How can a planetary nebula be identified? Select 2 correct answers.

a. dark area
b. diffuse edges
c. spherical shape
d. central star remnant

9 answers

b. diffuse edges
c. spherical shape
How are nebulae and stars related? Select 3 correct answers.
a. stars explode to form nebulae
b. stars are pulled toward nebulae
c. stars form from nebulae
d. nebulae explode to form stars
e. nebulae are found inside stars
f. nebulae form from stars
c. stars form from nebulae
f. nebulae form from stars
select three correct answers
a. stars explode to form nebulae
c. stars form from nebulae
f. nebulae form from stars
what causes a supernova?
a. force of a nebula
b. energy of a nebula
c. energy of heat
d. force of gravity
d. force of gravity
what does it mean to categorize a nebula as diffuse?
a. its edges do not have clear boundaries
b. it reflects only non-visible radiation
c. its edges have clear boundaries
d. it reflects only visible radiation
a. its edges do not have clear boundaries