NEIL DEGRASSE TYSON

On Wednesday, U.S. President Barack Obama did something that helped him reach and communicate with millions of people directly. The President spent around half-an-hour on the popular link-sharing website Reddit, answering questions from the general public and became the first ever sitting president to participate in a forum, commonly referred to as an AMA or "ask me anything."

Manhattanhenge -- that magical, periodic confluence of golden sunlight and New York steel -- is approaching. Read on to learn how to see this modern miracle for yourself on Tuesday and Wednesday.

China's space program remains far behind the U.S. in sophistication and technological advancement, but this summer the People's Republic is expected to carry out another two historic firsts. The summer 2012 mission is predicted to make history by sending China's first female astronaut into space and will be China's first manned space docking.

The re-release of James Cameron's 1997 blockbuster, Titanic hits theaters April 4. Fans of the movie might be surprised that Cameron made a change to the end of the film...a very big one.

Noted physicist and professor Stephen Hawking is set to make a guest appearance next month on the hit CBS sitcom The Big Bang Theory.

In a newly-minted internet meme, Neil deGrasse Tyson looks kind of defensive. Or possibly confused. Or is he dismissive?

Astronomers are closer to uncovering a blueprint of the cosmos after finding islands of cold gas and mysterious microwaves and for the first time map out carbon dioxide through the universe.

A stranded Russian science satellite, loaded with rocket fuel for a roundtrip mission to Mars, is expected to plunge back to Earth on Sunday, but officials said on Friday they don't know when or where it will hit.

Neil deGrasse Tyson is no stranger to questions on space and the universe. The acclaimed American astrophysicist spent his Sunday answering questions online, but from an unlikely source - Reddit users.

MacFarlane and Ann Druyan, Sagan?s widow, hit on the idea of making the series again to reignite layman interest in science

The term “Manhattanhenge” was created by astrophysicist Neil deGrasse Tyson in 1996 at the American Museum of Natural History, who noticed how similar it was to the way the sun sets in Stonehenge.

On the Memorial Day evening, did you encounter the beautiful Manhattanhenge? If not, here is your second, and better chance.