31.2 vocab Flashcards
1
Q
Nebula
A
an interstellar cloud of dust
2
Q
Main sequence
A
a continuous and distinctive band of stars that appear
on plots of stellar color versus brightness
3
Q
Giant star
A
a star with substantially larger radius and luminosity
4
Q
Black hole
A
a region of spacetime where gravity is so strong
that nothing can escape from it
5
Q
White dwarf
A
a stellar core remnant composed mostly of electron
degenerate matter
6
Q
Photosphere
A
the lowest layer of the solar atmosphere
7
Q
Sunspots
A
a temporary phenomena on the sun’s photosphere
that appear as spots darker than the surrounding
areas
