Term | Definition |
astronomy | study of celestial objects and interstellar space |
astronomer | somebody who studies astronomy |
revolution | one year, celestial object orbiting the sun |
rotation | a planet spinning once on its axis, one day |
orbit | the motion of a path of something |
calander | way to organize time |
day | time it takes for one rotation |
year | time it takes for one revolution |
heliocentric | sun centered theory |
geocentric | earth centered theory |
Tycho Brahe | believed in geocentric theory |
stonehenge | mysteriously placed stones that were for sacrafice |
gaileo | astronomer who invented telescopes |
astrolabe | small device for measuring where a celestial body is |
horizon | where the sky and earth appear to meet |
zenith | imaginary dot over everybody's head |
altitude | angle between celestial object and horizon |
azimuth | imaginary circle around horizon |
celestial sphere | stars in sphere shape around earth |
declination | how far north or south something is on the celestial sphere |
telescope | instrument to observe objects in space |
electromagnetic radiation | energy transferred in electromagnetic waves |