How to stars vary in size, composition, temperature, color, mass, and brightness?
Also, why does the parallax method of measuring star distances require observations of a star made six months apart?
Variation in size, brightness, and temperature are dependent on composition. Hydrogen vs. helium composition vs heavier elements control mass and color.
The parallax method requires the distances because it uses geometry to determine the distance in a parallelogram based on the known distance of the size of the earth's orbit at two points based farthest apart the angle of the star in the sky.
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment