For example, a measurement given as 12.14 +/- 0.01 cm is more precise than one given as 12 +/- 1 cm. Higher precision does not necessarily imply higher accuracy. Statistical (random) Uncertainty: This is the inescapable fact that every time you repeat a measurement, you will get a slightly different value.
The earliest sunrise of the month at Athens Eleftherios Venizelos International Airport is 6:01 AM on June 13 and the latest sunrise is 4 minutes later at 6:04 AM on June 30. The earliest sunset is 8:40 PM on June 1 and the latest sunset is 10 minutes later at 8:50 PM on June 28.
Happy Summer! The length of days will reach their zenith Sunday, June 21, when the sun rises at 5:25 a.m. and sets at 8:31 p.m. Over 15 hours long, it is the longest day of the year, aka the Summer Solstice. Because the earth's rotation varies, the day shifts slightly each year, but it always occurs between June 20 and June 22. This year it is June 21. Astronomers have it down to the minute.