Searching for Skylab: Even the most casual astro-nerd will revel in this respectful elegy to unsung space history

Remember the space station so big you could fly a jet-pack inside?
Film review As NASA gears up to celebrate to 50 years since the first Moon landing, another anniversary is rolling around. It is 45 years since the last crew left Skylab and 40 since the station spread itself over a chunk of Australia.…