Examples from literature

• Astronomers call it mass transfer, and it happens when one star pulls away the mass of the second star. 
• Astronomers, the scientists who study space and planets, decided that Pluto was too small and too far away from our sun to be called a planet. 
• Davidson, an astronomer, wanted to see an eclipse. 
• Herschel, a British astronomer born in Germany in 1738, spent hours in his workshop, building mirrors for his telescope. 
• In 1783, English writer and astronomer, John Michell, guessed that there were black holes. 
• In 1960, a young radio astronomer named Frank Drake started the first search for signals from other solar systems. 
• Recently, astronomers watched a star falling into a black hole. 
• The astronomer used a telescope to see the planet. 
• The planet moves extremely fast, orbiting its star every two hours, and astronomers believe that it used to be part of a double star. 
• This black hole is about three billion light-years away from the Earth, so the astronomers were watching something which happened a long time ago.