The sands of time are running out for the central star of this the Hourglass 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 and its core becomes a cooling, fading white dwarf. In 1995, astronomers used the Hubble Space Telescope to make a series of images of planetary nebulae, including the one above. Here, delicate rings of colorful glowing gas (nitrogen-red, hydrogen-green, and oxygen-blue) outline the tenuous walls of the 'hourglass.' The unprecedented sharpness of Hubble's images revealed surprising details of the nebula ejection process and may resolve the outstanding mystery of the variety of complex shapes and symmetries of planetary nebulae. Image Credit: NASA, WFPC2, HST, R. Sahai and J. Trauger (JPL) Read More
TI KOJI PROČITAŠ MOJ KAM, MOŽDA SI HODIO DO ZVIJEZDA. I VRATIO SE. JER TAMO NEMA NIŠTA DO PONOVO TI SAM. ČLOVJEK MOJŽE VIDJETI ONO TŠTO NIJE VIDIO, TČUTI ONO TŠTO NIJE TČUO, OKUSTI ONO TŠTO NIJE OTKUSIO, BIT TAMI GDJI NIJE BIO, ALI UVIJEK I SVAGDI, SAMO SEBE MOŽE NAJTI. ILI NE NAJTI. I MNOGO OT MOJE RUKE NA ZEMJI BI, A NI OT MENE NIKO NE BI MRTAV NI UBIT. I DA OSTAVIH KOSTI U TUJINI, I TAD BIH SAMO BOSNU SANJO.
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