Answer:
The spectral types and sub-classes represent a temperature sequence, from hotter (O stars) to cooler (M stars), and from hotter (subclass 0) to cooler (subclass 9). The temperature defines the star's "color" and surface brightness. ... Stars are also classified by luminosity class.
Explanation:
Answer:
where are the pictures....
Explanation:
The ocean floor spreading showed that it is possible for landmasses to move.
dinos were probably around pangea, the movement of land would be my guess lol
It is knowing as stellar evolution
