Resultado de búsqueda
Hace 1 día · Earth, third planet from the Sun and the fifth largest planet in the solar system in terms of size and mass. Its single most outstanding feature is that its near-surface environments are the only places in the universe known to harbour life. It is designated by the symbol ♁.
- Basic Planetary Data
Earth - Planet, Atmosphere, Geology: The mean distance of...
- The Atmosphere
Earth - Atmosphere, Climate, Ozone: Earth is surrounded by a...
- Accretion of the Early Earth
Earth - Accretion, Formation, Core: As the gas making up the...
- Planetary Differentiation
Earth - Differentiation, Formation, Structure: Once hot,...
- The Interior
Earth - Core, Mantle, Crust: More than 90 percent of Earth’s...
- Structure, Composition, Development
Earth - Structure, Composition, Development: The origin of...
- The Outer Shell
Earth - Core, Crust, Mantle: Earth’s outermost, rigid, rocky...
- Near Earth Asteroid Rendezvous
The NEAR spacecraft was launched by the U.S. National...
- Basic Planetary Data
Hace 3 días · Earth - Core, Crust, Mantle: Earth’s outermost, rigid, rocky layer is called the crust. It is composed of low-density, easily melted rocks; the continental crust is predominantly granitic rock (see granite), while composition of the oceanic crust corresponds mainly to that of basalt and gabbro.
Hace 5 días · Key points in Earth’s formation include the initial birth of our planet within the solar nebula, the differentiation into layers, and the dynamic interplay of geological processes that have shaped the Earth we know today.
Hace 4 días · Hadean Eon, informal division of the Precambrian occurring between about 4.6 billion and about 4.0 billion years ago. It was the time of Earth’s initial formation—the accretion of dust and gases, collisions with larger bodies, the stabilization of its core and crust, and the rise of its atmosphere and oceans.
Hace 5 horas · The first space rock, asteroid 2011 UL21, passed by Earth on June 27 at a distance of 4.1 million miles (6.6 million kilometers), or 17 times the distance between Earth and the moon. Researchers ...
Hace 19 horas · Graphite in metasedimentary rocks of the Eoarchean Saglek-Hebron Gneiss Complex (Canada) is depleted in 13C and has been interpreted as one of the oldest traces of life on Earth. The variation in ...
Hace 19 horas · Research is under way to confirm if the microfossil is the oldest known evidence of complex life on Earth. When a black rock glinting in the harsh light of Western Australia's outback caught Erica ...
