South Pole Wall

IN NEWS:

• Spectacular 3D maps of the universe have revealed one of the biggest cosmic structures ever found — an almost-inconceivable wall stretching 1.4 billion light-years.

About the structure:

• It is a cosmic wall stretching 1.4 billion light-years across and contains hundreds of thousands of galaxies, , along with huge amounts of gas and dust.
• It stretches across the southern border of the universe (from the perspective of Earth).
• Astronomers have long noticed that galaxies are not scattered randomly throughout the universe
• Along huge strands of hydrogen, galaxies collect into larger groupings of massive filaments, separated by giant voids of nearly empty space.
• Each filament is basically a wall of galaxies, stretching for hundreds of millions of light-years. They’re the biggest structures in the known universe.
• Other identified structures include the Great Wall, the Sloan Great Wall, the Hercules-Corona Borealis Great Wall, and the Bootes Void.
• Put together, these walls make up what astronomers call the cosmic web.

PRELIMS QUESTION

South Pole Wall, recently in news is :
(a)    A massive ice sheet in Antarctic threatened by climate change
(b)    A cosmic structure consisting of many galaxies.
(c)    A solar flare close to sun’s south Pole
(d)    A cluster of asteroids near Jupite

Answer to prelims question