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 Dwarf Stars. 1  Lifetime: 4 - 17 billion years. 2  Evolution: early, middle. 3  Temperature: 5,000 - 7,300 Â°C. 4  Spectral Types: G, F. 5  Luminosity: 0.6 - 5.0. 6  Radius: 0.96 - 1.4. 7  Mass: 0.8 - 1.4. 8  Prevalence: 10%.