How Have Science Measured The Distanced Between Earth And The Moon.?

Update:

Peter Gore Seer,

Science Can Measure Huge Distance But The Figures Can Not Be Challenged, Or Can They,

Update 2:

The Speed Of Light How Is It Measured, Aliens Dont Measure The Speed, Its Relivent, Time In Light Speed Is More Relevent, Or Not

Update 3:

A Known Fact Our Time Comes From The Movments Of Planets, ALIENS Live In A Different Part Of The Universe, So Assuming They Use There Planets As Time And Movement, Which Is Far Different, Fascinating.

Update 4:

Perhaps They Live Far Longer Than Humans.

Update 5:

I Am Still Fascinated By The Measurement Of The Temps?Radiation Recorded Which Is Out There The Big Bang And Stars Colliding, Must Be Creating Nuclear Energy In Mass Since The Begging Of Time, Is Science Saying These Waves Have Not Reach Us Yet But Are Coming.

Update 6:

Ho Dear I Am Banned From Commenting On Moon Landings, I Know For Fact That The CIA Jumped Down Quick On Those People Who Spotted Fake Pictures, And Made Life Very Difficult For Them. And Tried Accusing Them Of Making A Conspiracy, They Were American Threw And Threw,

Update 7:

SABIANS Worked Out The Distancies Of The Planet's, But Miles Were Not Used , Thats Clever

23 Answers

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  • 9 months ago

    The distanceded to the moon averages 238,857 miles.

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  • Mark
    Lv 7
    9 months ago

    Originally, via calculations (I'll simplify it, but knowing ho far the moon must be from Earth if it almost perfectly covers the sun in total solar eclipses), and more recently (since the 1950s) by a laser beam short from Earth, bounced to the lunar surface, and timed as to when it came back.

    • Peter8 months agoReport

      Peter Gore Seer,
      But Can A Laser Reach The Surface Of The Sun?.

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  • 9 months ago

    A Laser Beam bounced off a Mirror left by Apollo !!

    Kind of answers 2 questions btw

    4.5 Seconds to the Moon at the Speed of Light

    • Peter8 months agoReport

      Peter Gore Seer,
      I Have Only Bean Once To The Moon It Seemed Minutes, But A Lie Detector Would Be Needed, As I Dont Believe The Moon Landing, I Am Willing

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  • 9 months ago

    There are laser reflectors left there by astronauts and observatories bounce light off them and time it.

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  • 9 months ago

    There are various ways to do it. One is the same method often used on Earth: triangulation. Another is to use lasers. Come to thing of it, lasers are used for measuring on Earth, too. By the way, the distance from the Earth to the Moon varies. The Moon does not orbit in a perfect circle. Furthermore, the Moon is slowly moving away from Earth. Your "updates" make no sense. For the first one, yest the figures can be challenged, but every real attempt to do so resulted in verifying the most recent measurements. Over time, technology does progress and gives us better tools to make measurements, so there are some minor corrections that occur along with the relative positions of Earth and Moon at the time of measurement. The others about aliens are completely without sense.

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  • Clive
    Lv 7
    9 months ago

    Why can't you even spell your question?

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  • 9 months ago

    Back in the days of Galileo, it was about the math, good to within a few thousand feet. Since Apollow 11, and laser reflectors, now down to a few centimeters.

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  • 9 months ago

    Long time ago:

    By having two observers (A and B) separated by a known distance (thousands of kilometres), observing the Moon simultaneously, relative to fixed stars, they can tell the parallax effect (the angle "M" in the ABM triangle. Relatively easy calculation. Before telescopes, this was not as accurate as today, but it still gave a general idea (they knew that the Moon was way out there, well beyond the atmosphere).

    Two thousand years ago:

    Triangle MSE is the triangle formed by the Moon, the Sun and Earth;

    by observing the difference between the position of the Moon (M) (relative to the fixed stars) between First Quarter (90-degree angle at the Moon - angle EMS) and quadrature (90-degree angle at Earth - angle MES), the Greek geometers were able to determine that the Sun was hundreds of times further away than the Moon.

    Their results were close to 200 times - the real value is around 400 times -- not bad for observations taken without telescopes.

    Since then, basic geometry and better instruments (telescopes) gave better results.

    Also, you can bounce radio waves (and later, radar waves) on the Moon and measure the time between the transmission and the echo coming back.

    Today (since 1969) we can add bouncing laser lights on retroreflectors left on the Moon by the American astronauts and the Soviet landers.

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  • Marduk
    Lv 7
    9 months ago

    VERY LONG tape measure.

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  • 9 months ago

    the most accurate measurement was via a radar/laser reflector one of the Apollo missions left on the moon.

    But there are other methods. The orbit time is directly related to the orbit height and that provides a method, measure the orbit time and do some calculations.

    The Moon's average orbital distance is 384,402 km (238,856 mi)

    As to the speed of light, the reference provides many methods. Some easy enough that high school students can perform them.

    Your two updates make zero sense, sorry.

    • ...Show all comments
    • PhotonX
      Lv 7
      9 months agoReport

      Or at least drop this sophomoric affectation of capitalizing every f*cking word. If you want people to respond to your questions, senseless or not, it's stupid to intentionally make them harder to read.

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