MAX ALEXANDER / SCIENCE PHOTO LIBRARY MAX ALEXANDER / SCIENCE PHOTO LIBRARY
Telescopes at dusk, La Palma, Canary Islands. Silhouettes of the William Herschel Telescope (WHT, lower left) and the Liverpool Telescope (LT, lower right) at dusk. The moon and above it, the planet Venus can be seen in the night sky. The WHT is a 4.2 metres optical telescope, the LT is a 2 metre fully robotic telescope.
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