You'll likely catch this image a million times in your various feeds: Earth as seen by Reid Wiseman from Artemis II en-route to the Moon.
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You'll likely catch this image a million times in your various feeds: Earth as seen by Reid Wiseman from Artemis II en-route to the Moon.
My first thought? That's *really* noisy 🧐
But then I realised – it's the *nightside* of Earth, illuminated by the almost full Moon, not the Sun
The bright limb at lower-right is where the dayside starts, & the fact that you can see aurorae, airglow, & cities in Europe, Africa, & S & N America also gives the game away.
Cool.
Is that Venus in the lower right?
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Is that Venus in the lower right?
@Nina_cried Good question – it could be. I've just sent the image to Astrometry.net to see if it can identify the star field. Might need to crop it though, given that big planet thing in the middle.
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You'll likely catch this image a million times in your various feeds: Earth as seen by Reid Wiseman from Artemis II en-route to the Moon.
My first thought? That's *really* noisy 🧐
But then I realised – it's the *nightside* of Earth, illuminated by the almost full Moon, not the Sun
The bright limb at lower-right is where the dayside starts, & the fact that you can see aurorae, airglow, & cities in Europe, Africa, & S & N America also gives the game away.
Cool.
Two planets for the price of one
This screenshot from Celestia is pretty close to the orientation of the #Artemis II picture taken of Earth's nightside.
The stars in the background line up pretty well, & as @Nina_cried suspected, the bright object to the lower-left of Earth is Venus
And as the original shot suggests, the Sun is behind Earth, slightly to the lower-right of centre, hence the bright dayside limb there.
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@Nina_cried Good question – it could be. I've just sent the image to Astrometry.net to see if it can identify the star field. Might need to crop it though, given that big planet thing in the middle.
@Nina_cried You were right
Astrometry.net failed me, but I went into Celestia, set a reasonable time for when that picture might've been taken, played around with the orientation a bit, & bingo – everything lines up.
Nicely done – thanks for the suggestion.
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Two planets for the price of one
This screenshot from Celestia is pretty close to the orientation of the #Artemis II picture taken of Earth's nightside.
The stars in the background line up pretty well, & as @Nina_cried suspected, the bright object to the lower-left of Earth is Venus
And as the original shot suggests, the Sun is behind Earth, slightly to the lower-right of centre, hence the bright dayside limb there.
I tried getting Astrometry.net to solve for the starfield first, but it failed (perhaps not surprisingly given the stupid big planet in the way).
So I went into Celestia, set the time to a reasonable guess for when the Artemis picture might've been taken (I ended up at 00:30 UTC last night), played with the orientation, & bingo – everything lines up.
Not completely perfect, but good enough for government work.
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You'll likely catch this image a million times in your various feeds: Earth as seen by Reid Wiseman from Artemis II en-route to the Moon.
My first thought? That's *really* noisy 🧐
But then I realised – it's the *nightside* of Earth, illuminated by the almost full Moon, not the Sun
The bright limb at lower-right is where the dayside starts, & the fact that you can see aurorae, airglow, & cities in Europe, Africa, & S & N America also gives the game away.
Cool.
@markmccaughrean the thing that strikes me must is how thin our atmosphere is - it looks like such a fragile thing for something so important for life on earth.
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I tried getting Astrometry.net to solve for the starfield first, but it failed (perhaps not surprisingly given the stupid big planet in the way).
So I went into Celestia, set the time to a reasonable guess for when the Artemis picture might've been taken (I ended up at 00:30 UTC last night), played with the orientation, & bingo – everything lines up.
Not completely perfect, but good enough for government work.
Ha – I promise I didn't check before fiddling in Celestia, but I see that the EXIF information in the original Artemis JPG says it was taken at 00:27:39, presumably UTC.
And putting that time into Celestia, I get a sub-latitude of -2.8º, a sub-longitude of -13.9º, and a distance of ~10,000km from the surface of Earth.
Which is niche information unless you're a planetary aurora specialist like Jonathan Nichols, who asked
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@markmccaughrean the thing that strikes me must is how thin our atmosphere is - it looks like such a fragile thing for something so important for life on earth.
@ccferrie You are arguably experiencing an element of The Overview Effect
And keep in mind that the thin glow you see all around the planet is at about 80km altitude – we struggle above 5km & die above 10km.
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Two planets for the price of one
This screenshot from Celestia is pretty close to the orientation of the #Artemis II picture taken of Earth's nightside.
The stars in the background line up pretty well, & as @Nina_cried suspected, the bright object to the lower-left of Earth is Venus
And as the original shot suggests, the Sun is behind Earth, slightly to the lower-right of centre, hence the bright dayside limb there.
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@cosmos4u @Nina_cried As I said, mine was good enough for (ex-)government work
And a damn sight better than NASA's launch livestream – what a shambles, honestly
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@cosmos4u @Nina_cried As I said, mine was good enough for (ex-)government work
And a damn sight better than NASA's launch livestream – what a shambles, honestly
@markmccaughrean @Nina_cried Oh yes ... several livestreams directed by private space aficionados were way better - like catching SRB sep.
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You'll likely catch this image a million times in your various feeds: Earth as seen by Reid Wiseman from Artemis II en-route to the Moon.
My first thought? That's *really* noisy 🧐
But then I realised – it's the *nightside* of Earth, illuminated by the almost full Moon, not the Sun
The bright limb at lower-right is where the dayside starts, & the fact that you can see aurorae, airglow, & cities in Europe, Africa, & S & N America also gives the game away.
Cool.
@markmccaughrean how much of the ”noise” is satelites?
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@markmccaughrean how much of the ”noise” is satelites?
@whangdoodler None in that picture – the Sun is hidden behind Earth, so there’s nothing bright to light them. Moonlight is far too faint to lead to significant illumination. But the satellites are still there, mostly you know who’s endless cheap wifi routers
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You'll likely catch this image a million times in your various feeds: Earth as seen by Reid Wiseman from Artemis II en-route to the Moon.
My first thought? That's *really* noisy 🧐
But then I realised – it's the *nightside* of Earth, illuminated by the almost full Moon, not the Sun
The bright limb at lower-right is where the dayside starts, & the fact that you can see aurorae, airglow, & cities in Europe, Africa, & S & N America also gives the game away.
Cool.
@markmccaughrean Isn't our world beautiful?
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You'll likely catch this image a million times in your various feeds: Earth as seen by Reid Wiseman from Artemis II en-route to the Moon.
My first thought? That's *really* noisy 🧐
But then I realised – it's the *nightside* of Earth, illuminated by the almost full Moon, not the Sun
The bright limb at lower-right is where the dayside starts, & the fact that you can see aurorae, airglow, & cities in Europe, Africa, & S & N America also gives the game away.
Cool.
Ohhhhh! Something about it was bugging me, but I couldn't say what. "Dark side" was what I was missing.Thanks
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You'll likely catch this image a million times in your various feeds: Earth as seen by Reid Wiseman from Artemis II en-route to the Moon.
My first thought? That's *really* noisy 🧐
But then I realised – it's the *nightside* of Earth, illuminated by the almost full Moon, not the Sun
The bright limb at lower-right is where the dayside starts, & the fact that you can see aurorae, airglow, & cities in Europe, Africa, & S & N America also gives the game away.
Cool.
@markmccaughrean The classic big blue marble
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@markmccaughrean The classic big blue marble
@bouriquet Kind of, but different – it’s the nightside of Earth, so very faintly illuminated by the Moon only, meaning by you can see the aurorae & airglow in shot, which you’d never see on the dayside.
And the perspective is pretty tight, from only 10,000km or so above the surface, just 1.5 Earth radii. That means you see quite a bit less than a full hemisphere as you would from the Moon itself, say
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You'll likely catch this image a million times in your various feeds: Earth as seen by Reid Wiseman from Artemis II en-route to the Moon.
My first thought? That's *really* noisy 🧐
But then I realised – it's the *nightside* of Earth, illuminated by the almost full Moon, not the Sun
The bright limb at lower-right is where the dayside starts, & the fact that you can see aurorae, airglow, & cities in Europe, Africa, & S & N America also gives the game away.
Cool.
@markmccaughrean I also caught that! Cameras have gotten a HELL of a lot better.
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@markmccaughrean I also caught that! Cameras have gotten a HELL of a lot better.
@sysadmin1138 And the D5 is one of the very best cameras around if you feel the need to set the ISO to 51200
It’s famously *not* ISO invariant, & remains pretty clean up to ridiculous settings. -
You'll likely catch this image a million times in your various feeds: Earth as seen by Reid Wiseman from Artemis II en-route to the Moon.
My first thought? That's *really* noisy 🧐
But then I realised – it's the *nightside* of Earth, illuminated by the almost full Moon, not the Sun
The bright limb at lower-right is where the dayside starts, & the fact that you can see aurorae, airglow, & cities in Europe, Africa, & S & N America also gives the game away.
Cool.
There's a collection of lights off-center up & to the right. Is that a reflection?
