The flatness problem arises because the curvature of space seems remarkably close to
A) zero curvature, favoring a spherical cosmos.
B) exactly one.
C) .5, suggesting we are split between open and closed universes.
D) 2.73 K, in spite of the eddies and turbulence that led to galaxy formation.
E) infinity, suggesting an open universe is the only possible cosmology.
Question 2
Which of the following did NOT contribute to the thinning of the Martian atmosphere during its early history?
A) the photodissociation of water molecules by ultraviolet light in the atmosphere
B) the stripping of the atmosphere by solar wind particles from the Sun
C) the consumption of carbon dioxide by photosynthetic bacteria
D) atmospheric gases being blasted into space by large impacts
Iberian lynx in close-up
The reflection nebula NGC 1999 is brilliantly illuminated by V380 Orionis (center), a variable star
Movement and Space
Problem Solving
Solution to Exponent Law Problem
Problem