The blue LED can also trace its history back to the 1970s. These were initially developed by RCA with a view to making a slimline TV, and although a blue LED was developed, it wasn't bright enough ...

The last time a super blue moon appeared was Jan. 31, 2018, and the next won’t occur until Jan. 31, 2037, NASA ambassador Tony Rice told The Washington Post.

A rare super blue moon will light up the sky on Monday, Aug. 19. It's a rarity of sorts, according to NASA, since the celestial event will showcase a supermoon and a blue moon.