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For example, if a ruler's smallest mark is 0.1 cm, and 4.5 cm is read, then it is 4.5 (±0.1 cm) or 4.4 cm to 4.6 cm as to the smallest mark interval. However, in practice a measurement can usually be estimated by eye to closer than the interval between the ruler's smallest mark, e.g. in the above case it might be estimated as between 4.51 cm ...
Kepler-9 is located in the constellation Lyra that lies some 632 parsecs away from Earth. With a mass of 1.07 M ☉ and a radius of 1.02 R ☉, Kepler-9 is almost exactly the same size and width of the Sun, being only 7% more massive and 2% wider.
HD 984 is a F-type main-sequence star located in the equatorial constellation Cetus. It is a young star, estimated 30 to 200 million years old, and is orbited by a brown dwarf companion. Parallax measurements by the Gaia spacecraft imply a distance of 150 light-years (46 pc) to HD 984.
Barnard's Star b: 0.00116 ± 0.00016 3.153 0.0229 ~400 radial vel. 5.9629 ± 0.0004 0.162 ± 0.007 3195 ± 28 The closest exoplanet around a solitary star. Also located in the second closest star system to the Sun, after Alpha Centauri. [6] Not to be confused with the disproved planet Barnard's Star b of 2018, which shared the same name. BD+00 444b