Intro To Astronomy
What is astronomy?
The studies of the cosmos beyond planet earth.
Was did we believe was the center of the solar system prior to the 1500's?
Who is Ptolemy?
The distance between two waves
wavelength
Infrared, Ultraviolet, and Gamma are all examples of _______, even though we do not see them
Light
A cycle which includes new moon, first quarter, full moon, third quarter, waxing and waning crescent and waxing and waning gibbous.
What are the phases of the moon?
He developed the first Sun-centered scientific model of the solar system.
Who is Copernicus? (Galileo also accepted)
What does "conservation of energy" mean?
Energy cannot be created or destroyed.
What is the spectrum of light wavelengths called?
The electromagnetic spectrum
Without this, the Earth would not have seasons.
What is axis tilt?
What do scientists suspect the early earth looked like?
Nothing in the universe moves faster than this.
The speed of light
This is the reason something moving away from us looks redder.
What is doppler shift/Red Shift/Increasing Wavelengths
Because of this, the further away a star is, the further we look back in time.
What is the speed of light?
Name 2 differences between the atmosphere of the prebiotic earth, and that of the earth today.
O2 levels, CO2 levels, SO2
This force keeps the planets in their orbits.
What is gravity?
Give an example of information we can learn by looking at the wavelength of light emitted by an object in space
Temperature/Gasses in atmosphere/color of planet
This occurs when the Moon sits between the Earth and the sun, blocking out the sun's light.
What is a solar eclipse?
Name two things that have remained relatively constant from the prebiotic earth's atmosphere to today's atmosphere
H2O levels, Methane levels, Nitrogen levels
This movement on Earth is caused by the interaction of the Sun's and Moon's gravitational pull.
What are tides?
How far is light capable of traveling in 6 months? Must include units in your answer.
.5 light years