Solar System
Light
Stars
Black Holes
Galaxies & Cosmology
100
This object contains 99% of the mass of the solar system
What is the Sun?
100
This effect causes light from an approaching object to appear blue and light from a receding object to appear red.
What is the Doppler Effect?
100
Once a star runs out of fuel, it will enter this phase of the HR diagram.
What is a red giant?
100
The apparent surface of a black hole
What is the Event Horizon?
100
The Milky Way is thought to be this kind of galaxy
What is a spiral galaxy?
200
These two planets have axial rotations that are not in the same direction as their orbital revolutions
What are Venus and Uranus?
200
An object that does not reflect light and only emits light.
What is a blackbody?
200
This is what needs to be overcome for nuclear fusion to happen.
What is the Coulomb Barrier?
200
The full name for AGN.
What is an Active Galactic Nucleus.
200
This is what 95% of the universe is made up of.
What is dark matter & dark energy?
300
Galileo discovered these moons of Jupiter.
What is Io, Callisto, Europa, and Ganymede?
300
This is the process where energy absorbed by an electron causes it to jump to a high energy level.
What is excitation?
300
The order of star types from hottest to coolest.
What is OBAFGKM?
300
This is the mechanism that kills black holes over the course of trillions of years.
What is Hawking Radiation?
300
This is the name that the combined name for the post-collision galaxy that results from the Milky Way and Andromeda
What is Milkdromeda?
400
Jupiter is sometimes considered a "failed star". If Jupiter was any bigger, this is the type of object it could've been.
What is a brown dwarf?
400
A prominent yellow line exists in this element's spectrum
What is helium?
400
The last element a massive star fuses before it undergoes gravitational collapse.
What is Iron (Fe)?
400
These are 2 objects that are infinitely small while being (maybe) infinitely dense. They are the only two known objects subject to Quantum Gravity
What is a black hole & the beginning of the Big Bang?
400
This standard candle is responsible for many of the greatest cosmological discoveries including the acceleration of the expansion of universe and that distant nebulae are actually other galaxies
What are type 1a supernovae?
500
This is the number of Uranus' known rings.
What is 13?
500
The speed of light is hidden within these two constants in this equation.
What are μ0 and ε0?
500
This phenomenon enables nuclear fusion in stars without the required temperature.
What is quantum tunneling?
500
A black hole is a hole in this many dimensions
What is four?
500
This is what the third term in the equation represents.
What is dark matter/dark energy?