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spartan45

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About spartan45

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  1. The accepted theory is that the Earth/Moon distance increase of 3.78cm per year is due to the tidal bulge towards the Moon being pushed ahead by the Earth’s spin, so causing the bulge’s gravity to pull the Moon into higher orbit. The energy gained by the Moon in this action is a cause of the Earth’s daily spin rate slowing by around 1.4x10-5seconds per year. So let’s test this mathematically. First, to find the energy lost by the Earth: Over the course of one year the increase in the length of a day is about 1.4x10-5seconds. M (Earth Mass) = 5.9726x1024kg R
  2. Objective: To find if an imaginary world is round when travelling on a moving train along it’s equator without prior knowledge that the world is a spherical planet, using the stars, and if necessary other means. Using the Earth as an example, the North Star (Polaris) is probably too low to be visible from the equator even with mean refraction at 34.5 minutes of arc at zero altitude. Instead, a line where the ‘pointers’ of the Great Bear cut the horizon viewed from the Equator would give the Northern axis zenith. For the Southern axis zenith, it’s where the long stem of the Southern Cross cut
  3. Good question. I achieved exposing it’s an illusion that ancients thought the World’s flat. I was educated with the idea that sailors around the time of Columbus’s 1476 voyage across the Atlantic thought the Earth was flat and might fall off the edge. With this mindset I wanted to show how the ancients could have saved themselves the concern by using Thales’ Theorem and Pythagoras Theorem both available c500BC to calculate the radius of the Earth and establish it’s spherical nature. Thanks to the answers from stargazers lounge members to my post I only now realise it was my education at fau
  4. How early could the radius of the Earth be calculated with better accuracy than Newton? Objective is to calculate the radius of the Earth using methods available to the Greeks around the time of Thales of Miletus (c600BC) and Pythagoras (c500BC) and then by enhancing with modern science. The numbers below, allowing for the effect of normal atmospheric refraction, were obtained from distance of sea horizon tables found in nautical tables/almanacs. In ancient times the same results could be obtained by practical observation. With a height of eye of 2.1metres the distance of the sea horizon is f
  5. The Magellan probe launched from the Atlantis shuttle on 4 May1989 sent back the radar image of the Alpha Regio area of Venus in the early 90’s. The seven dome like hills are each about 25km in diameter and 750metres in height. Successive lava eruptions are thought to have formed them. Picture attached. They look similar to the Ceres dome but there may be no similarities on their formation what so ever. Thanks for the interesting post.
  6. This is an excellent post which gives focus to JamesF information link. Using table 1 (page 4) it shows the clock time correction (advance) of Apollo 12 command module versus Earth standard was 5.70345 x 10-4 seconds on splash down. Using table 2 (page 5) it shows the clock time correction (advance) of Apollo 13 command module versus Earth standard was 3.27559 x 10-4 seconds on splash down. The Gravity Probe A figure of (4.5x10-10) x time interval to give the Apollo 17 clock advance appears too small, so calculating from table 1 a figure of (6.85x10-10) x time interval to give the Apollo 17 cl
  7. This is a retype to correct the W to read E on the last line : This interesting question requires an answer covering the two effects influencing the Apollo craft’s clocks. First, general relativity: As you rightly say, as the distance from the Earth increases, the gravity field weakens, having the effect of speeding up the Apollo craft’s clocks. Once at the point in the timeline where the gravity influence between Earth and Moon is crossed the gravity field strengthens due to the Moon ahead. This has the effect of slowing the Apollo clocks. The process is reversed on the return trip. Second,
  8. Thanks for your post, it made me think that perhaps the command pilot of Apollo 17 holds the record for negative time dilation meaning he aged 0.00046 seconds more than those on Earth.
  9. This interesting question requires an answer covering the two effects influencing the Apollo craft’s clocks. First, general relativity: As you rightly say, as the distance from the Earth increases, the gravity field weakens, having the effect of speeding up the Apollo craft’s clocks. Once at the point in the timeline where the gravity influence between Earth and Moon is crossed the gravity field strengthens due to the Moon ahead. This has the effect of slowing the Apollo clocks. The process is reversed on the return trip. Second, special relativity: As the departure velocity relative to the Ea
  10. Good point. In special relativity the twins paradox applies. The problem of deciding which twin moved and which twin stayed still is impossible. However we can say the lengthening of the time interval, due to special relativity, between the launch and splash down measured by the Apollo clocks with respect to the clocks on Earth implied that the moving Apollo clocks slowed down.
  11. I’ve always wondered if the Apollo clocks were slow on Earth clocks at splash down. Objective: To calculate how much time dilation took place on the longest Apollo voyage (Apollo 17) to the Moon and back. First a timeline is required to work out the leg distances travelled. Blast off at 0533z (GMT/UT +0, zone Zulu) 7th December 1972. Elapsed Time Date Time Event 000hr 00m 07th 0533z BLAST OFF (0033r/EST 7th December 1972 Kennedy SC) 000hr 07m 07th 0545z Insert into 167km (90nm) altitude Earth parking orbit for 2 revolutions. 003hr 12m 07th 0845
  12. Great post this one. The idea of all light in the universe occupying one point is a mind boggling concept, and one that I had never heard of before. Of course it makes sense when you think about it, but it's something that can easily go over your head. It makes you realise how connected everything must be.
  13. Is it possible that the solar wind is hiding the effect of big bang expansion? The diagram below shows the Earth’s magnetic field interacting with the solar wind creating ‘bow shock’. Bow shocks are described as similar to the waves that form at the bow of a ship and occur around all magnetic planets. This diagram was inspired after visiting the DTU Space research into Mars’ magnetic field web pages – very interesting reading. The diagram shows the Moon and Earth orbital velocity could be reduced by the solar wind. Indeed the best evidence of this probably comes from the Echo 1, Echo 2, and P
  14. This is to continue exploring the idea that the orbits of the Moon and Earth are increasing due to big bang expansion. The calculation of the Moon’s bbe rate of 2.9cm per annum was posted several months ago and here is the calculation for the Earth: Earth/Sun Distance X Universe expansion rate at one Mega parsec One Mega parsec Average Earth/Sun Distance (1AU) = 149,597,870.7 Km One Mega parsec = 3.08567758 x 1019 Km Universe expansion rate 73.8 Km per second at one mega parsec 1.495978707x 108 X 73.8 Km/s 3.08567758 x 1019 Answer = 3.577924968 x 10-10 Km/s. This answer
  15. Just four days ago (18 March 2015) the Scientific American published details of a mystery dust cloud and aurora on Mars over pockets of magnetic field above areas of possibly permanently magnetised surface crust. This dust cloud, I first saw reported several days ago was at 250 km, but is now at up to 2,000 km above the surface of Mars, probably because of the recent extra strong solar winds. I wonder if the problem of solar radiation could be solved by settling under one of these local magnetic fields. I still think settlement on Mars anytime soon is a no go.
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