APOD: Blue Marble Earth (2022 Feb 06)

Comments and questions about the APOD on the main view screen.
User avatar
APOD Robot
Otto Posterman
Posts: 4775
Joined: Fri Dec 04, 2009 3:27 am

APOD: Blue Marble Earth (2022 Feb 06)

Post by APOD Robot » Sun Feb 06, 2022 5:05 am

Image Blue Marble Earth

Explanation: Welcome to planet Earth, the third planet from a star named the Sun. The Earth is shaped like a sphere and composed mostly of rock. Over 70 percent of the Earth's surface is water. The planet has a relatively thin atmosphere composed mostly of nitrogen and oxygen. The featured picture of Earth, dubbed The Blue Marble, was taken from Apollo 17 in 1972 and features Africa and Antarctica. It is thought to be one of the most widely distributed photographs of any kind. Earth has a single large Moon that is about 1/4 of its diameter and, from the planet's surface, is seen to have almost exactly the same angular size as the Sun. With its abundance of liquid water, Earth supports a large variety of life forms, including potentially intelligent species such as dolphins and humans. Please enjoy your stay on planet Earth.

<< Previous APOD This Day in APOD Next APOD >>

User avatar
AVAO
Science Officer
Posts: 169
Joined: Tue May 28, 2019 12:24 pm
AKA: multiwavelength traveller
Location: Zurich

Re: APOD: Blue Marble Earth (2022 Feb 06)

Post by AVAO » Sun Feb 06, 2022 9:24 am

A "current" view of today's water planet can be found at
https://earth.google.com/web/@-18.81240 ... y,0h,0t,0r
The cloud picture is almost live.

A real view (Aug 7, 2017) from NASA can be found at
https://www.nasa.gov/multimedia/imagega ... _1925.html

User avatar
Astronymus
Science Officer
Posts: 138
Joined: Wed Nov 10, 2010 10:26 pm
AKA: Astro
Location: Northern Alps

Re: APOD: Blue Marble Earth (2022 Feb 06)

Post by Astronymus » Sun Feb 06, 2022 9:38 am

Pretty sure "humans" are not counted among the intelligent lifeforms.
»Only a dead Earth is a good Earth.«

DL MARTIN

Re: APOD: Blue Marble Earth (2022 Feb 06)

Post by DL MARTIN » Sun Feb 06, 2022 9:52 am

There's no free lunch.

User avatar
XgeoX
Science Officer
Posts: 209
Joined: Tue Jun 30, 2020 12:57 pm
AKA: Uncle Rico

Re: APOD: Blue Marble Earth (2022 Feb 06)

Post by XgeoX » Sun Feb 06, 2022 10:30 am

Astronymus wrote: Sun Feb 06, 2022 9:38 am Pretty sure "humans" are not counted among the intelligent lifeforms.
More scurrilous insults from dolphin posters!
I will consume you in my free dolphin tuna!

Eric
Ego vigilate
Ego audire

User avatar
XgeoX
Science Officer
Posts: 209
Joined: Tue Jun 30, 2020 12:57 pm
AKA: Uncle Rico

Re: APOD: Blue Marble Earth (2022 Feb 06)

Post by XgeoX » Sun Feb 06, 2022 10:43 am

Wow,
Just look at that gorgeous green belt of vegetaion and how Madagascar (an island only well known because of it being a province in Risk™️) is covered with it not to mention the gorgeous white water clouds.
You know I get wanting to explore Mars in person for a year or two (I would todo it!) but I don’t get wanting to finish your life out on that cold, drier than we can imagine and bereft of blue and green planet drinking and eating waste derived food. I’d rather let probes do it.
Ego vigilate
Ego audire

Roger

Re: APOD: Blue Marble Earth (2022 Feb 06)

Post by Roger » Sun Feb 06, 2022 12:02 pm

A couple of the interesting things that this image shows rather subtly are a narrrow, bright limb band at the left edge of the Earth, which is absent on the right side because the right side is a terminator, not a limb; and a specular reflection from the ocean next to Africa, displaced slightly to the left of center because of the relative positions of the Sun and the photographer. Bright limb bands are also seen (in images and also visually) with Venus and Mars. Specular reflections are detected from the lakes of Titan at wavelengths longer than we can see (long enough to penetrate Titan's atmosphere).

User avatar
orin stepanek
Plutopian
Posts: 7718
Joined: Wed Jul 27, 2005 3:41 pm
Location: Nebraska

Re: APOD: Blue Marble Earth (2022 Feb 06)

Post by orin stepanek » Sun Feb 06, 2022 1:07 pm

bluemarble_apollo17_3000.jpg
happy-kitten-kittens-5890512-1600-12001-1024x768.jpg
Beautiful marble Earth; Best place in the Solar System: Glad I live
here! Kitty think so too! :lol2:
You do not have the required permissions to view the files attached to this post.
Orin

Smile today; tomorrow's another day!

User avatar
Fred the Cat
Theoretic Apothekitty
Posts: 856
Joined: Mon Feb 22, 2016 4:09 pm
AKA: Ron
Location: Eagle, Idaho

Re: APOD: Blue Marble Earth (2022 Feb 06)

Post by Fred the Cat » Sun Feb 06, 2022 5:13 pm

Perhaps Webb will provide evidence about how common water is in other solar systems. :?:
Freddy's Felicity "Only ascertain as a cat box survivor"

User avatar
JohnD
Tea Time, Guv! Cheerio!
Posts: 1513
Joined: Wed Feb 16, 2005 2:11 pm
Location: Lancaster, England

Re: APOD: Blue Marble Earth (2022 Feb 06)

Post by JohnD » Sun Feb 06, 2022 6:19 pm

" potentially intelligent species such as dolphins and humans", who are mostly harmless.

User avatar
johnnydeep
Captain
Posts: 1482
Joined: Sun Feb 20, 2011 8:57 pm

Re: APOD: Blue Marble Earth (2022 Feb 06)

Post by johnnydeep » Sun Feb 06, 2022 7:15 pm

Astronymus wrote: Sun Feb 06, 2022 9:38 am Pretty sure "humans" are not counted among the intelligent lifeforms.
Which is why there's no comma after 'dolphins'!
...including potentially intelligent species such as dolphins and humans.
That is, both humans and dolphins are counted as among the merely potentially intelligent.
--
"To B̬̻̋̚o̞̮̚̚l̘̲̀᷾d̫͓᷅ͩḷ̯᷁ͮȳ͙᷊͠ Go......Beyond The F͇̤i̙̖e̤̟l̡͓d͈̹s̙͚ We Know."

User avatar
XgeoX
Science Officer
Posts: 209
Joined: Tue Jun 30, 2020 12:57 pm
AKA: Uncle Rico

Re: APOD: Blue Marble Earth (2022 Feb 06)

Post by XgeoX » Mon Feb 07, 2022 11:14 am

orin stepanek wrote: Sun Feb 06, 2022 1:07 pm happy-kitten-kittens-5890512-1600-12001-1024x768.jpg
Beautiful marble Earth; Best place in the Solar System: Glad I live
here! Kitty think so too! :lol2:
Another reason to hang out on Earth until of course the dawn of star kitty…


Image


Eric
Ego vigilate
Ego audire