The evidence that the universe is expanding at an accelerating rate comes from observations of
A) the redshifts in the light of from supernovas in other galaxies far away.
B) the rate of rotation of distant galaxies.
C) the center of our own galaxy, which is accelerating as it expands.
D) the redshifts of the stars in our own galaxy.
E) the redshift in the light from the cosmic background radiation.
Question 2
The expansion of the universe seems to be accelerating. The evidence for this is based on observations of
A) the manner in which the stars are distributed in our own galaxy.
B) the cosmic background radiation.
C) the slowing down in the pulsation rate of distant neutron stars.
D) gas clouds orbiting the centers of galaxies.
E) the redshift in the light from the explosions of distant supernovas.
The ozone hole in September, 2003. Even as scientists verified that the rate of ozone depletion was
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