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Mendel reacted to Gary C's post in the thread Parallax Illusion, Disbelief and Mysterious Hovering Planes with
Like.
With a typical landing speed for a 737 at around 130 knots, this also neatly demonstrates the unreliability of the casual observer's claims about the estimated speed of any flying objects. -
Mendel reacted to FatPhil's post in the thread Parallax Illusion, Disbelief and Mysterious Hovering Planes with
Agree.
"Most cases are due to parallax, but planes can stand still in the air when the headwind matches their ground speed." Their *ground* speed?!? Wouldn't that be zero in a "hover"? -
JMartJr reacted to FatPhil's post in the thread Parallax Illusion, Disbelief and Mysterious Hovering Planes with Like.
"Most cases are due to parallax, but planes can stand still in the air when the headwind matches their ground speed." Their *ground* speed?!? Wouldn't that be zero in a "hover"? -
JMartJr reacted to Gary C's post in the thread Parallax Illusion, Disbelief and Mysterious Hovering Planes with Like.
With a typical landing speed for a 737 at around 130 knots, this also neatly demonstrates the unreliability of the casual observer's claims about the estimated speed of any flying objects.
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John J. replied to the thread Transients in the Palomar Observatory Sky Survey.I couldn't find any obvious connection between Sedona and nuclear weapons testing or development. Wikipedia, Sedona, Arizona https://en.wikipedia.org/wiki/Sedona,_Arizona Maybe the nuclear tests in the 1950s and after in the American southwest... -
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Gary C reacted to cloudspotter's post in the thread Photos of Clouds and Skies (That you took yourself) with
Informative.
That's Virga in the second photo. Precipitation that evaporates before it reaches the ground -
Gary C reacted to Todd Feinman's post in the thread Photos of Clouds and Skies (That you took yourself) with
Funny.
You witnessed the double-occultation of Jupiter! By Jove! Rare indeed.. -
Gary C reacted to FatPhil's post in the thread Photos of Clouds and Skies (That you took yourself) with Funny.
Next time, fly a kite in front of the cloud to show it who's boss.
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Gary C reacted to JMartJr's post in the thread Photos of Clouds and Skies (That you took yourself) with Funny.
I went out yesterday to see if I could spot the occultation of Jupiter by the moon. Being a very thin sliver of a crescent moon, in full daylight, this was not going to be easy, especially with a bit of high altitude haze (not apparent in this...
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Todd Feinman replied to the thread Parallax Illusion, Disbelief and Mysterious Hovering Planes.Seems like that would be very bad news for all on board. -
Todd Feinman reacted to FatPhil's post in the thread Parallax Illusion, Disbelief and Mysterious Hovering Planes with Like.
"Most cases are due to parallax, but planes can stand still in the air when the headwind matches their ground speed." Their *ground* speed?!? Wouldn't that be zero in a "hover"?
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Todd Feinman reacted to Gary C's post in the thread Parallax Illusion, Disbelief and Mysterious Hovering Planes with Like.
With a typical landing speed for a 737 at around 130 knots, this also neatly demonstrates the unreliability of the casual observer's claims about the estimated speed of any flying objects.
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Gary C reacted to Todd Feinman's post in the thread UAPs, Bigelow, and the "Invisible College" with Funny.
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Gary C reacted to MonkeeSage's post in the thread UAPs, Bigelow, and the "Invisible College" with Informative.
Robert Bigelow recently started a podcast with George Knapp which is hosted on the youtube channel of CBS affiliate KLAS 8 in Las Vegas (where Knapp has worked since 1981). In the fifth episode, the current owner of Skinwalker Ranch and producer...
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Gary C replied to the thread Parallax Illusion, Disbelief and Mysterious Hovering Planes.With a typical landing speed for a 737 at around 130 knots, this also neatly demonstrates the unreliability of the casual observer's claims about the estimated speed of any flying objects.
