A PAIR OF LASER POINTS APPEAR. [relativistic image dopplering] A real spot is depicted moving superluminally along a scattering surface with
vr > c. Two locations of the spot are shown. Although the real spot is moving toward the
lower left, the virtual image of the spot appears to the observer to be moving “backward”
toward the upper right...To date, no clear superluminal spot pair creation or annihilation event has ever been reported. One reason is that the entire phenomenon is virtually unknown. Another reason is that discovery typically requires repeated observations of angularly extended systems....Less well known is the rotational
Doppler shift, proportional to the rotation rate between source
and receiver, multiplied by the angular momentum carried by
the beam. In extreme cases the Doppler shift can be larger than
the rest-frame frequency and for a red shift, the observed fre-
quency then becomes “negative.” In the linear case, this effect
is associated with the time reversal of the received signal, but it
can be observed only with supersonic relative motion between
the source and receiver. However, the rotational case is differ-
ent; if the radius of rotation is smaller than the wavelength, then
the velocities required to observe negative frequencies are sub-
sonic. .. Here we show, using an acoustic source, that a negative rotational Doppler shift is
associated with a handedness reversal of the orbital angular momentum carried by the wave.
https://www.youtube.com/watch?v=lONkazVGuxM
https://books.google.com/books?id=bzPWEAAAQBAJ&printsec=frontcover#v=onepage&q&f=true
Superluminal Spot Pair Events in Astronomical Settings: Sweeping Beams
https://www.space.com/28332-faster-than-light-illusion-cosmic-secrets.html
"Photonic booms happen around us quite frequently, but they are always too brief to notice," Nemiroff said in a statement from Michigan Technological University. "Out in the cosmos, they last long enough to notice — but nobody has thought to look for them!"
Rosanne Di Stefano of the Harvard-Smithsonian Center for Astrophysics, added in the statement: "The concept, although not proven in practice, is quite intriguing,"
....the effect hinge on the interplay between the time it takes for a sweeping light beam to cross an object and the time it takes for the light beam to traverse the depth of the object." Therefore, if the moon were just a flat disc, a photonic boom could not be created across it.
.....
The shadows created by the light of the star passing between the clouds of gas and reflecting off the dust could "create photonic booms visible even for days or weeks," according to the statement.
Specifically, a virtual spot pair creation event will be observed when a real spot's speed toward the observer drops below, while a virtual spot pair annihilation event will be observed when a real spot's radial speed away from the observer rises above 
. Superluminal spot pair events might be found angularly, photometrically, or polarimetrically, and might carry useful geometry or distance information.
Robert J. Nemiroff
Department of Physics, Michigan Technological University, Houghton, MI 49931
nemiroff@mtu.edu
“Virtual” spots, contrastingly, are spot locations perceived as illuminated by a distant observer. Virtual spots are observer dependent and could be considered images of real spots.
...............
superluminal spots with vr > c toward the observer will always appear to move away from the observer. ...information would appear in the opposite time order to the observer than it sent from the beam source.
.................................
https://arxiv.org/pdf/1705.05873
In sum, it is of educational interest that such a common object as a scissors can, in theory, display such an uncommon attribute as superluminal motion. This
counter-intuitive behavior does not violate special relativity and is derivable from straightforward kinematics and Euclidean geometry prevalent in undergraduate
physics curricula.
https://arxiv.org/pdf/1907.04885
First the spacecraft appears to leave for the planet as normal. Next, however, two
additional images of the spacecraft appear on Earth on the Landing Pad, one of which stays
on the Landing Pad, while the other image immediately appears to leave for the planet.
The underlying reason for these strange apparitions is that spacecraft itself returns to Earth
before two images of the spacecraft return to Earth. Therefore, after the spacecraft returns,
the Earth observer sees not only the returned spacecraft, but an image of the spacecraft on
the way out, and an image of the spacecraft on the way back, all simultaneously....
https://arxiv.org/pdf/1505.07489
his might appear odd as the return image arriving at Earth eight years
out shows the ship as further away from Earth – not closer – than the image of the returning
craft that arrived after five years. It therefore appears that this return spaceship is moving
backward in time, as seen from Earth.
For clarity, to recap again, eight years after leaving the Launch Pad, three images of the
spacecraft remain visible from Earth: one image on the Landing Pad, one image on the way
out, and one image on the way back. Both the outbound image and the return image show
the ship appearing further away after year eight than at year five.
Right at the time the spaceship returns to Earth, the number of spaceship images visible
on Earth jumps from one to three. Before this, Eq. (12) shows that both the image of the
spaceship on the Landing Pad and an image of the spaceship returning to the Landing Pad
have yet to reach Earth. Therefore for v in this interval, the spaceship reaching the Landing
Pad marks an image pair creation event.
Similarly, when the spacecraft reaches the planet, both the outbound and the return
images of this event arrive back at Earth simultaneously, as can be seen from Eqs. (10)
and (12). Because no further images of the spacecraft going out or returning exist, these
images then both disappear, leaving only the spacecraft image on the Landing Pad. This
disappearance is an image pair annihilation event. These image pair events are conceptually
similar to spot pair events seen for non-material illumination fronts moving superluminally.
So Jesus is infinitely red-shifted? We can see Jesus but we can never communicate with him? hahaha
"the vertex zips around" superluminally on scissors - with a laser - it would punctuate but with no information communicating across the two sides of paper....
The bat signal across the wall is superluminal TO ITSELF but to nothing else....
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