AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |
Back to Blog
Reflector on moon1/11/2024 ![]() Archived from the original on 3 September 2019. ^ Nemiroff, Robert Bonnell, Jerry (24 March 2012).Archived from the original on 17 June 2019. ^ Nemiroff, Robert Bonnell, Jerry (20 January 2018).58), in the phrase "‘A saw the new muin late yestreen/ Wi the auld muin in her airm." See also It is referenced in " The Ballad of Sir Patrick Spens" ( Child Ballad No. The phenomenon was sketched and remarked upon in the 16th century by Leonardo da Vinci, who thought that the illumination came from reflections from the Earth's oceans (we now know that clouds account for much more reflected intensity than the oceans). Radio frequency transmissions are also reflected by the moon for example, see Earth–Moon–Earth communication. High contrast photography is also able to reveal the night side of the moon illuminated by Earthlight during a solar eclipse. Clarke uses it in this sense in his 1955 novel Earthlight. The term earthlight would also be suitable for an observer on the Moon seeing Earth during the lunar night, or for an astronaut inside a spacecraft looking out the window. Earthshine is most clearly seen after dusk during the waxing crescent (in the western sky) and before dawn during the waning crescent (in the eastern sky). On these nights, the entire lunar disk is both directly and indirectly sunlit, and is thus unevenly bright enough to see. This phenomenon is most visible from Earth at night (or astronomical twilight) a few days before or after the day of new moon, when the lunar phase is a thin crescent. Earthshine has a calculated maximum apparent magnitude of −3.69 as viewed from Earth. This is only 0.01% of the radiance from direct Sunlight. When the Earth is at maximum phase, the total radiance at the lunar surface is approximately 0.15 W m −2 from Earthlight. Visibility Įarthlight has a calculated maximum apparent magnitude of −17.7 as viewed from the Moon. Earthlight on the Moon during the waxing crescent is called "the old Moon in the new Moon's arms", while that during the waning crescent is called "the new Moon in the old Moon's arms". ![]() Earthshine (an example of planetshine), also known as the Moon's ashen glow, is the dim illumination of the otherwise unilluminated portion of the Moon by this indirect sunlight. The green ghost image was caused by a UV filter on the lens.Įarthlight is the diffuse reflection of sunlight reflected from Earth's surface and clouds. An 80 mm shot of a crescent Moon with a 10-second exposure, revealing earthshine. During the crescent phase, the darker side of the Moon reflects indirect sunlight, reflected from Earth, while the other side reflects direct sunlight. On the left, the star Omicron Arietis (37 Ari, 6,2 m) in the constellation Aries. Image taken 20° over the western evening sky shortly after the equinox in spring with a particularly steep ecliptic as seen from Berlin. Light reflected from the Earth The night side of the moon, illuminated by earthshine, becomes visible next to the narrow crescent (11 percent, age of the moon = 3.3 days) with ash-grey moonlight.
0 Comments
Read More
Leave a Reply. |