Marshall Eubanks
@marshall-eubanks.bsky.social
A physicist with a lead role in creating two Very Long Baseline Interferometry (VLBI) systems, for JPL & the USNO. Now Chief Scientist at Space Initiatives Inc, developing picospacecraft for use in deep space. Asteroid (6696) Eubanks is named in his honor.
Well, it is hyperbolic - and moving so fast its trajectory is pretty straight.
November 29, 2025 at 4:02 AM
Well, it is hyperbolic - and moving so fast its trajectory is pretty straight.
Well, I don't think it's specific to hyperbolic trajectories, but this one is pretty straight, and that helps.
I think you need a fair amount of "heavy dust" (say, 1 mm size particles) _and_ the right view angles to see an antitail like this, which is why it is relatively rare.
I think you need a fair amount of "heavy dust" (say, 1 mm size particles) _and_ the right view angles to see an antitail like this, which is why it is relatively rare.
November 29, 2025 at 3:08 AM
Well, I don't think it's specific to hyperbolic trajectories, but this one is pretty straight, and that helps.
I think you need a fair amount of "heavy dust" (say, 1 mm size particles) _and_ the right view angles to see an antitail like this, which is why it is relatively rare.
I think you need a fair amount of "heavy dust" (say, 1 mm size particles) _and_ the right view angles to see an antitail like this, which is why it is relatively rare.
Sorry, here is a reference
ui.adsabs.harvard.edu/abs/1974Icar...
ui.adsabs.harvard.edu/abs/1974Icar...
On the nature of the anti-tail of Comet Kohoutek (1973f) I. A working model
The anomalous tail of Comet Kohoutek is studied on the basis of the dust-tail theory formulated by Finson and Probstein for the case of negligibly small emission velocities. Theoretical photometric pr...
ui.adsabs.harvard.edu
November 28, 2025 at 10:46 PM
Sorry, here is a reference
ui.adsabs.harvard.edu/abs/1974Icar...
ui.adsabs.harvard.edu/abs/1974Icar...
And, no, I don't think it increases the chances of 3I / ATLAS being artificial.
November 28, 2025 at 10:41 PM
And, no, I don't think it increases the chances of 3I / ATLAS being artificial.
There are two kinds of comet anti-tails, one a perspective effect and the other, a true anti-tail. The latter is thought to be from a relatively heavy dust particles emitted by the comet, say 1 mm in diameter, which drift slowly away.
November 28, 2025 at 10:40 PM
There are two kinds of comet anti-tails, one a perspective effect and the other, a true anti-tail. The latter is thought to be from a relatively heavy dust particles emitted by the comet, say 1 mm in diameter, which drift slowly away.
Of course, this condition was first written up by Dr. Seuss, M.D., who wrote the classic review paper, On Beyond Zygomycosis, describing rare and unusual diseases requiring new letters of the alphabet.
November 28, 2025 at 10:32 PM
Of course, this condition was first written up by Dr. Seuss, M.D., who wrote the classic review paper, On Beyond Zygomycosis, describing rare and unusual diseases requiring new letters of the alphabet.
Reposted by Marshall Eubanks
In 2022 I wrote a big feature about single-event upsets for BBC Future. Covers various possible examples (they're notoriously hard to prove)
Aircraft are much more exposed that tech at ground level.
The computer errors from outer space - BBC Future share.google/tvD5nUOpFRHa...
Aircraft are much more exposed that tech at ground level.
The computer errors from outer space - BBC Future share.google/tvD5nUOpFRHa...
The computer errors from outer space
The Earth is subjected to a hail of subatomic particles from the Sun and beyond our solar system which could be the cause of glitches that afflict our phones and computers.
share.google
November 28, 2025 at 9:54 PM
In 2022 I wrote a big feature about single-event upsets for BBC Future. Covers various possible examples (they're notoriously hard to prove)
Aircraft are much more exposed that tech at ground level.
The computer errors from outer space - BBC Future share.google/tvD5nUOpFRHa...
Aircraft are much more exposed that tech at ground level.
The computer errors from outer space - BBC Future share.google/tvD5nUOpFRHa...
frymnblal is a medical condition so rare and unusual a new letter of the alphabet had be created to describe it. Twitter doesn't yet have this letter, so I have to approximate it here.
November 28, 2025 at 5:52 PM
frymnblal is a medical condition so rare and unusual a new letter of the alphabet had be created to describe it. Twitter doesn't yet have this letter, so I have to approximate it here.