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Space Phenomenon

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CRAB NEBULA

This mosaic image, one of the largest ever taken by NASA's Hubble Space Telescope of the Crab Nebula, is a six-light-year-wide expanding remnant of a star's supernova explosion. 
The orange filaments are the tattered remains of the star and consist mostly of hydrogen. The rapidly spinning neutron star embedded in the center of the nebula is the dynamo powering the nebula's eerie interior bluish glow. The blue light comes from electrons whirling at nearly the speed of light around magnetic field lines from the neutron star. The neutron star, the crushed ultra-dense core of the exploded star, like a lighthouse, ejects twin beams of radiation that appear to pulse 30 times a second due to the neutron star's rotation. The colors in the image indicate the different elements that were expelled during the explosion. Blue in the filaments in the outer part of the nebula represents neutral oxygen, green is singly-ionized sulfur, and red indicates doubly-ionized oxygen.

Image Credit: NASA, ESA, J. Hester (Arizona State University)

 

RED BUTTERFLY

NASA’s Spitzer Space Telescope recently snapped an infrared image of a “red butterfly” in space and it’s a gorgeous sight with hundreds of baby stars.The “red butterfly” image is actually four images snapped by the telescope’s Infrared Array Camera (IRAC) during its prime mission, which shows the nebula’s glowing blue, green, orange, and red hues.

 

MILKY WAY

Turns out the Milky Way is aptly named, with the overall color of our galaxy resembling the shade of fine-grained spring snow in early morning light. 

Splitting the light into its component wavelengths, however, reveals a redder-than-average color for the Milky Way's core, and sky-blue spiral arms. 

Understanding the color of the Milky Way allows us to compare other galaxies to it because for most galaxies all we can measure is how bright they are and what color they are. It's really frustrating that that's exactly what we can't measure about the Milky Way from our position inside it," 

 

HOLY COW

Something strange happened in the sky one summer night in 2018, and astronomers are still trying to figure out exactly what occurred. But their telescopes were in the right position to capture a mysterious bright object flaring in the sky before it vanished. 

In mid-June, a cosmic flare was registered by astronomers using the ATLAS asteroid survey, or Asteroid Terrestrial-impact Last Alert System. The flare grew into a sudden burst of bright light from the direction of the dwarf spiral galaxy CGCG 137-068, 200 million light-years away in the Hercules constellation. In terms of galactic neighbors, that's relatively close to us, according to astronomers. 
    Then, the bright anomaly vanished as quickly as it arrived. 
    The Cocoon Nebula
    The Cocoon Nebula, like many nebulas, is an emission nebula, reflection nebula, and an absorption nebula.  Each one of these nebula has defining characteristics which is able to be seen within this picture.  The bluish color of the Cocoon Nebula is typical of the reflection nebulas which can be seen faintly on the edges of this picture.  The largest star in the center is most likely reflecting its light causing the blue color at the edge of this nebula.  This color is coming from carbon dust grains reflecting light from near by stars.  The red color is typical of emission nebulas and is ionized hydrogen gas.  Finally, the absorption nebula is one which are interstellar clouds blocking dust from being seen.  This accounts for dark areas within the nebula.  Note that in the dark areas all you are able to see faint red stars which remain red because all of their blue light has been reflected out already.  The blue light is reflected away from us if the interstellar clouds are blocking the dust and if the clouds are in the background the dust reflects toward us allowing us to see some blue color.

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