A recurring rumor claims that on 27 August there will be a close encounter with Mars looking so large there will be two moons in the night sky.
Are We Headed for a Close Encounter with Mars?: Slide #5
Are We Headed for a Close Encounter with Mars?
The planet Mars not be making a once-in-our-lifetimes, remarkably close approach to Earth on 27 August
Are We Headed for a Close Encounter with Mars?