could it be an alien civilisation?

[Diego Pigozzo]

Almost certainly not, yet quite interesting.
http://www.theatlantic.com/science/archive/2015/10/the-most-interesting-star-in-our-galaxy/410023/

[Otto Phocus]

The flash of light you saw in the sky was not an alien civilization. Swamp gas from a weather balloon was trapped in a thermal pocket and reflected the light from Venus.

Now if you would kindly look at this pen I am holding.....