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.
The Sun is expected to exist as a main sequence star for some 10 billion years, but a red dwarf one tenth its size ought to shine on for a thousand times longer, ten trillion years. In our galaxy, the Milky Way, red dwarfs are the most common type of star. In the vicinity of the Sun, 80% of the stars are red dwarfs.n the Northern Hemisphere, look towards Leo, home of Wolf 359, a red dwarf a tenth the mass of the Sun, and only 7.8 light years away. Observers in the Southern Hemisphere can look to Alpha Centauri, actually a multi-star system one of which is celebrated red dwarf Proxima Centauri.