4 ms·
Yep, that little dot in the sea of infinity is our little blue marble. No one have ever been more than a pixel (EDIT: a couple hundred pixels) distant from it,
by Artlav 9y ago
Yep, that little dot in the sea of infinity is our little blue marble. No one have ever been more than a pixel (EDIT: a couple hundred pixels) distant from it, and soon even that achievement would fade from living memory.
- Sharlin 9y agoWell, we've been a bit farther away than a single pixel :) The moon is also visible in the photo (and appears to be closer to Earth than it actually is because the Moon-Earth-Saturn angle was not 90 degrees when Cassini took this picture).
- Artlav 9y agoAh, i see. I thought the Moon was unresolved within the dot, not the faint dot to the left. :(
- Sharlin 9y agoTo be fair, the Earth-Moon separation as seen from Saturn is about one arcminute, just at the limit of the angular resolution of human eye. To a human they wouldn't be discernible as separate objects. Cassini's camera has a much narrower field of view.
- rgun 9y agoEarth in this image has a diameter of around 5 pixels. So each pixel here is around 2500 km (as diameter of earth is around 12700 km [1]) Farthest human has been is 400,000 km [2]. So the farthest we have ever been is around 160 pixels. [1] https://www.google.co.in/search?q=diameter+of+earth&oq=diameter+of+earth&aqs=chrome..69i57j6j0l4.3154j0j7&sourceid=chrome&ie=UTF-8 https://www.google.co.in/search?q=diameter+of+earth&oq=diame... [2] https://en.wikipedia.org/wiki/List_of_spaceflight_records#Farthest_humans_from_Earth https://en.wikipedia.org/wiki/List_of_spaceflight_records#Fa...
- muench 9y agoThe distance from earth to the moon is 384,400 km, and in the smaller detail picture that earth to moon distance is about 23 pixels. Or about 16,700 km per pixel. And note they describe that small picture as "zoomed in", So I figure 400km is about 23 or maybe 24 pixels at most =D (or a diameter of less than 50 pixels). Waiting for someone to find an even better estimation!
- nomercy400 9y agoYou are overlooking one major thing: From the perspective of the camera, the position of the moon relative to the earth matters for the number of pixels. For example, if the moon was directly between the earth and the camera, the earth-to-moon distance in pixels would be 0, but the real distance would still be ~384.400km. You cannot use the earth-to-moon distance, unless you also know the exact position of the camera, earth and moon in the 3D plane.
- deleted 9y ago[deleted]
- pc86 9y agoDoes this pedantry really change the meaning of Artlav's statement?
- jbg_ 9y agoPlease don't put down accuracy.