Chapter 14
Our Star
Our Star
This is created during fusion and flies directly out of the Sun. They are also invisible and really hard to detect
Neutrinos
What is the Spectral Sequence in order from hottest to coolest?
O B A F G K M
Which elements are the most prominent in the composition of stars?
Hydrogen and Helium
Are supernovas common?
Nope not at all
What is the object whose gravity is so powerful that not even light can escape it
A Black Hole
What is always trying to crush a star?
Gravity
If the hottest stars are around 50,000K, what would the coolest stars temperature be around?
3000K
True or false, can gravity create stars?
True
Where would the Brown Dwarfs be location on the H-R Diagram?
Bottom of the main sequence
Do Black Holes suck?
NO
What is the outermost layer of the solar atmosphere?
Corona
What two things do we need to measure to determine a star's luminosity?
Distance and Brightness
Observing what type of light from a cloud can reveal the newborn star embedded inside it?
Infared
If the low mass star dies and its core is left behind, what does the remains become?
White Dwarf
According to the white dwarf limit, a white dwarf cannot be more massive than...?
1.44Msun
What is 1 of the 3 causes of solar activity?
Sunspots
Solar Flares
Solar Prominences
How would the apparent brightness of a star change if it were 8 times farther away?
It would be 1/64 as bright
What type of events could start a star birth?
Supernova causes dense clumps to come together into a molecular cloud
A high mass star explodes and what does the core turn into?
Black Hole and Neutron Star
This supports the white dwarf against the crush of gravity
Electron Degeneracy Pressure
Which telescope is associated with the smallest nanometers?
White Dwarfs
Stars at the bottom of the main sequence cant sustain what?
Fusion
Planetary Nebulae is associated with what type of star?
Low Mass Stars
What is 2 things we need to measure the mass of a black hole
Velocity and Distance of orbiting gas