Mercury is the closest planet to the sun. Mercury is the closest planet to the sun. It has no atmosphere and is, as such, covered in craters. It's also incredibly hot but, surprisingly, has water ice ...

Forty-eight episodes, more than eight hours of content, 100,000 words, a year and a half of work, topics ranging from quantum fluctuations to the death of the Universe, and 12 million views … finally, ...

Before saying anything else, can we all please take a moment and savor the fact that Episode 42 of Crash Course Astronomy is all about how the Universe and everything got started? Lovely. So, yes, ...

Binary stars are gravitationally bound together in the same system. Double stars are stars that appear to be near each other in the sky, but if they’re gravitationally bound together we call them ...

Astronomy isn’t just for “Big Bang Theory” enthusiasts. But unfortunately, so many of us take for granted the endless swath of protection and ever-changing colors and shapes over our heads, until ...

Against all odds, this new show is going to make you love physics. After the Green brothers ended their much-beloved Crash Course Astronomy series in January, fans wondered what subject the duo would ...