splitmind19 posted on instagram


IRAS 20324: Evaporating Protostar 
Image Credit: NASA, ESA, Hubble Heritage Team (STScI/AURA), and IPHAS
Will this caterpillar-shaped interstellar cloud one day evolve into a butterfly-shaped nebula? No one is sure. What is sure is that IRAS 20324+4057, on the inside, is contracting to form a new star. On the outside, however,energetic winds are blowing and energetic light is eroding away much of the gas and dust that might have been used to form the star. Therefore, no one is sure what mass the resulting star will have, and, therefore, no one knows the fate of this star. Were the winds and light to whittle the protostar down near the mass of the Sun, the outer atmosphere of this new star may one day expand into a planetary nebula, possibly even one that looks like a butterfly. Alternatively, if the stellar cocoon retains enough mass, a massive star will form that will one day explode in a supernova. The eroding protostellar nebula IRAS 20324+4057 spans about one light year and lies about 4,500 light years away toward the constellation of the Swan (Cygnus). The above image of IRAS 20324+4057 was taken with the Hubble Space Telescope in 2006 but released last week. The battle between gravity and light will likely take over 100,000 years to play out, but clever observations and deductions may yet yield telling clues well before that.
#space #stellar #stars #nasa #iss #galaxy #galaxies #hubble #spitzer #telescope #planets #universe #milkway #nebula #cosmic #comet #ESA #ESO #saturn #mars #venus #neptune #moons #orion #pulsar #supernova by splitmind19

le_moishe posted on instagram


#Repost @nasa with @repostapp.
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Enceladus looks as though it is half lit by sunlight in this view from NASA’s Cassini spacecraft, but looks can be deceiving. The area on the right, where surface features can be made out, are actually illuminated by light reflected off of Saturn. A sliver of surface illuminated by direct sunlight is visible on the left.

Images like this one are designed to capture the extended plume of icy material spraying from the moon’s south polar region. Such images need to be taken with Cassini looking toward the icy moon’s night side, since the small particles in the plume are most easily seen when backlit by the sun.

This view looks toward the leading hemisphere of Enceladus and was taken in visible light with Cassini’s narrow-angle camera on May 10, 2015. Enceladus is 313 miles (504 kilometers) across.

Credit: NASA/JPL-Caltech/Space Science Institute
#Saturn #cassini #cassinisaturn #nasa #space #planet #astronomy #science by le_moishe