by APOD Robot » Mon Oct 18, 2021 4:06 am
Earthshine Moon over Sicily
Explanation: Why can we see the entire face of this Moon? When the
Moon is in a crescent phase, only part of it appears directly illuminated by the
Sun. The answer is
earthshine, also known as
earthlight and the
da Vinci glow. The reason is that the rest of the
Earth-facing Moon is slightly illuminated by sunlight first reflected from the Earth. Since the Earth appears near full phase from the
Moon -- when the
Moon appears as a slight crescent from the Earth --
earthshine is then near its brightest. Featured here in combined, consecutively-taken,
HDR images taken earlier this month, a
rising earthshine Moon was captured passing slowly near the
planet Venus, the brightest spot near the image center. Just above Venus is the star
Dschubba (catalogued as
Delta Scorpii), while the red star on the far left is
Antares. The
celestial show is visible through scenic cloud decks. In the foreground are the lights from
Palazzolo Acreide, a
city with ancient
historical roots in
Sicily,
Italy.
[url=https://apod.nasa.gov/apod/ap211018.html] [img]https://apod.nasa.gov/apod/calendar/S_211018.jpg[/img] [size=150]Earthshine Moon over Sicily[/size][/url]
[b] Explanation: [/b] Why can we see the entire face of this Moon? When the [url=https://moon.nasa.gov/]Moon[/url] is in a crescent phase, only part of it appears directly illuminated by the [url=https://solarsystem.nasa.gov/solar-system/sun/in-depth/]Sun[/url]. The answer is [url=https://earthobservatory.nasa.gov/images/83782/earthshine]earthshine[/url], also known as [url=https://en.wikipedia.org/wiki/Earthlight_(astronomy)]earthlight[/url] and the [url=https://apod.nasa.gov/apod/ap190504.html]da Vinci glow[/url]. The reason is that the rest of the [url=https://apod.nasa.gov/apod/ap210111.html]Earth-facing Moon[/url] is slightly illuminated by sunlight first reflected from the Earth. Since the Earth appears near full phase from the [url=https://solarsystem.nasa.gov/moons/earths-moon/overview/]Moon[/url] -- when the [url=https://apod.nasa.gov/apod/ap200316.html]Moon appears as a slight crescent[/url] from the Earth -- [url=https://www.timeanddate.com/astronomy/earthshine.html]earthshine[/url] is then near its brightest. Featured here in combined, consecutively-taken, [url=https://en.wikipedia.org/wiki/High_dynamic_range]HDR[/url] images taken earlier this month, a [url=https://apod.nasa.gov/apod/ap211010.html]rising[/url] earthshine Moon was captured passing slowly near the [url=https://www.nasa.gov/venus]planet Venus[/url], the brightest spot near the image center. Just above Venus is the star [url=http://stars.astro.illinois.edu/sow/dschubba.html]Dschubba[/url] (catalogued as [url=https://en.wikipedia.org/wiki/Delta_Scorpii]Delta Scorpii[/url]), while the red star on the far left is [url=https://youtu.be/cw_IKaBokm0]Antares[/url]. The [url=https://images.unsplash.com/photo-1520168133788-3c084821ec1f]celestial show[/url] is visible through scenic cloud decks. In the foreground are the lights from [url=https://youtu.be/Z9qOUcRYdqo]Palazzolo Acreide[/url], a [url=https://en.wikipedia.org/wiki/Palazzolo_Acreide#History]city[/url] with ancient [url=https://whc.unesco.org/en/list/1024/]historical roots[/url] in [url=https://en.wikipedia.org/wiki/Sicily]Sicily[/url], [url=https://en.wikipedia.org/wiki/Italy]Italy[/url].
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