What space mission has collected data on Vesta, with its next destination to be Ceres?
a. New Horizons
b. HST
c. SOHO
d. Dawn
e. Deep Impact
d
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When light is totally polarized by reflection at an interface between two materials where the index of refraction for the incident medium is n1 and for the other is n2, the incident angle is given by 
= tan-1(n2/n1). This equation holds
A. only when n2 > n1. B. only when n1> n2. C. only when n2> n1+ 1. D. only when n2< n1+ 1. E. for all values of n1 and n2
If the average velocity is non-zero over a time interval, does this mean that the instantaneous velocity is never zero over that same time interval?
A. Yes B. No
Interferometry connects two or more separate telescopes only in the optical band of the electromagnetic spectrum
a. True b. False Indicate whether the statement is true or false
Would it be plausible for a planet that had an Earth-like atmosphere with plentiful oxygen, but no life of any kind, to exist in another solar system?
a. Plausible. Life requires far more than oxygen to exist. b. Plausible. The oxygen may have been transported there by cometary impacts. c. Implausible. Oxygen is highly reactive and its presence in an atmosphere suggests replenishment by a living organism of some sort. d. Implausible. Oxygen is essential to life.