He was on to a brilliant idea about how parallax can be used to estimate some astronomical distances.
Stellar Parallax
Ptolemy had no way to detect or measure the parallax of stars, and was completely unaware of it. So the lack of any explanation was no problem.
Galileo's family was from nobility on his mother's side, but his father was lower in status. So, Galileo belonged to nobility but was not rich.
Maybe so when one of his family get sick,galileo can help to cure them.
The Parallax View was created on 1974-06-14.
Stellar Parallax
The Jovian moons. Galileo had little evidence for the heliocentric theory, which was later (in the 18th century) generally accepted as correct after the laws of motion and the law of gravity showed that the Sun is by far the most massive object in the solar system and therefore must be at the centre. Galileo did not have the other major piece of evidence supporting the heliocentric theory, which is the parallax shown by relatively close stars as the Earth moves round its orbit. Parallax is extremely small and was impossible to observe in Galileo's time, and this was used to support the idea that the Earth is at the centre. Bessel made the first measurements of parallax in the 19th century.
astoronomy
parallax is a planet
Ptolemy had no way to detect or measure the parallax of stars, and was completely unaware of it. So the lack of any explanation was no problem.
Galileo I am not so sure he was the first, but he is the most famous.
simply speaking, systematic errors are those you can improve on( so if you have a systematic error, its probably your fault). Random errors are unpredictable and cannot be corrected. A parallax error can be corrected by you and if there is a parallax error, its probably your fault.
they look at the star in, say, spring, then fall or summer then winter. we have to be on opposite sides of the star to see the parallax, so it takes about a year
Parallax - comics - was created in 1994.
Advent Parallax was created in 2008.
Parallax Software was created in 1993.
Parallax bars are used in photogrammetry and remote sensing. with the use of the principles of parallax and refraction, parallax bars are used to measure the heights of buildings and other features.