[DOC] [TLE] Ole Roemer and the Speed of Light [PAR] Roemer measured the speed of light by timing eclipses of Jupiter's moon Io. In 
this ... In 1676, the Danish astronomer Ole Roemer (16441710) became the first 
... Roemer knew that the true orbital period of Io could have nothing to do with the
... [DOC] [TLE] Ole Rmer - Wikipedia [PAR] Cassini made an announcement to the Academy of ... trouv par M. Roemer de l'
Acadmie des sciences, ... of Paris, where the Danish astronomer happened to 
be working, commemorates what was, in effect, the first measurement of a 
universal quantity made on this planet. [DOC] [TLE] Rmer's determination of the speed of light - Wikipedia [PAR] Rmer's determination of the speed of light was the demonstration in 1676 that 
light has a finite speed, and so doesn't travel instantaneously. The discovery is 
usually attributed to Danish astronomer Ole Rmer ... Rmer's theory was 
controversial at the time he announced it, and he never convinced the director of 
the Royal... [DOC] [TLE] PhysicsLAB: Light Properties [PAR] The first investigation that led to a determination of the speed of light was 
performed in about 1675 by the Danish astronomer Olaus Roemer. ... While the 
earth was moving away from Jupiter, the measured periods were slightly longer 
than... [DOC] [TLE] Speed of Light History [PAR] By measuring the elapsed time until Galileo saw his assistant's light and knowing 
how ... In 1675, the Danish astronomer Ole Roemer noticed, while observing... [DOC] [TLE] Historic Timeline - The Villages Astronomy Club [PAR] 2,000 BC: First solar-lunar calendars developed in Egypt and Mesopotamia. ... al-
Fazari allowing precise measurement of the positions of stars and planets. ... 
1609 : Kepler's (from Germany) First and Second Laws of Planetary Motions are 
announced. ... 1675 : Danish astronomer Ole Romer measures the speed of light. [DOC] [TLE] CASSINI, RMER AND THE VELOCITY OF LIGHT [PAR] The Danish astronomer Olaus Rmer (1644-1710) discovered the velocity of 
propagation of ... two emersions of the first satellite out of Jupiter's shadow; in .... 
accurate measurement of this velocity by Lon Fou- ... August by means of a 
public announcement about the ... same time a method to build tables in which 
the true. [DOC] [TLE] [1.0] The Invention Of The Telescope - Vectors [PAR] Dec 1, 2014 ... From ancient times astronomers had carefully watched the heavens, but though 
... The "quadrant" was one of the devices used to measure celestial latitudes. ... 
They soon became popular and led to the first true optics industry. ..... company, a 
Danish astronomer named Olaus Roemer (1644:1710) analyzed... [DOC] [TLE] Newsletter/01/titre [PAR] Oct 12, 1996 ... Following this the real challenge of beginning the work of the EAAE took a first 
step ..... If the measured period is longer, we can conclude that the speed of light 
is finite. ... The young Danish astronomer, Olaus Roemer, helped him. ... Roemer 
announced to the << Academie >> that the eclipse of Jupiter's first... [DOC] [TLE] History of the Speed of Light Experiments - Barry Setterfield [PAR] Ole Roemer, born in Denmark on September 25, 1644, had begun studies in ... In 
1675, he discovered that the epicycloid was the best shape for teeth in gears ... it 
was now theoretically possible to measure the speed of light, and determine ... 
Cassini published the first reliable times for these astronomical events.5 Roemer
... [DOC] [TLE] A posse, ad esse, ad eundem |    [PAR] Aug 28, 2014 ... French astronomer who first accurately measured the length of a degree of a ... In 
1675 he made the first recorded observation of barometric light, the light .... Paris 
in 1672 accompanied by the young Danish astronomer Ole Roemer. ... In 
September, 1676, he announced at a meeting of the Paris Academy... [DOC] [TLE] Scientific Method, Statistical Method and the Speed ... - Project Euclid [PAR] ful examination of the first scientific study on the speed of light carried out by A. A. 
... or measuring the properties of populations of .... saying that if it were true

Question: In 1675 Danish astronomer Olaus Roemer announced the 1st real measurement of the speed of this
Answer: Light