Asterism

My Art DA

piia/22/femme/shiba inu

happily spark-bonded with kusu. ♥

somewhere between girly and tomboy.

minimalist.

space is my sanctuary.

♥ : dogs, sharks, mermaids, the sea, suits, painting

fan of : ganondorf, evangelion, turians

shychemist:

(Image: Okayama University/JAXA)

It’s like a cosmic version of Russian nesting dolls. Tiny dust grains collected from the surface of the asteroid Itokawa harbour even smaller particles and craters of their own - the scars of high-speed collisions with nanometre-sized impactors.

In 2010, Japan’s Hayabusa probe delivered more than 1500 rocky particles from Itokawa to Earth. Studies of some of the grains last year suggested that the 500-metre-long asteroid probably began its life as a much larger rock, measuring at least 20 kilometres across. Indeed, Itokawa has a very low density, suggesting it is a rocky rubble pile that probably coalesced after its parent body was smashed in an impact.

Now researchers led by Eizo Nakamura of Okayama University in Misasa, Japan, have revealed violence on an even smaller scale. Scanning electron microscope images of five dust grains, ranging from 0.04 to 0.11 millimetres wide, show even smaller particles stuck to the grains.

These are thought to be mostly shrapnel from neighbouring grains that were struck by high-speed space dust, and occasionally bits of the extra-asteroidal impactors themselves. Some grains also show miniature craters, where nanometre-sized impactors lodged into the grains, sometimes melting their immediate surroundings.

Understanding these processes sheds light on how the space environment “weathers” asteroids’ surfaces, which in turn may help researchers better estimate asteroids’ ages.

Journal reference: Proceedings of the National Academy of Sciences, DOI: 10.1073/pnas.1116236109

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#space  #science  #Astronomy  #dust  #grains  #microscope  #microscopic  #photo  #photography  #physics  #hayabusa  #itokawa  #asteroid  
Infrared Portrait of the Large Magellanic Cloud
Credit: ESA / NASA / JPL-Caltech / STScI

Explanation: Cosmic dust clouds ripple across this infrared portrait of our Milky Way’s satellite galaxy, the Large Magellanic Cloud. In fact, the remarkable composite image from the Herschel Space Observatory and the Spitzer Space Telescope show that dust clouds fill this neighboring dwarf galaxy, much like dust along the plane of the Milky Way itself. The dust temperatures tend to trace star forming activity. Spitzer data in blue hues indicate warm dust heated by young stars. Herschel’s instruments contributed the image data shown in red and green, revealing dust emission from cooler and intermediate regions where star formation is just beginning or has stopped. Dominated by dust emission, the Large Magellanic Cloud’s infrared appearance is different from views in optical images. But this galaxy’s well-known Tarantula Nebula still stands out, easily seen here as the brightest region to the left of center. A mere 160,000 light-years distant, the Large Cloud of Magellan is about 30,000 light-years across.

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#space  #Large Magellanic Cloud  #dust  #stars  #infrared  
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#space  #science  #astronomy  #nebula  #supernova  #stars  #cosmos  #deep space  #astrobiology  #cloud  #dust  #star dust  #gas  #hot gas  #planet  #solar system  #galaxy  #protostar  

misterspaceman:

Tangled Galaxies

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#space  #tangled  #galaxies  #galaxy  #stars  #dust  #gas  #red  #blue  #yellow  #beautiful  #chandra  #hubble  #spitzer  #cosmic  #starry  #dopeness  
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#space  #science  #astronomy  #nebula  #supernova  #stars  #cosmos  #deep space  #astrobiology  #cloud  #dust  #star dust  #gas  #hot gas  #planet  #solar system  #galaxy  #protostar  
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#space  #science  #astronomy  #nebula  #supernova  #stars  #cosmos  #deep space  #astrobiology  #cloud  #dust  #star dust  #gas  #hot gas  #planet  #solar system  

boyastronomer:

The Great Orion Nebula imaged in infrared light by the Spitzer Space Telescope.

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#space  #Astronomy  #Orion  #Nebula  #Orion Nebula  #Emission Nebula  #Gas  #Dust  #Stars  #Star  #Colors  #Green  #Yellow  #Infrared  #Spitzer  #Space Telescope  

spacep0rn:

Clouds of dust and gas in the Elephant’s Trunk nebula.

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#Nebula  #Elephant's trunk nebula  #dust  #gas  #space  #spaceporn  

bonedust:

Ghost

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#nebula  #dust  #interstellar dust  #cosmos  #science  #astronomy  #nasa  

emptyspaceblog:

glitter falls

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#waterfall  #electricity  #neon  #glitter  #pink  #purple  #electric  #gas  #clouds  #fairy  #dust