STARS
What is the next closest star to our Sun?
Proxima Centauri
hydrogen fuses into helium. what does helium then fuse into?
carbon
What does HR stand for?
Hertzprung-Russel
What is a final stage a star could reach at the end of its evolution? (multiple options)
White dwarf, neutron star, or a black hole
What do blackholes warp?
SPACETIME
What is more dense, a star or a nebula?
A star is more dense
What temperature does the core need to reach in order for fusion to begin, and for the protostar to become a star?
10 million K
What is a brown dwarf?
What is inside of a black hole?
NO ONE KNOWS
Dwarf Stars
In its earliest stage of forming, a star is considered to be a _________.
Nebula or interstellar cloud
Main Sequence stars
Name the 3 types of Binary systems
Detached, semi-detached, and contact
What part of a black hole is "the point of no return"?
The event horizon
POV: You're looking through a telescope and notice a reddish hue to a star you're observing. What can you assume about this star in compared to its blue-hued neighbors?
This star is burning at a cooler temperature
Once the core has reached 100,000,000 K, what type of fusion occurs?
Helium
What category of stars is the least common amoung stars plotted in an HR diagram?
White dwarfs
What are the two types of clusters? Which is older and which is younger?
Globular clusters: Older
Open clusters: Younger
What is the Schwarzchild radius of the Earth?
~ 1 cm
the size of a blueberry
What is the spectral class of a star with a surface temperature of 10,000 K?
A
Right after protostar appears on the HR Diagram, its luminosity ___________ and its temperature _____________.
Right after protostar appears on the HR Diagram, its luminosity decreases and its temperature increases.
What are the 7 general categories of stellar spectra regarding temperature?
O B A F G K M
Where do pulsars come from
Neutron stars
What is the Schwarzchild radius?
The radius at which the escape speed from the black hole equals the speed of light