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APOD: Mercury and the Da Vinci Glow (2021 Jul 10)
Posted: Sat Jul 10, 2021 4:05 am
by APOD Robot
Mercury and the Da Vinci Glow
Explanation: On July 8th early morning risers saw Mercury near an old Moon low on the eastern horizon.
On that date bright planet, faint glow of lunar night side, and sunlit crescent were captured in this predawn skyscape from Tenerife's Teide National Park in the Canary Islands. Never far from the Sun in planet Earth's sky, the
fleeting inner planet shines near its brightest in the morning twilight scene. Mercury lies just below the zeta star of the constellation Taurus,
Zeta Tauri, near the
tip of the celestial bull's horn. Of course the Moon's ashen glow is
earthshine, earthlight reflected from the Moon's night side. A description of earthshine, in terms of sunlight reflected by Earth's oceans illuminating the Moon's dark surface, was written over 500 years ago by
Leonardo da Vinci. Waiting for the coming dawn in the foreground are the
Teide Observatory's sentinels of the Sun, also known as (large domes left to right) the
THEMIS,
VTT, and GREGOR solar telescopes.
Re: APOD: Mercury and the Da Vinci Glow (2021 Jul 10)
Posted: Sat Jul 10, 2021 11:49 am
by XgeoX
This picture has a wonderful
Parrish Blue in it…
“Maxfield Parrish's art is characterized by vibrant colors; the color Parrish blue was named after him. He achieved such luminous color through glazing. This process involves applying alternating bright layers of translucent glaze separated by varnish over a base rendering. Parrish usually used a blue and white monochromatic underpainting.”
Eric
Re: APOD: Mercury and the Da Vinci Glow (2021 Jul 10)
Posted: Sat Jul 10, 2021 12:05 pm
by orin stepanek
That has to be the brightest i ever seen on a photo of Mercury taken
from Earth! Nicely done!
Re: APOD: Mercury and the Da Vinci Glow (2021 Jul 10)
Posted: Sun Jul 11, 2021 3:48 am
by Sa Ji Tario
I once read that with the light of the Earth you could read the newspaper on the Moon
Re: APOD: Mercury and the Da Vinci Glow (2021 Jul 10)
Posted: Sun Jul 11, 2021 5:10 am
by alter-ego
Sa Ji Tario wrote: ↑Sun Jul 11, 2021 3:48 am
I once read that with the light of the Earth you could read the newspaper on the Moon
The "full" Earth can be ~15x brighter than a full moon. People have claimed to read as small as ~ 12 pts font size during full moon. Assuming a 10pt font size for newspapers, I think what you read is plausible, especially with reading glasses
Re: APOD: Mercury and the Da Vinci Glow (2021 Jul 10)
Posted: Sun Jul 11, 2021 8:29 am
by Ann
XgeoX wrote: ↑Sat Jul 10, 2021 11:49 am
This picture has a wonderful
Parrish Blue in it…
“Maxfield Parrish's art is characterized by vibrant colors; the color Parrish blue was named after him. He achieved such luminous color through glazing. This process involves applying alternating bright layers of translucent glaze separated by varnish over a base rendering. Parrish usually used a blue and white monochromatic underpainting.”
Eric
Wow, that's an absolutely amazing image! The water seems to glow from smoldering blue embers from within!
Ann
Re: APOD: Mercury and the Da Vinci Glow (2021 Jul 10)
Posted: Mon Jul 12, 2021 11:55 am
by XgeoX
Ann wrote: ↑Sun Jul 11, 2021 8:29 am
XgeoX wrote: ↑Sat Jul 10, 2021 11:49 am
This picture has a wonderful
Parrish Blue in it…
“Maxfield Parrish's art is characterized by vibrant colors; the color Parrish blue was named after him. He achieved such luminous color through glazing. This process involves applying alternating bright layers of translucent glaze separated by varnish over a base rendering. Parrish usually used a blue and white monochromatic underpainting.”
Eric
Wow, that's an absolutely amazing image! The water seems to glow from smoldering blue embers from within!
Ann
Maxfield Parrish was a genius and my all time favorite artist! Please check out his work it is unbelievable!
Eric
Re: APOD: Mercury and the Da Vinci Glow (2021 Jul 10)
Posted: Mon Jul 12, 2021 11:57 am
by XgeoX
alter-ego wrote: ↑Sun Jul 11, 2021 5:10 am
Sa Ji Tario wrote: ↑Sun Jul 11, 2021 3:48 am
I once read that with the light of the Earth you could read the newspaper on the Moon
The "full" Earth can be ~15x brighter than a full moon. People have claimed to read as small as ~ 12 pts font size during full moon. Assuming a 10pt font size for newspapers, I think what you read is plausible, especially with reading glasses
Given that a full moon is 400,000 times fainter than the sun the 15x brighter than the full moon isn’t that great. I really doubt it could be read…
One way to settle it, let’s go and see for ourselves!
Eric
Re: APOD: Mercury and the Da Vinci Glow (2021 Jul 10)
Posted: Mon Jul 12, 2021 2:13 pm
by neufer
XgeoX wrote: ↑Mon Jul 12, 2021 11:57 am
alter-ego wrote: ↑Sun Jul 11, 2021 5:10 am
Sa Ji Tario wrote: ↑Sun Jul 11, 2021 3:48 am
I once read that with the light of the Earth you could read the newspaper on the Moon
The "full" Earth can be ~15x brighter than a full moon. People have claimed to read as small as ~ 12 pts font size during full moon. Assuming a 10pt font size for newspapers, I think what you read is plausible, especially with reading glasses
Given that a full moon is 400,000 times fainter than the sun the 15x brighter than the full moon isn’t that great. I really doubt it could be read…
The Earth would appear 13.4 times ( ~ 15 x) larger than the Moon (area wise);
however, it has an albedo 2.7 times greater: making it
36 times brighter.
https://en.wikipedia.org/wiki/Lux wrote:
Code: Select all
Illuminance (lux) Surfaces illuminated by
-------------------------------------------------
0.002 Moonless clear night sky with airglow
0.25 Full moon on a clear night
9.0 Full Earth on the Moon
50 Family living room lights
80 Office building hallway/toilet lighting
400 Office lighting
400 Sunrise or sunset on a clear day.
1000 Overcast day; typical TV studio lighting
10,000–25,000 Full daylight (not direct sun)
32,000–100,000 Direct sunlight
(However, hardly anyone reads newspapers any more.)
Re: APOD: Mercury and the Da Vinci Glow (2021 Jul 10)
Posted: Tue Jul 13, 2021 3:32 am
by alter-ego
neufer wrote: ↑Mon Jul 12, 2021 2:13 pm
XgeoX wrote: ↑Mon Jul 12, 2021 11:57 am
alter-ego wrote: ↑Sun Jul 11, 2021 5:10 am
The "full" Earth can be ~15x brighter than a full moon. People have claimed to read as small as ~ 12 pts font size during full moon. Assuming a 10pt font size for newspapers, I think what you read is plausible, especially with reading glasses
Given that a full moon is 400,000 times fainter than the sun the 15x brighter than the full moon isn’t that great. I really doubt it could be read…
The Earth would appear 13.4 times ( ~ 15 x) larger than the Moon (area wise);
however, it has an albedo 2.7 times greater: making it
36 times brighter.
https://en.wikipedia.org/wiki/Lux wrote:
Code: Select all
Illuminance (lux) Surfaces illuminated by
-------------------------------------------------
0.002 Moonless clear night sky with airglow
0.25 Full moon on a clear night
9.0 Full Earth on the Moon
50 Family living room lights
80 Office building hallway/toilet lighting
400 Office lighting
400 Sunrise or sunset on a clear day.
1000 Overcast day; typical TV studio lighting
10,000–25,000 Full daylight (not direct sun)
32,000–100,000 Direct sunlight
(However, hardly anyone reads newspapers any more.)
Well, too lazy to do the calc, and mistakenly landed on the wrong link. The detail makes reading easier, though. BTW, I'm one who still likes newspapers.
Re: APOD: Mercury and the Da Vinci Glow (2021 Jul 10)
Posted: Tue Jul 13, 2021 3:35 pm
by neufer
alter-ego wrote: ↑Tue Jul 13, 2021 3:32 am
BTW, I'm one who still likes newspapers.
- The Seattle Times