Starship Asterisk*

sigo diariamente las imàgenes de Apod desde sus inicios, so... :D :D

To my eye the ball should appear much smaller. It appears to span half the width of the US, isn't that more than 1400 km?

Not only have I seen it before on APOD, I copied it to my NASA photos folder and use it as a background slideshow on my desktop. It is a wonderful image! Thank you!

I voted 'No' but maybe I have seen it before and simply forgotten, given that I've been a regular APOD visitor since the late '90's.

[quote="Salt extracted?"]I wonder if the representation considers the sea's salt or is it just water? :) [/quote]
When you add salt to water, the volume actually goes down a bit. But either way, you're not going to see a visual difference in an image like this.

[color=#BF0000][size=150]I wonder if the representation considers the sea's salt or is it just water? :)
Would it be tinnier, then?[/size][/color]

It means more now that I am aware of there being so much water and ice in and beyond the Solar System. It might be feasible that, eons ago, a collision between Earth and a large "icy" body could have resulted in there being so much surface water. -- Tom Carroll/Physics/Keuka College (NY)

I have heard the statistics before, but I do not recall previously having seen this image or any other graphic depicting it visually. Cool. Having seen it, the image certainly creates a hard-to-forget imprint on the brain. imho

But it is a great image and the message should be repeated.

[quote="Rohan"]It would seem that the 700 km quoted here is in error ? - its quoted previously elsewhere as ~860 MILES.

Which is ~1385 km, incidentally.

It doesn't seem like much water, expressed like that.
But its still a big enough sphere that the ISS would be well underwater if it encountered it like that ![/quote]

They're talking about the radius. Looking at the picture, the radius of 700 km seems correct to me, as the diameter would be 1400 km, which would be the ~860 miles. I know this looks like 1400 km in diameter because I look at maps lots.

Cheers!

I remember this and also - evidently from other sources - a similar comparison of "air" volume. Like this: http://www.sciencephoto.com/media/159214/view though I do not remember the big copyright stamp on it.

I first saw it on APOD in 2012 (APOD has always been our home page) however right after (less than 3 weeks) saw it on a sight called "Earthweek" [http://www.earthweek.com/2012/ew120601/ew120601x.html]. The description captioned there was (extraordinarily) similar enough that at the time I thought "Hey, this paid entertainment company [© MMXII Earth Environment Service] has not only plagiarized APOD :shock: but is blatantly attempting to assert copyright over it" :x . Hadn't thought about that case for a while and I had to re-research the site but I see it's still there too. While I support the dissemination of information, I can't agree with that type of thievery.
PS Thanks for your awesome (and attributed) content!

Yes, but I see it only a week ago, recherging images of amount of water on Earth and other objet of Solar Sistem.
http://img.gawkerassets.com/img/17nn952lii5frjpg/original.jpg
I read only day APOD, but evidenly forget that images....

FYI: More information and a better quality image is available at
http://water.usgs.gov/edu/gallery/global-water-volume.html

I've seen this image before, and one more even most stricking, that with another ball, smaller ball, showing just drinking water (not salad). both are wonderful to comprehend why we must take care of any drop of water in the Earth.

When I try to consider the immenseness of the seas that are called shallow in the text, the pictured water droplet seems disproportional to my minds eye.

When I first saw it, I was absolutely floored! So little water compared to the size of Earth. I was in Newfoundland shortly afterward and I was looking eastward and I knew there were thousands of km between me and the UK with all that water, and, yet, there really is not all that much. My favourite image from APOD.

:?: Is the ball of water getting smaller?
how big a ball of water is drinkable?

I visit APOD every day, but I am 85 now. I voted that I had not seen this picture before, but I may have missed it during a trip to the hospital.
That happens more frequently the last several years.

Bob

If I have seen it before,I forgot it. It is worth putting up every 5 years to remind us to conserve water!

"Why are they showing this again?"... reads description, clicks link. First time on forums, hi, been loving the pictures since 2010 <3 Keep it up :D

I've seen this, or even a similar picture before, but can't remember where. Remember my surprise at the small dimensions of it.

Well, it IS "repeat Sunday".... fine with me... gives me a reminder of an interesting concept....

:---[===] *

Oops! I did not notice that one is quoted as diameter and the other is radius!

Sorry about that!

Regards,

Dave Bisset

It would seem that the 700 km quoted here is in error ? - its quoted previously elsewhere as ~860 MILES.

Which is ~1385 km, incidentally.

It doesn't seem like much water, expressed like that.
But its still a big enough sphere that the ISS would be well underwater if it encountered it like that !