Tracy Caldwell Dyson
Tracy Caldwell Dyson realises there's no place like home as she peers down at Earth from the highest vantage point possible - space.
Staring out of the windows of the International Space Station (ISS), the astronaut takes in the planet in all its wonderful glory.
Orbiting our planet about 217 miles up, the ISS is high enough so that the Earth's horizon appears clearly curved.
Homesick: Astronaut Tracy Caldwell Dyson peers down at Earth from her vantage point of around 350 kilometres above our planet
A night-time photograph made by a crew member on the International Space Station Expedition shows a view of Sicily and the 'boot' of Italy
This dazzling image shows the bright lights of Cairo and Alexandria, Egypt, on the Mediterranean coast as well as the Nile River
ISS Astronauts during a space walk. Construction of the station began in 1998 and will finish next year
