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What is astronomy
- 2. What is Astronomy Astronomy is the study of anything outside the Earth’s atmosphere.
- 3. How do astronomer study the sky? • Binoculars • Telescopes • NASA Probes • Radio • Satellites
- 4. How many Astronomers are there? • Professional Astronomers - 15,000 Worldwide • Amateur Astronomers - 300,000 in United States Alone
- 5. How did Astronomy start? At first it was just a man looking at the sky to track the sun. He wanted to know when the seasons would start and end to let him know when to plant and harvest.
- 6. What does an Amateur Astronomer do? • Study sky through observation • Memorize Constellations • Watch for changes • Spot asteroids and comets
- 7. Asteroid Circling the Earth
- 8. Is it worth it for the Amateur Astronomer? Yes!!! Astronomy is one field where amateur have, and still do, make significant contributions. Many Professionals, with all the technology available today, hardly even look at the sky.
- 9. What are the areas of study in Astronomy? • Observational Astronomy • Celestial Mechanics • Theoretical Astronomy • Subfields
- 10. I Zwicky 18 Galaxy – Credit: NASA
- 11. Observational Astronomy • Optical Astronomy – Can be done by amateurs. Just looking at the sky. • Ultraviolet Astronomy – Looking at sky in the ultraviolet wavelengths • X –Ray Astronomy – Looking at sky be observing x-rays. • Gamma Astronomy – Uses satellites to observe the gamma rays strike the atomosphere.
- 12. Celestial Mechanics This involves working out the paths of the planets and moons to know how everything will travel, and to know where it will be in the future. To send a probe to another planet, we need to know where it will be in the future.
- 13. Theoretical Astronomy This involves figuring out theories to fit the data that the astronomer has. As more data is received, if it does not fit in the present model, the model must be adjusted.
- 14. Some Subfields • Study of the Sun • Study of Solar Systems • Study of Galaxies • Study of Black Holes Almost every part of the skies had a group studying it, and trying to figure out how it works.
- 15. An Observation of the Sun
- 16. What is Astronomy? When you look up at the sky and wonder, you are on the first steps to practicing astronomy and becoming an astronomer.
- 17. More Resources What is Astronomy?