What do Astronomers do?

Galileo at his Telescope
© IMSS - Firenze
Telescopes around the World
Modern astronomers use telescopes all over the world, well away from street lights where the skies are dark and the weather is good. Astronomers from Britain regularly fly out to telescopes in places as far away as Hawaii, Australia, Chile and the Canary Islands.
The Mauna Kea Observatory, Hawaii
Image courtesy of JCMT[

Artists's impression of XMM satellite in orbit
© NASA
All these telescopes are not used to just get nice pictures, but
to make measurements.
"... to explore strange new Worlds ..."
We need these measurements if we are going to be able to understand the universe. Remember that Astronomy is a science - the science of the Universe in the same way that Chemistry is the science of chemicals and Biology is the science of living things. Although we have been studying the sky for thousands of years and we now know an awful lot about the way planets, stars and galaxies work, there are still many important things that we do not understand:
- How did the universe form?
- Will it ever "die"? If so, when?
- How many other stars have planets around them?
- Could those planets have life on them?
- Exactly how do stars like the Sun work?
It is the astronomers' job to try and find out the answers to some of these important questions.
