(Roughly) Daily

“Outer space is so empty”*…

 

At the furthest-most reaches of the observable universe lies one of the most enigmatic mysteries of modern cosmology: the cosmic microwave background (CMB) Cold Spot.

Discovered in 2004, this strange feature etched into the primordial echo of the Big Bang has been the focus of many hypotheses — could it be the presence of another universe? Or is it just instrumental error? Now, astronomers may have acquired strong evidence as to the Cold Spot’s origin and, perhaps unsurprisingly, no multiverse hypothesis is required. But it’s not instrumental error either…

The Cold Spot area resides in the constellation Eridanus in the southern galactic hemisphere. The insets show the environment of this anomalous patch of the sky as mapped using PS1 and WISE data and as observed in the cosmic microwave background temperature data taken by the Planck satellite. The angular diameter of the vast supervoid aligned with the Cold Spot, which exceeds 30 degrees, is marked by the white circles.

 

More at “Mysterious ‘Cold Spot’: Fingerprint of Largest Structure in the Universe?

* Theodore Sturgeon

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As we boldly go, we might recall that it was on this date in 1962 that NASA launched the Ranger 4, the first U.S. spacecraft to reach another celestial body.  Ranger 4 was designed to transmit pictures to Earth and to test the radar-reflectivity of the lunar surface during a period of 10 minutes of flight prior to crashing upon the Moon, “rough-landing” a seismometer capsule as it did.  In the event, an onboard computer glitch caused failure of the solar panels and navigation systems; as a result the spacecraft crashed on the far side of the Moon three days after it’s launch without returning any scientific data.  Still, the “landing” was a first.

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 Happy Shakespeare’s Birthday!

 

Written by LW

April 23, 2015 at 1:01 am

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