Overhead expanse

This crossword clue is for the definition: Overhead expanse.
it’s A 16 letters crossword puzzle definition.
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Possible Answers: SKY.

Last seen on: LA Times Crossword 8 Nov 2017, Wednesday


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Random information on the term “SKY”:

Outer space, or just space, is the expanse that exists between celestial bodies, including Earth. Outer space is not completely empty, but consists of a hard vacuum containing a low density of particles, predominantly a plasma of hydrogen and helium as well as electromagnetic radiation, magnetic fields, neutrinos, dust, and cosmic rays. The baseline temperature, as set by the background radiation from the Big Bang, is 2.7 kelvins (K) (−270.45 °C; −454.81 °F). Plasma with a number density of less than one hydrogen atom per cubic metre and a temperature of millions of kelvins in the space between galaxies accounts for most of the baryonic (ordinary) matter in outer space; local concentrations have condensed into stars and galaxies. Observations indicate that 90% of the mass in most galaxies is in an unknown form, called dark matter, which interacts with other matter through gravitational but not electromagnetic forces. Other observations indicate that the majority of the mass-energy in the observable universe is a poorly understood vacuum energy of space which astronomers label dark energy. Intergalactic space takes up most of the volume of the Universe, but even galaxies and star systems consist almost entirely of empty space.

SKY on Wikipedia