Goal of all telescopes: TO BRING AS MUCH RADIATION AS POSSIBLE TO A FOCUS

Types of Telescopes Named because these telescopes bend light. Refracting Telescope Refracting Telescope Named because these telescopes bend light. Uses lenses to focus light Invented 1st: around 1600. The largest practical lens size in a refracting telescope is around 1 meter This limits size and light gathering ability Lens sagging

Types of Telescopes Majority of telescopes used Reflecting Telescope Named because light is bounced off mirrors Robert Hooke built the 1st working model Uses mirrors to focus light. Single mirror Combination of many mirrors Can be much larger then refracting telescopes Majority of telescopes used

Telescopes Found away from cities Lights affect image clarity High Locations Less atmosphere to distort images Used in all wavelengths to find out about the universe

Radio Telescope Radio Wave Telescopes look like huge satellite dishes Radio Wave Collection Interferometry Radio Wave Telescopes look like huge satellite dishes Radio Waves are converted into electrical signals and then stored on a computer. Linking separate telescopes together so that they act as one telescope.

How did we learn about the Moon? 3 Ways 1). Telescopes 2). Probes 3). Human exploration

Moon Our knowledge comes from space probes and human expedition History: Space race between the Soviet Union and the United States. 1957: Sputnik Launched 1961: 1st man in space 1961: Project Mercury 1st U.S. man in space 1962: Project Gemini 2 person crews 1969: Moon Landing Apollo 11 Neil Armstrong and Buzz Aldrin landed on the Moon

Unique Lunar Properties Earth’s Moon One of the largest moons Largest of the inner planets moons Orbits farther away from its planet

Lunar Surface Characteristics Surface of the Moon is very dark Low Albedo Reflects little sunlight Lunar surface varies greatly in temperature No atmosphere Very Hot or Very Cold