The sands of time are running out for the central star of this hourglass-shaped planetary nebula. With its nuclear fuel exhausted, this brief, spectacular, closing phase of a Sun-like star's life occurs as its outer layers are ejected - its core becoming a cooling, fading white dwarf. In 1995, astronomers used the Hubble Space Telescope (HST) to make a series of images of planetary nebulae, including the one above. Here, delicate rings of colorful glowing gas (nitrogen-red, hydrogen-green…

The sands of time are running out for the central star of this hourglass-shaped planetary nebula. With its nuclear fuel exhausted, this brief, spectacular, closing phase of a Sun-like star's life occurs as its outer layers are ejected - its core becoming a cooling, fading white dwarf. In 1995, astronomers used the Hubble Space Telescope (HST) to make a series of images of planetary nebulae, including the one above. Here, delicate rings of colorful glowing gas (nitrogen-red, hydrogen-green…

The Pillars of Creation Nebula - Twenty years after the initial iconic photo was taken, the Hubble telescope returns for a high-def shot.

The Pillars of Creation Nebula - Twenty years after the initial iconic photo was taken, the Hubble telescope returns for a high-def shot.

Hubble Space Telescope - The Helix Nebula in the constellation of Aquarius about 700 light-years away, spanning about 0.8 parsecs - 2.5 light-years

Hubble Space Telescope - The Helix Nebula in the constellation of Aquarius about 700 light-years away, spanning about 0.8 parsecs - 2.5 light-years

For more of the greatest collection of #Nebula in the Universe... For more of the greatest collection of #Nebula in the Universe visit http://ift.tt/20imGKa nebula nebulae nasa space astronomy horsehead nebula carina nebula http://ift.tt/1Qb6hmh

For more of the greatest collection of #Nebula in the Universe... For more of the greatest collection of #Nebula in the Universe visit http://ift.tt/20imGKa nebula nebulae nasa space astronomy horsehead nebula carina nebula http://ift.tt/1Qb6hmh

Is Our Universe Really 'Slip Slidin Away'? http://www.huffingtonpost.com/dr-sten-odenwald/is-our-universe-really-sl_b_5883170.html?ncid=txtlnkusaolp00000592

Is Our Universe Really 'Slip Slidin Away'? http://www.huffingtonpost.com/dr-sten-odenwald/is-our-universe-really-sl_b_5883170.html?ncid=txtlnkusaolp00000592

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