Solar System patters

Used a mural quadrant to measure the positions of the planets and stars

Was one of the first people to use a telescope and observe celestial bodies

Developed the theory of a sun centered universe

An eclipse in which the sun is obscured by the moon

The time it takes the earth to spin on its axis

Reflecting telescope

Proved the existence of galaxies other than the Milky Way

Refracting telescope

An instrument that gathers electromagnetic radiation and concentrates if for better observation

All of the frequencies or wavelength of electromagnetic radiation

developed the theory of an Earth centered universe

Showed that planets and moons stay in orbit due to gravity

Astronomy is the study of

Apparent brightness (magnitude) of a star is how bright a star is/ distance from the earth

What come from the earth's changing position with regard to the sun

An eclipse in which the moon appears darkened as it passes into the earth's shadow

What is the time it takes the moon to orbit the earth

What is the time it takes the earth to revolve around the sun