Amr Abdallah Dalsh/Reuters
Solar Impulse 2, a solar powered plane piloted by Swiss aviator Andre Borschberg, is seen as it prepares to land while the ground crew follow on bicycles at Cairo Airport, Egypt on Wednesday.
© Garry Lotulung/Reuters
People watch a solar eclipse outside the planetarium in Jakarta, Indonesia on Wednesday
Sun Electric’s Chief Executive Officer Matthew Peloso (R) walks along rows of rooftop solar panels, operated under the company’s SolarSpace energy retail programme in Singapore
A view of Earth seen from the International Space Station (ISS) taken by current ISS crew member, Russian cosmonaut Mikhail Korniyenko
A picture taken by Solar Impulse 2 pilot Andre Borschberg shows a section of the solar powered plane as it flies over the Nagano mountain region in direction of Nagoya, Japan on Monday
The Swiss solar-powered plane Solar Impulse 2, HB-SIB, taking off with Swiss explorer Andre Borshberg on board for the third leg Ahmedabad to Varanasi, of the Round-The-World, in Ahmedabad, on Wednesday.
Solar Impulse 2, a solar-powered aircraft, takes flight as it begins its historic round-the-world journey from Al Bateen Airport, Abu Dhabi, on Monday
The solar observatory on Lomnicky Stit, in Slovakia’s High Tatras range, on Thursday. The station is one of five worldwide which observe emission spectral lines in the sun’s corona.
The world’s largest solar-powered boat, “MS Turanor PlanetSolar” sails through the Corinth Canal near the town of Corinth on Monday. The boat arrived to Greece as part of a joint archaeological project focused on underwater exploration off one of Europe’s oldest human occupation sites, the Franchthi cave in the Argolid, southeast Peloponnese
The experimental aircraft “Solar Impulse 2″, HB-SIB, during solar generator tests at an air base in Payerne, Switzerland, on Monday. The project aims to achieve the first circumnavigation of the world with an aircraft powered only by solar energy.
Solar Impulse, piloted by André Borschberg, takes flight during the second leg of the 2013 Across America mission at dawn on Wednesday from Sky Harbor International Airport in Phoenix, Arizona.
Stargazer delight: a man takes in the beautiful spectacle of the unusually clear night sky over Kielder Water, Northumberland, northeast England, on Tuesday