The stars found in nebulae like the Orion Nebula probably formed
A) within the last few million years.
B) about 10 million years ago.
C) hundreds of millions of years ago.
D) billions of years ago.
E) at the beginning of the universe.
Question 2
What two energy transport mechanisms, in order from outside the core to the surface, are found in the Sun?
A) convection, conduction
B) radiative diffusion, convection
C) conduction, radiative diffusion
D) radiative diffusion, conduction
E) conduction, convection
Photosynthetic thylakoid membranes and numerous gas vesicles found in a cell of the cyanobacterial g
Hertzsprung-Russell diagram for a set of stars that includes the Sun
Stars and the Interstellar Medium
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Earth 200 Million Years Ago