abstract air atmosphere background blue cirrus clouds cumulus fading formation global warming gradient graphic heavens illustration ozone ozone layer pretty rain science skies sky spring stratus vector water weather white bright brilliant cloud colorful colourful contrast dark darkening dramatic dusk evening fiery flaming gold glory golden light lighting moody setting sun shadows shining silhouette silhouettes spreading sun sunset bank bridge calm England english footbridge Great Britain green peaceful placid plant quality reflection relaxing restful river riverside shade shadow summer sunlight Sussex tranquil tree umbellifer vegetation bridleway countryside exercise farmland fence field footpath landscape long distance meadow November path real estate rural South Downs track trail view walk winter canada canoeists canoes cold danger exposed glorious lake mountain natural nature radiance radiant ripples Rockies Rocky Mountains storm stormy threatening violent vulnerable blue sky country daylight large tree outdoors sunny tree trunk white clouds appearance cloudy craters distance distant glowing half-moon heavenly hidden moon moonscape orbit orbiting out-of-shape partial phases shape shapes southern sky alien birds concept fly futuristic giant halloween lunar outer space planet satellite sci-fi science fiction sepia shine space travel time travel UP cross