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
Examples of deep-sea corals found in the Sable Gully, 200 km off the coast of Nova Scotia.
Formed Elements of Blood
A Gas- and Dust-Rich Region of Orion
Some Shapes of Planetary Nebulae
Cranial capacity has increased approximately fourfold over the last 3.5 million years of hominin evo
Evolutionary Stages of Stars