Moon
It takes the moon 29.5 days to go through all of its cycles called...
Synodic Month
What do we call the time it takes for a star to rotate around earth?
Sidereal day
How much is the Earth's axis tilted?
23.5 degrees
How are light waves different than all other waves?
They do not require a source.
What was Galileo's big contribution to the astronomy field?
Invented the telescope
What causes a lunar eclipse? Solar eclipse?
Lunar: the moon moves through earth's shadow
Solar: the moon is between the sun and earth
What do we call the time is takes for the moon to return to the same position in the sky relative to the stars?
Sidereal Month
What is the Earth's core mostly made out of?
Iron and Nickel.
What do magnetic fields exert a force on?
Currents
What were Galileo's observations that made him follow Copernicus's heliocentric idea?
1. There are craters in the moon
2. Jupiter has moons that orbit the planet, not Earth.
3. Venus goes through the same phases as the moon.
What are the tides called when:
1. the gravitational pull of the moon and sun are working together?
2. the moon and sun are out of sync?
1. Spring tides
2. Neap tides
Which is brighter: a star with an apparent magnitude of 1 or 5?
1.
What are the layers of the atmosphere?
1. Troposphere (where we live)
2. Stratosphere (has the ozone)
3. Mesosphere (middle child idk)
4. Thermosphere (Ionosphere, has all the ions)
What are two ways to create a magnetic field? Electric field?
Magnetic field: 1. Change an electric field. 2. Electric current.
Electric field: Change a magnetic field. 2. Static electric charges.
What are Newton's 3 laws?
1. An object not in motion, stays not moving.
2. The amount an object moves is directly proportional to the amount of pressure applied to it.
3. For every action, there is an equal opposite reaction.
How does the Earth's spin slowing affect the moon?
She is spinning faster and moving further from Earth.
What are the celestial latitude and longitudes called?
Right ascension and declanation
Where is the Earth releasing its radiation to?
The atmosphere-- greenhouse effect.
When an object is heated up, what happens to the waves it puts off?
The overall frequency raises.
What is it called when an object is moving towards you and the peaks of the wavelengths become smaller and higher and then get larger and lower as it moves away from you?
Doppler Effect
What categorizes the moon as a dead celestial object?
It's core is cold so the surface is unchanging. ie if an asteroid hits it, the crater is going to stay unlike Earth's hot core creating the rock cycle
What are two ways you can enhance images of stars reeeeeally far away?
1. Change the wavelength of the light with filters
2. Create a bigger telescope to gather more light (and up the resolution).
What keeps the sun from giving us constant cancer?
Earth's magnetic fields
What will an atom with an electron on the 2nd state do when the lowest state is empty?
Emit a photon with the same energy as the difference between the two states.
What are Kepler's 3 big laws?
1. Celestial Bodies move on elipses
2. Equal Area = Equal Time (orbital)
3. Orbital time is related to the semimajor axis