Part A The chart below lists six stars. Research the luminosity, distance from Earth, and surface temperature of

each star. Make sure to research credible sites, such as nasa. gov, to complete your chart. Distances

should be given in light years and temperatures given in Kelvin, Luminosity (L) is how bright something is

in human eyesight. As you conduct your research, look for the luminosity of each star relative to the Sun

(Therefore, the luminosity of the Sun is 1), If your sources give a fraction for luminosity, convert the

fraction into a decimal

number. Use your research to complete the chart,

B 1 9 x 8, Font Sizes AA EE 1

EMV

Star Name

Distance from Earth (light years) Luminosity in comparison to sun surface Temperature (Kelvin)

Sun

Alpha Centauri

Sirius B

Barnard's Star

Sirius A

Proxima Centauri

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).