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NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...

 
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
 Quoting: Anonymous Coward 80630295


Dumbfuck shill retard from Britain masquerading as a stupid hick to make Americans look fucking stupid is promoting false propaganda.
[link to epic.gsfc.nasa.gov (secure)]
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
 Quoting: Anonymous Coward 80630295


Dumbfuck shill retard from Britain masquerading as a stupid hick to make Americans look fucking stupid is promoting false propaganda.
[link to epic.gsfc.nasa.gov (secure)]
 Quoting: Astromut


Got a photo of earth?
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
 Quoting: Anonymous Coward 80630295


Dumbfuck shill retard from Britain masquerading as a stupid hick to make Americans look fucking stupid is promoting false propaganda.
[link to epic.gsfc.nasa.gov (secure)]
 Quoting: Astromut


If you think that is a photo, I've got a bridge to sell you.
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
Perfectly spherical... not an oblate spheroid?
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
And what if they fail and divert it to the earth
 Quoting: Anonymous Coward 41173011


Or what if they succeed and demonstrate that asteroids can be redirected either away from Earth or towards Earth.

It's basically like inventing a new type of nuclear weapon. The technology to make some asteroids miss the earth is the same as the technology to make some asteroids hit the earth.

As nuclear weapons aren't cheap, and these missions are automated, it could even be cost effective compared to building missiles, and especially cost effective compared to doing an entire nuclear program from the ground up.
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
...


You just can't give it up can you Rube? You may fool others, but you don't fool me. You would only need to "poll" who agrees with your nonsense and who sees you for the truth if you are a shill for the ABC boys. I see you.
 Quoting: Anonymous Coward 79229737


I don't need to fool you, you're already a fool. I've polled GLP, about a third are unwilling to even watch my videos presenting the truth, same proportion of users who leave me red. It's held steady at about that percentage for years.
Thread: Should I live stream ISS?
 Quoting: Astromut


He's tossed down the gauntlet Astro
 Quoting: Anonymous Coward 78062180

What gauntlet? It's up to him to support his argument that it could redirect the moon to earth. So far he presented nothing. That which can be asserted without evidence can be dismissed without evidence. You are dismissed.
 Quoting: Astromut


Since some of you won't shut up about this, let's do the math. Then you both owe me an apology. We know the size of Didymos is 780 meters in diameter. Using the formula for the volume of a sphere we can approximate its volume as about 248,474,846 m^3. We can calculate its mass using the orbit of its moon, Dimorphos. For a given orbital period and distance, m = ((2*pi)^2 * distance^3)/(period^2*G). With period = 42837 seconds and distance = 1,180 m we get a mass of about 5.29632*10^11 kg. That means an overall density of about 2,132 kg/m^3 which is pretty typical for an asteroid. The moon is much smaller, only about 170 +/- 30 meters based on radar observations, so let's take the lower value of 140 m to be generous to the claim that DART can move this thing out of Didymos orbit and towards earth. Using our previously established density of about 2132 kg/m^3 we find a mass of Dimorphos of about 3.06 * 10^9 kilograms which is a little less than the official value because we've assumed the minimum size. We know the DART impactor will be 500 kg and traveling at about 6.6 km/s, so we can be very generous and assume an entirely elastic collision with no dissipation where the impactor transfers its entire kinetic energy into the moon as kinetic energy (which won't happen, but again we're trying to see the MAXIMUM change in velocity this impactor could impart). We can use the formula for an elastic collision and find out how much the moon will change in velocity from its initial velocity.

(500kg*6600m/s)/3.06316175 * 10^9 kilograms = 0.001 m/s

That's a tenth of a cm/s. That's barely anything at all. This is why they're doing this to a moon of a larger asteroid; the velocity of its orbit around its parent is small, so even a small change will be detectable. But how fast is it orbiting? Well for an average distance of about 1.18 km in a nearly circular orbit we get an orbital circumference of about 3.7 km and at an orbital period of 42,837 seconds, we find an orbital velocity of about 0.086 m/s. So a change of 0.001 m/s would be a change of about 1% to its orbital velocity around its parent asteroid. Is that even enough to escape from Didymos if applied in the right way to accelerate the moon? Well, do the math. Escape velocity = sqrt((2*G*M)/r). M is the mass of Didymos (5.29632*10^11 kg), r is the radius of Dimorphos' orbit (1.18 km) so plugging that in along with the gravitational constant gives an escape velocity of about 0.2448 m/s. 0.001 + 0.086 = 0.0861 which is way, way less than 0.2448 m/s. So no, even assuming the most generous things about the size and mass of the moon, even assuming a perfectly elastic collision with no losses to heat which brings the impactor to a dead stop and transfers all the kinetic energy to the moon, it still would not be nearly enough to push the moon out of Didymos orbit, let alone to earth.

Last Edited by Astromut on 07/26/2021 02:25 PM
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Sungaze_At_Dawn

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07/26/2021 02:23 PM

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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
So they want to take a near earth but non threat and try sending to earth? Because that's how I read this.
 Quoting: Sungaze_At_Dawn


No.
 Quoting: Astromut


I don't trust them at all. They're genocidal murdering demons beyond. So again I do not trust them at all.
The Devil tries to convince everyone he doesn't exist.
The state tries to convince everyone they cannot resist.
Do not go quietly into the good night. Rage Rage against the dying light!
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
 Quoting: Anonymous Coward 80630295


Dumbfuck shill retard from Britain masquerading as a stupid hick to make Americans look fucking stupid is promoting false propaganda.
[link to epic.gsfc.nasa.gov (secure)]
 Quoting: Astromut


If you think that is a photo, I've got a bridge to sell you.
 Quoting: Anonymous Coward 80630295


It's a photo. Deal with it.
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
 Quoting: Anonymous Coward 80630295


Dumbfuck shill retard from Britain masquerading as a stupid hick to make Americans look fucking stupid is promoting false propaganda.
[link to epic.gsfc.nasa.gov (secure)]
 Quoting: Astromut


Got a photo of earth?
 Quoting: Anonymous Coward 80630295


You're blind.
[link to epic.gsfc.nasa.gov (secure)]
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
So they want to take a near earth but non threat and try sending to earth? Because that's how I read this.
 Quoting: Sungaze_At_Dawn


No.
 Quoting: Astromut


I don't trust them at all. They're genocidal murdering demons beyond. So again I do not trust them at all.
 Quoting: Sungaze_At_Dawn


You don't have to. Do the math yourself.
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
How are they handling the radiation of the Van Allen Belt? According to NASA, that's something they're still working on before they can send a ship to Mars.

Apparently, they lost the plans for whatever they used during Apollo.
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
That's cool as shit, no time to try it like the present!

:pop:
 Quoting: BFD


How much time do i have? I've got no faith that these clowns are gonna succeed.

uhoh
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
How are they handling the radiation of the Van Allen Belt? According to NASA, that's something they're still working on before they can send a ship to Mars.

Apparently, they lost the plans for whatever they used during Apollo.
 Quoting: Helo


Here is a plot of how much radiation the astronauts would be expected to receive given Apollo 11's trajectory to the moon, one way. Apollo had an areal density equivalent to about 7~8 g/cm^2:
[link to drive.google.com (secure)]
Less than 1 rad each way, it's harmless, the trapped proton dose from the Van Allen belts is less than a tenth of a rad (so even with the Q factor discussed below, less than a rem of VAB radiation).

By way of comparison, here is the dose you would receive in an Apollo capsule flying the same trajectory as Orion EFT-1's final orbit (though with a slightly higher perigee, SPENVIS won't let you calculate trajectories that go through the atmosphere):
[link to drive.google.com (secure)]
Here's a map of the orbit:
[link to drive.google.com (secure)]
Nearly 10 rads, with the dose almost entirely made up of radiation trapped in the belt. The Q factor on that could be as high as 10 ( [link to www.nrc.gov (secure)] ), so you could be looking at about 100 rem equivalent dose. At that dose with an acute exposure, you're looking at chromosome damage, reduction in white blood cell count, and the onset of radiation sickness within a few hours.

Trajectory matters. Apollo's trajectory was not hazardous to the crew.
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
How are they handling the radiation of the Van Allen Belt? According to NASA, that's something they're still working on before they can send a ship to Mars.

Apparently, they lost the plans for whatever they used during Apollo.
 Quoting: Helo


Here is a plot of how much radiation the astronauts would be expected to receive given Apollo 11's trajectory to the moon, one way. Apollo had an areal density equivalent to about 7~8 g/cm^2:
[link to drive.google.com (secure)]
Less than 1 rad each way, it's harmless, the trapped proton dose from the Van Allen belts is less than a tenth of a rad (so even with the Q factor discussed below, less than a rem of VAB radiation).

By way of comparison, here is the dose you would receive in an Apollo capsule flying the same trajectory as Orion EFT-1's final orbit (though with a slightly higher perigee, SPENVIS won't let you calculate trajectories that go through the atmosphere):
[link to drive.google.com (secure)]
Here's a map of the orbit:
[link to drive.google.com (secure)]
Nearly 10 rads, with the dose almost entirely made up of radiation trapped in the belt. The Q factor on that could be as high as 10 ( [link to www.nrc.gov (secure)] ), so you could be looking at about 100 rem equivalent dose. At that dose with an acute exposure, you're looking at chromosome damage, reduction in white blood cell count, and the onset of radiation sickness within a few hours.

Trajectory matters. Apollo's trajectory was not hazardous to the crew.
 Quoting: Astromut


The Van Allen Belt is a giant Cyclotron.
It makes CERN look like a play ground merry-go-round.

.
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07/26/2021 03:01 PM

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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
How are they handling the radiation of the Van Allen Belt? According to NASA, that's something they're still working on before they can send a ship to Mars.

Apparently, they lost the plans for whatever they used during Apollo.
 Quoting: Helo


Here is a plot of how much radiation the astronauts would be expected to receive given Apollo 11's trajectory to the moon, one way. Apollo had an areal density equivalent to about 7~8 g/cm^2:
[link to drive.google.com (secure)]
Less than 1 rad each way, it's harmless, the trapped proton dose from the Van Allen belts is less than a tenth of a rad (so even with the Q factor discussed below, less than a rem of VAB radiation).

By way of comparison, here is the dose you would receive in an Apollo capsule flying the same trajectory as Orion EFT-1's final orbit (though with a slightly higher perigee, SPENVIS won't let you calculate trajectories that go through the atmosphere):
[link to drive.google.com (secure)]
Here's a map of the orbit:
[link to drive.google.com (secure)]
Nearly 10 rads, with the dose almost entirely made up of radiation trapped in the belt. The Q factor on that could be as high as 10 ( [link to www.nrc.gov (secure)] ), so you could be looking at about 100 rem equivalent dose. At that dose with an acute exposure, you're looking at chromosome damage, reduction in white blood cell count, and the onset of radiation sickness within a few hours.

Trajectory matters. Apollo's trajectory was not hazardous to the crew.
 Quoting: Astromut


The Van Allen Belt is a giant Cyclotron.
It makes CERN look like a play ground merry-go-round.

.
 Quoting: Anonymous Coward 76294842

You are speaking in generalities, I am speaking with real world specifics. Here is a plot of how much radiation the astronauts would be expected to receive given Apollo 11's trajectory to the moon, one way. Apollo had an areal density equivalent to about 7~8 g/cm^2:
[link to drive.google.com (secure)]
Less than 1 rad each way, it's harmless, the trapped proton dose from the Van Allen belts is less than a tenth of a rad (so even with the Q factor discussed below, less than a rem of VAB radiation).

By way of comparison, here is the dose you would receive in an Apollo capsule flying the same trajectory as Orion EFT-1's final orbit (though with a slightly higher perigee, SPENVIS won't let you calculate trajectories that go through the atmosphere):
[link to drive.google.com (secure)]
Here's a map of the orbit:
[link to drive.google.com (secure)]
Nearly 10 rads, with the dose almost entirely made up of radiation trapped in the belt. The Q factor on that could be as high as 10 ( [link to www.nrc.gov (secure)] ), so you could be looking at about 100 rem equivalent dose. At that dose with an acute exposure, you're looking at chromosome damage, reduction in white blood cell count, and the onset of radiation sickness within a few hours.

Trajectory matters. Apollo's trajectory was not hazardous to the crew.
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07/26/2021 03:19 PM
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
The Double Asteroid Redirection Test (DART) mission is directed by NASA to the Johns Hopkins Applied Physics Laboratory (APL) with support from several NASA centers: the Jet Propulsion Laboratory (JPL), Goddard Space Flight Center (GSFC), Johnson Space Center (JSC), Glenn Research Center (GRC), and Langley Research Center (LaRC).

DART is a planetary defense-driven test of technologies for preventing an impact of Earth by a hazardous asteroid. DART will be the first demonstration of the kinetic impactor technique to change the motion of an asteroid in space. The DART mission is in Phase C, led by APL and managed under NASA’s Solar System Exploration Program at Marshall Space Flight Center for NASA’s Planetary Defense Coordination Office and the Science Mission Directorate’s Planetary Science Division at NASA Headquarters in Washington, DC.

The binary near-Earth asteroid (65803) Didymos is the target for the DART demonstration. While the Didymos primary body is approximately 780 meters across, its secondary body (or “moonlet”) is about 160-meters in size, which is more typical of the size of asteroids that could pose the most likely significant threat to Earth. The Didymos binary is being intensely observed using telescopes on Earth to precisely measure its properties before DART arrives.

[link to www.nasa.gov (secure)]

glassesoff

damned
 Quoting: Anonymous Coward 80659637

The firmament will protect you! Unless you are an enemy of the one most high.....
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
 Quoting: Anonymous Coward 80630295


Dumbfuck shill retard from Britain masquerading as a stupid hick to make Americans look fucking stupid is promoting false propaganda.
[link to epic.gsfc.nasa.gov (secure)]
 Quoting: Astromut


If you think that is a photo, I've got a bridge to sell you.
 Quoting: Anonymous Coward 80630295


It's a photo. Deal with it.
 Quoting: Astromut


No, it's not.

It's a collection of "imaging data" composited together to create an "image". An artistic representation.

Quotes from your link:
"These images were created using the bands from EPIC that are within the human visual range. They have been color and brightness adjusted to represent what a conventional camera would produce."

"These images were processed to enhance land features. To obtain the 'enhanced' images we subtracted the atmospheric haze that is caused by air molecular scattering and attenuation of solar light by ozone. The calculations account for Earth's spherical geometry.

To enhance land-surface features, we used a simple logarithmic transformation that replaces each pixel's counts with its logarithm. As a result, low intensity pixel values have been increased relative to the high intensity pixel values. Specific parameters of the logarithmic transformation were selected to approximate a similar procedure used by MODIS. Finally, the procedure has been applied to three EPIC bands: blue (443 nm), green (551 nm) and red (680 nm) to produce a color image.

To avoid some currently unresolved geolocation issues at the edge of the disk, only pixels observed at viewing zenith angle (VZA) less than 75° have been corrected and plotted in the enhanced images. Pixels with VZA > 75° (3.7% of all pixels) have been plotted black.
"

In other words... not a photo. A very tiny change in some of their algorithms produces very different results.

Imaging is not photography. Imaging is artistry.

Computer graphics... effectively a cartoon.

The title of the page even includes "Imaging".

Try again.

Do you have an actual "photograph" of Earth?

Not a digital composite?
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
...


Dumbfuck shill retard from Britain masquerading as a stupid hick to make Americans look fucking stupid is promoting false propaganda.
[link to epic.gsfc.nasa.gov (secure)]
 Quoting: Astromut


If you think that is a photo, I've got a bridge to sell you.
 Quoting: Anonymous Coward 80630295


It's a photo. Deal with it.
 Quoting: Astromut


No, it's not.

It's a collection of "imaging data" composited together to create an "image". An artistic representation.
 Quoting: Anonymous Coward 80630295


Wrong. It's not an artistic representation. Every image taken with a digital camera is a digital image, but that does not make it an artistic representation. The raw data is freely available, which isn't even the case for most consumer grade cameras that do their own processing on the data automatically.
[link to asdc.larc.nasa.gov (secure)]
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
Don't listen to chronic Freemason Jesuit lairs, like Astrophagggot, for example.
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
...


If you think that is a photo, I've got a bridge to sell you.
 Quoting: Anonymous Coward 80630295


It's a photo. Deal with it.
 Quoting: Astromut


No, it's not.

It's a collection of "imaging data" composited together to create an "image". An artistic representation.
 Quoting: Anonymous Coward 80630295


Wrong. It's not an artistic representation. Every image taken with a digital camera is a digital image, but that does not make it an artistic representation. The raw data is freely available, which isn't even the case for most consumer grade cameras that do their own processing on the data automatically.
[link to asdc.larc.nasa.gov (secure)]
 Quoting: Astromut

So... don't include the quotes from my post?

That would be a form of academic dishonesty, since they state specifically that it is imaging (not a photo).

Here's a paper titled "The Earth Polychromatic Imaging Camera on the Deep Space Climate Observatory".

[link to www.osapublishing.org (secure)]

Abstract (feel free to peruse the full paper... if you would like to learn exactly how much EPIC is NOT like a digital camera...)
The Earth Polychromatic Imaging Camera takes images of the Earth in 10 ultraviolet and visible channels. This paper gives an overview of the optical design, calibrations performed, and corrections applied to obtain corrected count rates.

It very much IS an artistic representation... someone "chose" the colour, visual quality and compositing parameters, from a large range of "imaging data".

The raw data is available, but not the code or processes of how they composited it and created the website... at some point (not recorded anywhere that I can see), someone made some "choices" about how the images would look, including the gradient to make the "sphere" object look 3 dimensional.

How is that not artistry?

It is in NO WAY a photo.
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
Did they say binary?! REEEEEEEE!!!!
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
TBC-whocares
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
banana2

Always funny to see AstroMut get butthurt.

You always have to ponder why self proclaimed intelligent people, need to defend their intelligence.

Your wrong Astromut. You Are Wrong
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
Don't listen to chronic Freemason Jesuit lairs, like Astrophagggot, for example.
 Quoting: Anonymous Coward 75401303


Idol1clappaIdol1
Anonymous Coward
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
And what if they fail and divert it to the earth
 Quoting: Anonymous Coward 41173011


Kind of like what happens if they create a 'vaccine' that fails and it accidentally destroys the immune system
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
AstroMut

Can you see debris field from Apophis?

All professional astronomers are saying their is a HUGE debris field.
 Quoting: Anonymous Coward 80266721

Citation needed. No, I have not seen a "debris field." Real life isn't like the movie Armageddon.
 Quoting: Astromut



So your saying nothing in space has debris field with it
 Quoting: Anonymous Coward 80266721

I'm saying asteroids don't have sizeable hill spheres with which to keep a "debris field" of any meaningful size attached to themselves. Anything traveling with the asteroid either hits you WITH the asteroid or misses you entirely. Comets leave behind debris because they're actively producing it. Asteroids only do that shortly after a collision with another object.
 Quoting: Astromut

Astromut, trust the science, did you take the jab?
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
banana2

Always funny to see AstroMut get butthurt.

You always have to ponder why self proclaimed intelligent people, need to defend their intelligence.

Your wrong Astromut. You Are Wrong
 Quoting: Anonymous Coward 80266721


No, I'm not.
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...


It's a photo. Deal with it.
 Quoting: Astromut


No, it's not.

It's a collection of "imaging data" composited together to create an "image". An artistic representation.
 Quoting: Anonymous Coward 80630295


Wrong. It's not an artistic representation. Every image taken with a digital camera is a digital image, but that does not make it an artistic representation. The raw data is freely available, which isn't even the case for most consumer grade cameras that do their own processing on the data automatically.
[link to asdc.larc.nasa.gov (secure)]
 Quoting: Astromut

So... don't include the quotes from my post?

That would be a form of academic dishonesty, since they state specifically that it is imaging (not a photo).
 Quoting: Anonymous Coward 80630295

All photos are images, not all images are photos, but EPIC does take photos of earth in the form of digital images.
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Re: NASA: We Will Try To Divert Binary Near-Earth Asteroid (65803) Didymos...
Luke gives us a warning to all who dwell on the face of the whole earth, we are in the TRAP

Luke 21:34“But watch yourselves lest your hearts be weighed down with dissipation and drunkenness and cares of this life, and that day come upon you suddenly like a trap. 35For it will come upon all who dwell on the face of the whole earth. 36But stay awake at all times, praying that you may have strength to escape all these things that are going to take place, and to stand before the Son of Man.”





GLP