The Sun
Average, shines green, rice cake texture, center of the solar system, etc
What are some facts about our sun?
Interstellar clouds from previous stars gathers and gravity causes a protostar to form, then it becomes a pre-main sequence star, then a main sequence star finally
How do stars form?
apparent=relative to us
absolute=same distance with sizes
What is stellar magnitude?
very dense core of a collapsed supergiant
What is a neutron star?
stars >3 solar mass after collapse. gravity is so strong that nothing can escape, not even light.
how do black holes form?
prominences, solar flares, sunspots, and coronal holes
What are the features of the sun?
stars that become giants at the end of their lives, before eventually going supernova and becoming a neutron star or black hole
What are high-mass stars?
y axis: luminosity going up
x-axis: temperature going highest <- lowest
low mass, low luminosity -> high mass, high luminosity
What is an H-R diagram?
star with a very strong magnetic field and it is spinning ultrafast (lighthouse spins). also known as a neutron star
What is a pulsar?
Known as quasars when they absorb a star, the theoretical opposite is a white hole, LIGO can detect them
What are some facts about black holes?
Core, radiative zone, convection zone, photosphere, chromosphere, transitive zone, solar wind
What are the layers of the sun in order from the inside to the outside?
stars that eventually become white dwarfs at the end of their lifes
What are low-mass stars?
K1 III
What is Arcturus?
can be used to track the universe
Why are neutron stars important?
Time is relative, not perceived the same by everybody. If you move at a very high speed, time begins to slow down for objects you move relative to.
What is special relativity?
Happens in the core of the sun. Hydrogen becomes helium with a proton-proton chain reaction
What is Nuclear Fusion?
interstellar cloud -> protostar -> pre-main sequence star -> main sequence star -> red giant -> yellow giant -> second red giant ->planetary nebula -> neutron star
What is the life cycle of a low-mass star?
A2 1a
What is Deneb?
neutron superfluid interior, rigid iron crust
What are neutron stars made of?
the universe is flat, objects with extremely high mass distort and bend space. Time is slower when closer to massive objects
What is general relativity?
having created nuclear fusion we can now attempt to harness it for clean power
What is the significance of nuclear fusion to us here on Earth?
interstellar cloud -> protostar -> pre-main sequence -> main sequence -> pulsating yellow giant -> red supergiant -> supernova -> neutron star/black hole
What is the life cycle of a high-mass star?
K2 II and D B8
What is Albireo?
high-mass star (1.4 solar mass-3 solar mass) collapses after supernova, leaving only the core behind
How does a neutron star form?
gravity
what is a universal constant, when not time?