Science – Lesson 95
In my Astronomy lessons I have been learning about telescopes, astrophotography, and astronomers. Here is a brief review.
First I learned about what astronomy was. Astronomy is the study of stars, planets, moons, galaxies and other objects in space. Astronomy studies their movements, and placement in the universe. We use those objects in space for navigation and try and understand our world in space.
Next we learned how telescopes and binoculars work. Telescopes have a primary lens or mirror that reflects or focuses light that you would not be able to see on your own in order to make the objects appear closer.
Astrophotography is taking pictures of space. I learned how to make the pictures look clear and how to set up your camera to be able to see the stars in different settings. You want to leave your shutter open very long in order to collect enough light to see stars which are very far away. If you leave the shutter open long enough the stars appear as streaks across the sky because the earth is spinning and rotating around the sun.
Ptolemy, Copernicus, Galileo Galilei, Kepler (mathematician) and Sir Isaak Newton were astronomers that discovered how the planets and stars rotate around the sun and not the earth.