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
The transcription of three different genes that are found in the same chromosome.
The tiger, Panthera tigris, was historically found throughout much of Asia, but at low population de
The two bright stars are (left) Alpha Centauri and (right) Beta Centauri.
Pre–Main-Sequence Stars
The Crab Nebula and Pulsar
Many different types of labels may be found on packages containing hazardous materials. Clockwise ...