According to the text, a star must be hotter than about 25,000 k to produce an h ii region. both the hottest white dwarfs and main-sequence o stars have temperatures hotter than 25,000 k. which type of star can ionize more hydrogen? why?

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

not copied too! hope this !

joke:

h o h o hope you have a merry christmas!

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it

365.25 earth days are in the year of a light year