Poor Commander Hadfield. Without that wondrous zero gravity environment to work in, Earth has become a rather boring place.

Tonight at 7:08 ET, Commander Chris Hadfield – one of the most charismatic Commanders in the history of the International Space Station – will return to Earth. For the last five months, his steady stream of tweets, photographs and videos have been a source of inspiration, education and entertainment for millions around …

Tomorrow, Commander Chris Hadfield bids farewell to the International Space Station, meaning we won't get our usual dose of his tweets and videos sent from space. But he's signing off with a little David Bowie.

On late Thursday, "a very steady stream of flakes" was spotted drifting away from the space station — an apparent ammonia leak. The crew isn't in any danger, but an emergency spacewalk is being planned to inspect and fix it.

I just cannot get enough of astronaut Chris Hadfield. Above is his brand new video from aboard the International Space Station, in which he has fun expelling oxygen from an expired quick-don mask tank. And sings.

The Galápagos Islands look downright stunning from low-Earth orbit.

Yet another extraordinary image from Chris Hadfield. This gorgeous shot shows a darkened Southeastern United States just before dawn, with the moon bringing the new day with it. In a new video, Hadfield explains how he takes these marvellous photos.

With the help of Commander Chris Hadfield aboard the ISS, the Bank of Canada yesterday launched its new robot- and astronaut-themed five dollar bill. Hadfield had been keeping the new bill under wraps for months.

A little too close for comfort? A tiny space rock, or possibly a piece of space junk, has ripped through the International Space Station's solar array, narrowly missing the hull.

This is just excellent. ISS Commander Chris Hadfield was recently asked by high school students Kendra Lemke and Meredith Faulkner to demonstrate what happens when you wring out a waterlogged washcloth in space.