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On the left, the star Omicron Arietis (37 Ari, 6,2 m) in the constellation Aries. During the crescent phase, the darker side of the Moon reflects indirect sunlight, reflected from Earth, while the other side reflects direct sunlight. An 80 mm shot of a crescent Moon with a 10-second exposure, revealing earthshine.
The Star on the Mountain is a man-made star-shaped landmark on the Franklin Mountains in El Paso, Texas, that is illuminated nightly by the El Paso Chamber.It was first lit as a Christmas decoration in 1940 and was meant as a reminder to people on both sides of the nearby Mexico–United States border that America was at peace during the holiday season.
Exoplanets have been discovered using several different methods for collecting or combining direct images to isolate planets from the background light of their star. Non-Redundant Aperture Masking Interferometry is a method of combining the views of multiple telescopes into a single image, while the other methods are algorithms for combining ...
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This is a list of sources of light, the visible part of the electromagnetic spectrum.Light sources produce photons from another energy source, such as heat, chemical reactions, or conversion of mass or a different frequency of electromagnetic energy, and include light bulbs and stars like the Sun. Reflectors (such as the moon, cat's eyes, and mirrors) do not actually produce the light that ...
A star trail is a type of photograph that uses long exposure times to capture diurnal circles, the apparent motion of stars in the night sky due to Earth's rotation. A star-trail photograph shows individual stars as streaks across the image, with longer exposures yielding longer arcs .
Umbra, penumbra and antumbra of Earth and images that could be seen at some points in these areas (Note: the relative size and distance of the bodies shown are not to scale.)“… The Earth’s shadow has two distinct parts,… the UMBRA is the part of the shadow where all direct sunlight is blocked by the Earth; the PENUMBRA of the shadow is ...
Urban areas produce light pollution so equipment and observatories doing astronomical imaging are often located in remote locations to allow long exposures without the film or detectors being swamped with stray light. Since the Earth is constantly rotating, telescopes and equipment are rotated in the opposite direction to follow the apparent ...