My view is that if your philosophy is not unsettled daily then you are blind to all the universe has to offer.
— Neil deGrasse Tyson
Find out what the universe has to offer by checking out the reboot of the classic book and television series, Cosmos by Sagan. Is Neil deGrasse Tyson replacing Sagan as the new Mr. Universe? He demoted Pluto and is the author some great books. He also wrote the introduction to the new edition of Cosmos and is the host of the new series. He gets my vote. Brains and humor are an unbeatable combination in my book.
Brian Greene is one of my other candidates. He's the author of many excellent and mind-blowing books. Don't miss the chance to attend online classes at World Science U – FOR FREE! Brian Greene is teaching classes there.
Last but not least, is Alan Lightman. Alan Lightman is the author of an old favorite, Einstein's Dreams. I'm currently enjoying his new book The Accidental Universe.