Similarities Between Mars and Earth Both Earth and Mars are believed to have condensed out of a massive cloud of hot gases around the sun about 4.6 billion years ago, according to the European Space Agency. Since that time, both planets slowly cooled and formed into the spherical shapes you ...
The sun, like all stars, exists in a delicate balance between the outward pressure of its core and the inward pressure of gravity. When the core is depleted of hydrogen, it can no longer stand up to the force of gravity, causing the star to collapse. This is how supernovae are generat...
3 and 5:2 resonances. The different color distributions of objects in mean motion resonance with Neptune are likely a result from the disruption of the primordial Kuiper Belt from the scattering and migration of the giant planets. The few low inclination objects known in the outer 2:1 and 5...
Dawn made history last year as the first mission to reach a dwarf planet, and the first to orbit two distinct extraterrestrial targets—both of them in the main asteroid belt between Mars and Jupiter. The mission conducted extensive observations of Vesta during its 14-month orbit there in 2011...