BOSTON â President Obama signed an executive order on Monday requiring federal contractors to provide up to seven days of paid sick leave a year, even as he accused Republican congressional leaders of endangering the economy and Republican presidential candidates of undercutting American workers.OSTON â President Obama signed an executive order on Monday requiring federal contractors to provide up to seven days of paid sick leave a year, even as he accused Republican congressional leaders of endangering the economy and Republican presidential candidates of undercutting American workers.
A dwarf star is a star of relatively small size and low luminosity. 1  Most main sequence stars are dwarf stars. The term was originally coined in 1906 when the Danish astronomer Ejnar Hertzsprung noticed that the reddest starsâclassified as K and M in the Harvard scheme could be divided into two distinct groups.
Yellow dwarfs are a class of Main Sequence star that includes the Sun (Sol). These stars are yellow stars with. spectral class G. Sol: The Sun is a yellow dwarf star (spectral class G2 V) with a mass of 1.9891 x 10^30 kg (about 2. thousand million billion billion tonnes) and a diameter of 1 392 000 kilometres and a luminosity of 3.83 x 10^26. watts.