The Milky Way, our galaxy, is a magnificent sight in the night sky, but we know surprisingly little about it for certain. What is its shape? How many stars does it actually contain? What lies at its centre? The Gaia space telescope will answer these questions, being armed with the most advanced camera to leave our planet, and it will allow us to see our galaxy as we've never seen it before. The Sky at Night visits the factory in Chelmsford that made the astonishing sensor at the heart of the mission.

David the filmmaker is 40 years old, but he still doesn't feel like a man - not a real man anyway. When his wife becomes pregnant with a boy, David's manhood insecurities deepen. How can he bring his son into manhood if he feels so estranged from his own? This question sets him off on a quest for his manhood that leads him from voice lessons to a men's group to deer-hunting, and ultimately back to his own father. My Own Man is an intimate, humorous, and emotional account of one man's search for what it means to be a man and a father in the 21st century.

New technologies are making rockets cheaper and more powerful than ever before. As companies like SpaceX and Virgin Galactic make space more accessible, and NASA returns to crewed spaceflight, a new era of space exploration may be on the horizon.

D-Day: As It Happens is a 24-hour history event to be broadcast across TV, web, mobile devices and social media, telling the story of this pivotal event in 20th-century history in a completely new way. Using newly-analysed archive footage, viewers can track the progress of seven people who were there on the day, each of them a real participant in the 1944 invasion. And they can do so moment by moment in real time, encountering the twists and turns of the fighting at the same time as the D-Day seven did, and learning their fate as the action unfolds in parallel with the present, Narrated by Peter Snow, with Channel 4 presenter and former marine Arthur Williams, and experts including former British Army officer Colonel Tim Collins and front-line journalist Lorna Ward. The second programme reveals what happened to the seven real people the event is following in real time, and also rounds up the events of D-Day.

These scientists are part of a global race. It's been running for over a decade... to build a mythical machine, the holy grail of calculations - a quantum computer. Remarkably, first-generation quantum computers have started to appear. Indeed, earlier this year, Google bought one. The D-Wave 2.

An engineering revolution is underway. Driven by dedicated individuals who are building extraordinary machines that will change our lives.
The first episode follows the race to generate vast power from thin air - the wind. One of the world’s biggest wind farms is being built off the English coast where the harsh conditions pose great challenges for the team. Meanwhile, a Norwegian team is striving to build the first-ever floating wind farm.