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
Rover exposes silica-rich dust on Mars
teach their children to care for the earth in hopes of passing on a better world to future generatio
Blue light is scattered more than other wavelengths by the gases in the atmosphere, giving the Earth
The Interiors of Earth and Mercury
Water on Mars!
Short-wavelength flux is reflected by Earth