Which of the following planets has the least substantial atmosphere?
A) Mercury B) Mars C) Earth D) Neptune E) Venus
Question 2
What do we mean by inflation?
A) the rapid expansion of the universe, driven by white dwarf supernova, that we still observe today
B) the expansion of universe starting with the instant after the Big Bang
C) the sudden release of photons when particles and antiparticles annihilate each other
D) a sudden expansion of the universe driven by the energy released when the strong and electroweak forces froze out from the GUT force
E) the photons released when electrons and protons first combined, forming the Cosmic Microwave Background Radiation
The monthly changes of angle between the direction of illumination by the Sun and viewing from Earth
Major Impacts on Mercury and on Our Moon
Ancient Oceans and Lakes on Mars
Saturn as Seen from Earth
Water on Mars!
Idealized Tidal Bulges on Earth