jdreyer wrote on Oct 15, 2015, 16:10:
Who is it? Justin Bieber?
It is mysterious. I'm not saying it's aliens, but what could block up to 22% of a star's light? They've ruled out a protoplanetary disk. I'm sure it's something mundane like two planets colliding that left a big mess, and once we get the Webb telescope in orbit we'll fund out what it is. Remember that "face" on mars taken by Viking? When Mars Global Surveyor took a look at it, it turned out to be just another mountain.
If it was alien structures, they'd have to be massive, like millions and millions of square miles, to block that much light. It's almost inconceivable.
There was a discussion on reddit
, where it was said Jupiter would block 1% of our sun, and Earth 1/100th of 1%. There is some credence to dust clouds from comets, pulling in its own Oort cloud etc... but even those explanations were unusual.
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