White Dwarf
Neutron Star
Black hole
Special Relativity
General Relativity
100
This type of objects is as heavy as our Sun but as small we our Earth
What is white dwarf?
100
This type of object is as small as a city but as heavy as a few times the Sun
What is neutron star?
100
It is the boundary within which events in the black hole cannot influence events in the outside universe.
What is the event horizon of a blackhole?
100
A car is moving by you at a speed close to the speed of light. You notice that this aspect of the car increased from its value at rest
what is mass?
100
The reason Earth orbits the Sun
What is general relativity (mass of the Sun bends space-time)?
Earth is following the straightest path possible through spacetime, but this path happens to go around and around the Sun.
200
The more mass it has, the smaller this aspect of a white dwarf is
What is the size of a white dwarf?
200
Rotating neutron stars observed to have pulses of radiation at very regular intervals that typically range from milliseconds to seconds. They have very strong magnetic fields which funnel jets of particles out along the two magnetic poles.
What are pulsars?
200
This would happen to the orbit of planets in the Solar system if the Sun was suddenly replaced by a black hole with the same mass as the Sun
What is nothing?
200
A rocket is moving by you at a speed close to the speed of light. You notice that this aspect of the rocket decreased from its rest value
What is length in the direction of motion?
200
Suppose you and a friend have precise clocks. You are on the ground floor of a tall building and your friend is on the roof (ignoring the rotation of Earth). Because of this effect you will notice this effect, you will see your friend's clock ticking faster than yours, and she will see your clock ticking slower than hers.
What is gravitational time dilation?
300
A white dwarf is supported by this type of pressure
electron degenerate pressure
300
Neutron star is a ball of neutrons left over from this type of supernova and supported by neutron degeneracy pressure.
What is massive star supernova?
300
During a supernova, if a star is massive enough for its gravity to overcome neutron degeneracy of the core, the core will be compressed until it becomes this type of objects.
What is black hole?
300
The special theory does not apply to this situation. For that, you need the general theory of relativity.
What is substantial acceleration or gravity?
300
many long arcs in this galaxy cluster 
what is gravitational lensing?
400
This would happen if a white dwarf reaches the Chandrasekhar limit (1.4 solar mass)
What is white dwarf supernovae?
400
This would happen if two neutron stars merge
What is gravitational wave radiation and the formation of a black hole?
400
This would happen if two black holes merge.
What is gravitational wave radiation and the formation of a more massive black hole?
400
Under this condition, special relativity predicts effects that are so small that they cannot be noticed without extremely precise, high-tech measurement.
what is low speed?
400
Because of this effect, time runs slower near a black hole
What is gravitational time dilation?
500
This would happen if two white dwarf merge
What is white dwarf supernova?
500
The first observational evidence for neutron stars.
What are pulsars?
Beams of radiation from a rotating neutron star sweep through space like lighthouse beams, making them appear to pulse.
500
The evidence that there is a blackhole at the center of our milky way
What are the closest stars orbiting Galactic Center?
Closest stars, such as the gravitationally redshifted star S2, that gave astronomers really convincing evidence that the Galactic center contains a supermassive black hole. Based on the stars’ orbits, astronomers calculated that roughly 4 million times the mass of the sun had to be contained within a region much smaller than the size of our solar system. They realized that whatever was at the heart of Milkyway was too dense to be anything but a black hole.
500
Because of this effect, from your point of view, time runs slower in the reference frame of anyone moving relative to you.
What is time dilation?
500
Hydrogen atoms have a spectral line with a wavelength of 656 nm. Because of this effect, when we observe this particular line from hydrogen gas located near the event horizon of a black hole, we measure a wavelength larger than 656 nm.
What is gravitational redshift?