astronomernoun [ C ]uk /əˈstrɒn.ə.mər/ us /əˈstrɑː.nə.mɚ/
- 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.