clair002

O'ahu seen from Kaua'i There are a couple of these floating around the Flat Earth globe. Terry Robinson has a video Flat Earth Proof: Oahu seen from Kauai more than 90 miles away In this video he shows two different views #1 is near Wailua River Over which seems to be very near 22.046347° -159.354560° (telephone pole and street sign match his video).  The claim is this is from 200' and Google Earth estimates 197' so this is also a good match. Terry shows the islands being "108 miles center to center" -- however, this location is about 80 miles from the Kaena Point area (along Satellite Tracking Station Road), ~80.7 miles from a 1907' peak, and ~86.3 miles from Mount Ka'ala peak (4026') on Oahu. So 108 miles, while accurate for center-to-center is irrelevant -- why give this value? The Hidden height for these locations are 2157'-2631' / 2207'-2690' / 2622'-3185' giving the range as between 'Standard Refraction' and ra...

I've yet to meet a Flat Earther who can correctly explain the actual model for how Moon Phases work. Many of them will tell you some variation of "science says Moon Phases are caused by Earth's Shadow so how do we see the Moon and Sun in the Sky at the same time, LOL". Yikes. If Moon phases are caused by the Earth's shadow, how do you explain the light-dark pattern of the gibbous phases? #cwuphysics — Bruce Palmquist (@brucepalmquist) October 8, 2017 Why are the moon phases supposed to affect us if it is just the earth’s shadow on a reflection and the sun shines on us all day just thinkin — Demogorgonzola (@AgainstCody) October 7, 2017 Here are a couple of videos that I think help to correctly explain the model that Moon Phases are caused, not by Earth's shadow on the Moon, but by the simple position of the Moon relative to the Earth and Sun. Please note -- these demonstrations are not to scale -- they are only meant to show how the model works for the specifi...

Cool paper on measuring the distance to the moon by comparing the angular size: The simplest method to measure the geocentric lunar distance: a case of citizen science The essence of this methodology is that the distance to the Moon changes over the course of the 6 hours between when the moon is near the horizon and near zenith sufficiently for us to measure this change in the angular size of the Moon. From Figure 1 in the paper we're discussing the following geometry.  Please note that it is the observer that is suggested to be moving with the rotation of the Earth and not the Moon. For ideal conditions (an observer near the Equator at the Equinox) the change in angular size would be expected to be simply: Δϕ/ϕ ~ Rₑ/D ~ 1/60 ~ 1.7% Therefore, if the Earth radius is ~3959 miles (6371 km) and rotating we would expect to observe a 1.7% change in the size of the Moon over this span. The paper gives the more exact formula that also takes into account the observer latitude and the lunar...

In ' History of Airborne and Shipboard Periscope Detection Radar Design and Developments ' we see the following in a discussion about radar horizon: Not surprisingly, the radius of the earth enters into calculations of the geometrical range to the horizon; calculations of the range to the radar horizon account for refraction by assuming that the radius of the earth is 4/3 as great as its actual value. For sensor altitudes small in comparison with the radius of the earth, the distance to the radar horizon in nautical miles is 1.23 times the square root of the altitude in feet. Thus, for a typical airborne PDR altitude of 500 feet, the range to the radar horizon is 27.5 nmi, and for a nominal mast-mounted shipboard antenna height of 70 ft, it is about 10 nmi. Note that common surveillance radar heights for a U.S. cruiser or destroyer are 100-120 ft, and, for an aircraft carrier, 150-180 ft. Just another nail in the coffin of claims that nobody ever takes curvature of the Earth in...

This Flat Earther was telling me that I don't understand the Heliocentric/Globe model because we should see all phases of the Moon at the same time.  Say what!? Mainstream science believes all eight moon phases occur at the same time regardless of location. So try again — Think For Yourself (@ThinkForYourse5) November 13, 2017 LOL -- okay.  After some discussion (and research on my part) I realized his misunderstanding comes from the FAA FAR/AIM manual  (which is also copy & pasted on other sites) which reads: For practical purposes, phases of the Moon and the percent of the Moon illuminated are independent of the location on the Earth from where the Moon is observed. That is, all the phases occur at the same time regardless of the observer's position. And ok, I guess if you don't understand science at all you could misread the " phases occur at the same time " but since it explicitly says " phases of the Moon and the percent of the Moon illuminated are ...

Another extremely clever Flat Earth 'proof' the Earth is Flat... Run these numbers please, Dark Star pic.twitter.com/dyBRcEaCKd — Think For Yourself (@ThinkForYourse5) November 12, 2017 Ok... /Google for source image/ Original by  Dave Cawkwell on Blogspot Confirms it is from Boulogne, France -- Dave Cawkwell says he is about 10 meters up, I think a little higher but I'll go with 10 meters (32 feet). Based on the position of the wall we appear to be somewhere very near the location marked below, which puts us 29.5 miles away -- not 31 miles away -- and 2 feet higher than the Meme. What else?  Oh yeah, those are the Cliffs West of Dover which puts them up as high as 437 feet, not just 350 (and  this area is 142 meters high ) And once we account for Refraction, completely ignored in the original. So I find that we expect about 252 feet of the Cliffs to be hidden leaving about 185 exposed. I also see a small band of an inferior mirage line running along the bottom...

NASA posted this today: #TBT to November 9, 1967, when a 70mm camera perched aboard an uncrewed Apollo 4 flight orbiting Earth captured this breathtaking view: https://t.co/KI5A7RTdII pic.twitter.com/QEqn2DaZDi — NASA (@NASA) November 9, 2017 I liked to grab the original scans and what raw data is available from EOL which we can find here for frame AS04-1-580  - so NASA cropped, cleaned up the image, and rotated it for presentation. Image Caption: Coastal Brazil, Atlantic Ocean, West Africa, and Antarctica, looking west, as seen from the earth-orbital Apollo 4 (Spacecraft 017/Saturn 501) unmanned space mission. This picture was taken when the Spacecraft 017 and the Saturn S-IVB (third) stage was orbiting the earth at an altitude of 9,544 nautical miles. That's ok - we can do the same thing very easily.  All I've done here is one 90 degree rotation, lowered the brightness, slight increase in saturation, and adjusted the white point so the clouds are whiter.  It's the ex...