺍﻟﻜﻮﺍﻛﺐ ﺃﻭ ﺍﻟﻐﺎﺭﺏ ﻓﻲ ﺍﻷﻓﻖ ﺍﻟﺬﻱ ﻻ ﺗﻜﺎﺩ ﺗﻨﺎﻟﻪ ﺍﻷﺑﺼﺎﺭ.
ﻭﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﻟﺒﺎﺱ ﺃﻫﻠﻬﺎ..ﻓﻬﻮ ﺍﻟﺤﺮﻳﺮ ﻭﺍﻟﺬﻫﺐ.
ﻭﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﻓﺮﺷﻬﺎ..ﻓﺒﻄﺎﺋﻨﻬﺎ ﻣﻦ ﺍﺳﺘﺒﺮﻕ ﻣﻔﺮﻭﺷﺔ ﻓﻲ ﺃﻋﻠﻰ ﺍﻟﺮﺗﺐ.
ﻭﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﺃﺭﺍﺋﻜﻬﺎ..ﻓﻬﻲ ﺍﻷﺳﺮﺓ ﻋﻠﻴﻬﺎ ﺍﻟﺒﺸﺨﺎﻧﺎﺕ..ﻭﻫﻲ ﺍﻟﺤﺠﺎﻝ ﻣﺰﺭﺭﺓ ﺑﺄﺯﺭﺍﺭ ﺍﻟﺬﻫﺐ..ﻓﻤﺎ ﻟﻬﺎ ﻣﻦ ﻓﺮﻭﺝ ﻭﻻ ﺧﻼﻝ.
ﻭﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﺃعمارهم..ﻓﺄﺑﻨﺎﺀ ﺛﻼﺛﺔ ﻭﺛﻼﺛﻴﻦ ﻋﻠﻰ ﺻﻮﺭﺓ ﺁﺩﻡ ﻋﻠﻴﻪ ﺍﻟﺴﻼﻡ ﺃﺑﻲ ﺍﻟﺒﺸﺮ.
ﻭﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﻭﺟﻮﻩ ﺃﻫﻠﻬﺎ ﻭﺣﺴﻨﻬﻢ..ﻓﻌﻠﻰ ﺻﻮﺭﺓ ﺍﻟﻘﻤﺮ.
ﻭﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﺳﻤﺎﻋﻬﻢ..ﻓﻐﻨﺎﺀ ﺃﺯﻭﺍﺟﻬﻢ ﻣﻦ ﺍﻟﺤﻮﺭ ﺍﻟﻌﻴﻦ..ﻭﺃﻋﻠﻰ ﻣﻨﻪ ﺳﻤﺎﻉ ﺃﺻﻮﺍﺕ ﺍﻟﻤﻼﺋﻜﺔ ﻭﺍﻟﻨﺒﻴﻴﻦ ﻭﺃﻋﻠﻰ ﻣﻨﻬﻤﺎ ﺳﻤﺎﻉ ﺧﻄﺎﺏ ﺭﺏ ﺍﻟﻌﺎﻟﻤﻴﻦ.
ﻭﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﻣﻄﺎﻳﺎﻫﻢ ﺍﻟﺘﻲ ﻳﺘﺰﺍﻭﺭﻭﻥ ﻋﻠﻴﻬﺎ..ﻓﻨﺠﺎﺋﺐ ﺃﻧﺸﺄﻫﺎ ﺍﻟﻠﻪ ﻣﻤﺎ ﺷﺎﺀ..ﺗﺴﻴﺮ ﺑﻬﻢ ﺣﻴﺚ ﺷﺎﺀﻭﺍ ﻣﻦ ﺍﻟﺠﻨﺎﻥ.
ﻭﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﺣﻠﻴﻬﻢ ﻭﺷﺎﺭﺗﻬﻢ..ﻓﺄﺳﺎﻭﺭ ﺍﻟﺬﻫﺐ ﻭﺍﻟﻠﺆﻟﺆ ﻋﻠﻰ ﺍﻟﺮﺅﻭﺱ ﻣﻼﺑﺲ ﺍﻟﺘﻴﺠﺎﻥ.
ﻭﺇﻥ ﺳﺄﻟﺖ ﻋﻦ ﻏﻠﻤﺎﻧﻬﻢ..ﻓﻮﻟﺪﺍﻥ ﻣﺨﻠﺪﻭﻥ ﻛﺄﻧﻬﻢ ﻟﺆﻟﺆ ﻣﻜﻨﻮﻥ

ﺍﻟﻠﻬﻢ.اجعلنا.ﻭﺃهلنا.ﻣﻦ.ﺃﻫﻠﻬﺎ.sy

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إذا كانت قدمك تترك أثراً في الأرض..فلسانك يترك أثراً في القلب...
هنيئاً لمن يحرص أن لا يظلم أحد..
ولا يغتاب أحد..
ولا يجرح أحد..
ولا يرى نفسه أفضل من أحد..
فكلنا راحلون..ويبقـــى الأثــر

🌹🌹🌹
.اللهم.ارزقنا.طيب.الصحبة.وصفاء.النفس.وحسن.الخاتمة.sy

#مســـاء #الخيـــر
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IC 417 - The Spider Nebula

In this infrared composite image taken by NASA's Spitzer Space Telescope and the Two Micron All Sky Survey (2MASS) you can see IC 417, the Spider Nebula. It is located in the constellation of Auriga (The Charioteer, https://goo.gl/NT8YKH), about 10,000 light-years away from Earth.

The Spider Nebula is a site of ongoing star formation (https://goo.gl/Mn2Zxf), at the top of the image you can see a large cluster of young stars called Stock 8.

In the image, infrared wavelengths, which are invisible to the unaided eye, have been assigned visible colors. Light with a wavelength of 1.2 microns, detected by 2MASS, is shown in blue. The Spitzer wavelengths of 3.6 and 4.5 microns are green and red, respectively.

More information here:
http://www.nasa.gov/feature/jpl/a-space-spider-watches-over-young-stars

More on the Spitzer Space Telescope and the Two Micron All Sky Survey:
http://www.spitzer.caltech.edu/
https://en.wikipedia.org/wiki/Spitzer_Space_Telescope
http://www.ipac.caltech.edu/2mass/
https://en.wikipedia.org/wiki/2MASS

Image credit: PIA20357: The Spider Nebula NASA/JPL-Caltech/2MASS http://goo.gl/rM3xrS

My Astronomy/Astrophysics collection recently surpassed 140,000 followers, I would have never expected that much interest, thanks to all of you! If you haven't already, maybe also try my Space/Space Technology collection here https://goo.gl/5KP0wx , or circle me +Pierre Markuse to get all of my posts which usually are science-related.

#science   #astronomy   #spidernebula   #ic417   #spitzerspacetelescope   #2mass   #space   #starformation   #infrared  
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