This is for a novel I'm writing. In it, the Earth has been separated from the Sun. At this point there is still an atmosphere (at perhaps 50% of normal pressure) but the temperature has fallen to somewhere around -150 centigrade. My question is this: Could a technologically savvy private citizen, after research, with a year's warning, build an insulated suit that would allow him to be outside for several hours? If so, what form would the suit take?