The Local Group of galaxies spans about 30 million light-years in diameter.
Indicate whether the statement is true or false
Question 2
Energy balance in the Sun refers to a balance between ________.
A) the force of gravity pulling inward and the force due to pressure pushing outward
B) the amount of energy the Sun radiates into space and the amount of energy that reaches Earth
C) the rate at which fusion generates energy in the Sun's core and the rate at which the Sun's surface radiates energy into space
D) the mass that the Sun loses each second and the amount of mass converted into energy each second
Micrographs of nerve cells taken with different types of light microscopes.
The Long Valley Caldera Erupted the Bishop Ash 760,000 Years Ago
On March 25, 1911, as scores of young factory girls leaped to their deaths from the eighth, ninth, a
Comparison of group II self-splicing introns and the spliceosome
Major Causes of Death in U.S by Age Group
Interactions of Light and Matter