NASA: August 11, 2015: There is so much beyond this Earth that is still a mystery to people around the world. Time to time many amazing pictures have been taken by our scientists which show us the beauty of some unexplained secrets in space.
On Tuesday, an exceptionally beautiful image of a planetary nebula was captured by NASA’s Hubble telescope that is roughly 6,000 light-years away from Earth.
This bright and colorful cloud of dust and gas is just half a light year across which is massive when compared to us but is tiny for the nebula.
This planetary nebula, named NGC 6818 is also known as “Little Gem Nebula” and is found in the constellation Sagittarius. We can see some makeovers in its image that is probably because of color filters.
Two layers of gas along with dust can be seen in the picture of this little gem. The outer region is spherical and the inner part is vase-shaped & is also a bit brighter.
It shows knotty filament like structure having different layers, with a bright and enclosed central bubble encircled by a larger cloud.
When the stars are in their dismissal stage, they tend to shed their outer layers, which are in the form of gas, into space. These gases form glowing clouds that have very complex shapes with uneven mass. These loose spheres of gas around the star are called the planetary nebula.
According to scientists, the elongated shape of NGC 6818 is due to the stellar wind coming from the central star that smashes through the slower moving cloud and creates bright blowouts at the outer layers of the bubble.
This nebulae was last viewed by Hubble in 1997 using Wide Field Planetary Camera 2 using a mix of filters. The current image is taken from the same camera with different filters.