T H I R D E Y E # 1
"I SEE YOU GRINNING IN THE DARKNESS EVERYTIME THEY TAKE A PIECE OF MY HEART."
Kimmo Savolainen (Finnish, b. 1974, Siilinjärvi, Finland) - Silent Forest, New Zealand, 2011 Photography
Kepler’s Supernova Remnant in X-Rays
Credit: NASA/CXC/NCSU/S. Reynolds et al.
Explanation: What caused this mess? Some type of star exploded to create the unusually shaped nebula known as Kepler’s supernova remnant, but which type? Light from the stellar explosion that created this energized cosmic cloud was first seen on planet Earth in October 1604, a mere four hundred years ago. The supernova produced a bright new star in early 17th century skies within the constellation Ophiuchus. It was studied by astronomer Johannes Kepler and his contemporaries, with out the benefit of a telescope, as they searched for an explanation of the heavenly apparition. Armed with a modern understanding of stellar evolution, early 21st century astronomers continue to explore the expanding debris cloud, but can now use orbiting space telescopes to survey Kepler’s supernova remnant (SNR) across the spectrum. Recent X-ray data and images of Kepler’s supernova remnant taken by the orbiting Chandra X-ray Observatory has shown relative elemental abundances more typical of a Type Ia supernova, indicating that the progenitor was awhite dwarf star that exploded when it accreted too much material and went over Chandrasekhar’s limit. About 13,000 light years away, Kepler’s supernova represents the most recent stellar explosion seen to occurwithin our Milky Way galaxy.
Head of a Lady in Medieval Costume (detail), Lucien Victor Guirand de Sccevola, 1900
Astronomers have discovered the largest known structure in the universe, a clump of active galactic cores that stretch 4 billion light-years from end to end. The structure is a light quasar group (LQG), a collection of extremely luminous Galactic Nulcei powered by supermassive central black holes.