Solar system terrestrial planets as a research area focuses on the comparative study of Mercury, Venus, Earth, and Mars to understand the formation, differentiation, and evolution of rocky planets. It integrates planetary geology, geophysics, geochemistry, atmospheric science, and orbital dynamics to investigate crust–mantle–core structures, volcanic and tectonic processes, surface–atmosphere interactions, and volatile and climate histories. The field relies heavily on spacecraft missions, remote sensing, in situ measurements, laboratory analyses of analog materials, and numerical modeling to constrain accretion processes, interior dynamics, habitability conditions, and the broader context of terrestrial exoplanets.
Scientists at MIT and elsewhere have discovered extremely rare remnants of "proto Earth," which formed about 4.5 billion years ago, before a colossal collision irreversibly altered the primitive planet's composition and produced ...
Planetary Sciences
Oct 14, 2025
0
296
For more than twenty years, the Mars Express orbiter has studied the Red Planet and remains the European Space Agency's (ESA) only operational mission. In that time, it has provided the most complete map of the Martian atmosphere ...
Planetary Sciences
Oct 6, 2025
0
79
Venus is often called Earth's "sister planet" because of their similarities in size, mass, and composition. Both are rocky worlds that formed about the same time in the inner solar system; however, despite these similarities, ...
Planetary Sciences
Sep 29, 2025
0
120
Let's say you've picked the perfect spot for building a settlement on Mars. But this opens up some pretty nasty questions. Building…what? And building….with what? There are no trees to chop down to construct temporary structures. ...
Space Exploration
Sep 22, 2025
0
91
Before we get to Mars, we're going to have to practice. And develop radical leaps in technology, but also practice. A Mars mission will be utterly unlike anything attempted by humanity. We're talking about a group of settlers, ...
Space Exploration
Sep 19, 2025
1
95
Different parts of Mars have different advantages and disadvantages when it comes to their available resources, just like Earth. The polar caps are likely the most valuable in terms of their water content, which will be critical ...
Space Exploration
Sep 16, 2025
0
66
Planetary scientists believe they can now predict the green glow of an aurora in the night sky above Mars, and they have the images to prove it.
Planetary Sciences
Sep 10, 2025
0
38
Earth is so far the only known planet on which life exists—with liquid water and a stable atmosphere. However, the conditions were not conducive to life when it formed. The gas-dust cloud from which all the planets in the ...
Astrobiology
Aug 28, 2025
1
337
The idea of building settlements on Mars is a popular goal of billionaires, space agencies and interplanetary enthusiasts.
Space Exploration
Aug 26, 2025
0
159
You know, if you think about it, and trust me we're about to, the moon is kind of weird. Of all the terrestrial worlds of the solar system, we're the only one with a substantial natural satellite. Mercury and Venus have nothing. ...
Space Exploration
Aug 25, 2025
0
42
