martin frewer

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Volcano Erupts in Chile: Pictures

San Francisco Bay Area


Old Boat

APOD: The Milky Way Over the Arizona Toadstools (2015 Feb 23) Image Credit & Copyright: David Lane & R. Gendler (3 insets) Explanation: Which is older -- the rocks you see on the ground or the light you see from the sky? Usually it's the rocks that are older, with their origin sentiments deposited well before light left any of the stars or nebulas you see in the sky. However, if you can see, through a telescope, a distant galaxy far across the universe -- further than Andromeda or spiral galaxy NGC 7331 (inset) -- then you are seeing light even more ancient. Featured here, the central disk of our Milky Way Galaxy arches over Toadstool hoodoos rock formations in northern Arizona, USA. The unusual Toadstool rock caps are relatively hard sandstone that wind has eroded more slowly than the softer sandstone underneath. The green bands are airglow, light emitted by the stimulated air in Earth's atmosphere. On the lower right is a time-lapse camera set up to capture the sky rotating behind the picturesque foreground scene. Annotated: Starship Asterisk* • APOD Discussion Page #APOD

Bitter cold

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Towards the Light

Bridge to the Universe

Winter Milky Way

Slow Exposure Glow Sticks in Waterfall


Comet Kicks up Dust in Helix Nebula

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