Pal Hermansen / Composite of flying butterflies (Lepidoptera) on sphere.

Dong Lei / Kawakarpo Mountain, view to summit with drifts of snow and the moon setting, Meri Snow Mountain National Park, Yunnan Province, China. May 2010.

Charlie Summers,Charlie Summers / Jupiter and the Moon in conjunction, on the night of 21 January 2013.

Oriol Alamany / Total eclipse of the sun at totality. Palmer River, Queensland, Australia, November 14, 2012.

Paul D Stewart / Aerial view of Grand Prismatic thermal spring in Yellowstone National Park, USA. The bright colours are natural, coming from thermophile bacteria in the water. People can be seen walking on the raised...

Ben Lascelles / The 'Perigree Super-moon'. A supermoon is the coincidence of a full moon with the closest approach the Moon makes to the Earth on its elliptical orbitis resulting in it appearing up to 14% larger and...

Charlie Summers / The transit of Venus across the face of the sun, with visible sunspots, as seen from Aurora, Colorado, USA, 19.51 local time, 5 June 2012.

Charlie Summers / An orbital presentation of the eclipse of the moon as seen from Aurora, Colorado, USA, on the evening of December 20, 2010 and the early morning of December 21, 2010. Composite

Aflo / Y-11404 View of Planet Earth above Moon

Tim Laman / The moon, one or two days after full. Caroni Bird Sanctuary, Trinidad, Trinidad and Tobago. 14th February 2006

Inaki Relanzon / Long exposure of stars above a rock bridge in the Eastern Pyrenees. Alta Cerdanya, Languedoc-Roussillion, France

Niall Benvie / A conceptual picture of Global warming illustrated through a model of the earth with a sign at the North Pole saying "Danger, Thin Ice".