A polymorph of calcium silicate (CaSiO3) having the perovskite structure is expected to be stable at the pressures and temperatures of Earth’s transition zone and lower mantle (420–2700 kilometers deep) […]
Earth is an ocean world with approximately 70 percent of its surface covered with water. In addition, a quantity of water equal to several Earth-size oceans is thought to be […]
Earth’s magnetic field provides a barrier shielding Earth from harmful cosmic rays as well as helping sustain our atmosphere by deflecting the solar wind. It is produced by a geodynamo […]
Earth is a volatile-rich planet. Volatile elements have played an important role in the geological evolution of Earth and were also responsible for creating habitable environments, where life could evolve […]
The differentiation of silicate mantles in the terrestrial planets can be traced by examining the Sm-Nd (samarium-neodymium) isotopic system in available mantle-derived samples. For example, the decay of 146Sm yields […]
How the Moon formed is a long-debated question. According to the giant impact theory, the Moon formed from a collision between the early Earth and a rocky body called “Theia.” […]
A study led by Timmons Erickson of Jacobs/NASA Johnson Space Center has identified Yarrabubba, a 70-kilometer-diameter crater in Western Australia, as the oldest impact structure on Earth. Rock samples from […]
Impact cratering from asteroids and comets is perhaps the most important process that shapes planet surfaces in the solar system, so it is important to know the rate of impact […]
While it has been known for a long time that Earth’s mantle contains primordial helium that dates back to the early days of our universe and is continuously degassed into […]
Dear colleagues, We would like to invite you to submit an abstract to the European Planetary Science Congress 2018, EPSC 2018 (16–21 September 2018, Berlin, Germany), on the Session LSE1/TP15: […]
We would like you to consider submitting an abstract and attending the following technical session: 11d “From Source to Sink – Geochemical Sulfur Cycles on Earth and Mars” during the […]
After the formation of the Moon, leftover planetesimals continued to bombard Earth for a prolonged period of time, adding as much as 0.5% of Earth mass (2×1024 kg of material). […]
We invite you to submit an abstract to our session on “Basalt weathering on Earth and Mars” at this year’s GSA Annual Meeting in Seattle, WA on October 22-25, 2017. […]
Three Experiments in Biological Origins: Early Earth, Venus and Mars January 12 – January 16, 2016 Kuramae Hall, Tokyo Institute of Technology, Tokyo, Japan Only Earth has generated and maintained a […]
ADVANCED DEADLINE FOR STUDENT TRAVEL TO MAY COMPARATIVE TECTONICS AND GEODYNAMICS OF VENUS, EARTH, AND EXOPLANETS CONFERENCE AT CAL TECH To meet NASA/JPL requirements for forecasting Conference Travel, the applications […]
Comparative Tectonics and Geodynamics of Venus, Earth, and Rocky Exoplanet Workshop First Announcement Available Now! The Comparative Tectonics and Geodynamics of Venus, Earth, and Rocky Exoplanets Workshop will be held May 4–6, […]
AGU Fall Meeting in San Francisco, CA, December 15-19, 2014. The potential existence of large plumes of water emitted from Europa’s surface has exciting implications for assessing the habitability of this icy […]
New images from NASA’s Curiosity Mars rover show Earth shining brighter than any star in the Martian night sky. The rover’s view of its original home planet even includes our […]
NASA is once again open for business in a big way. While we were out, several of our on-going missions achieved significant milestones, and although it will take a little […]
On Oct. 9, Juno flew by Earth using the home planet’s gravity to get a boost needed to reach Jupiter. The JunoCam caught this image of Earth, and other instruments […]