When the first astronauts aboard Orion will look back at the Earth, they will look into the windows, made mostly of plastic. As Orion was designed to perform missions in an open space with the participation of the people and even the ability to travel Mars in NASA decided it was time to replace the conventional glass windows with acrylic material, which is lighter, less expensive and more durable than glass stood before it, and more suitable for long-term missions. … [Read more...] about Orion capsule changes the glass windows on plastic