What problem is adaptive optics designed to correct?
A) the opacity of the Earth's atmosphere
B) defects in the optical figuring, such as with the adaptive optics on HST
C) slight tracking errors in trying to compensate for our unsteady rotation
D) the effects of atmospheric turbulence
E) the absorption of ultraviolet by the ozone layer
Question 2
The size and shape of a planet's orbit can be determined by
A) the Doppler technique.
B) transit observations.
C) spectral measurements.
D) knowing the planet's mass by any technique and applying Newton's version of Kepler's third law.
E) gravitational microlensing.
Possible Earth 5 billion years from now
The Atmosphere of Mars
Layers are deposited parallel to Earth’s surface. Younger layers are deposited on top of older layer
Earth’s Oldest Preserved Rocks – 3.8 Billion Years Old, Greenland
Composition of the Atmosphere
Inflammation (innate and adaptive immunity)