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 composition of DNA sequences that are found in the nuclear genome of humans
Permafrost is found in much of Northern Canada
Stars vary widely in size.
The two bright stars are (left) Alpha Centauri and (right) Beta Centauri.
Looking toward the sky around Orion from Alpha Centauri with Sirius near Betelgeuse and the Sun betw
Types of kidney stones found in an adult.