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1 day ago · 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 harbor life. Learn more about development and composition of Earth in this article.
- Impacts, Planetesimals, Craters
Earth - Impacts, Planetesimals, Craters: During its...
- The Interior
Earth - Core, Mantle, Crust: More than 90 percent of Earth’s...
- Basic Planetary Data
Earth - Planet, Atmosphere, Geology: The mean distance of...
- The Atmosphere
Earth - Atmosphere, Climate, Ozone: Earth is surrounded by a...
- Planetary Differentiation
Earth - Differentiation, Formation, Structure: Once hot,...
- Near Earth Asteroid Rendezvous
The NEAR spacecraft was launched by the U.S. National...
- Impacts, Planetesimals, Craters
1 day ago · Earth reaches aphelion every July, and this year it occurs on Friday at 1:06 a.m. Eastern time. That Earth has an aphelion is a result of its orbit being elliptical, rather than circular.
2 days ago · Global warming, the phenomenon of increasing average air temperatures near Earth’s surface over the past one to two centuries, happens mostly in the troposphere, the lowest level of the atmosphere, which extends from Earth’s surface up to a height of 6–11 miles.
- Human activity affects global surface temperatures by changing Earth’s radiative balance—the “give and take” between what comes in during the day a...
- Continued global warming is expected to impact everything from energy use to water availability to crop productivity throughout the world. Poor cou...
- Polar bears live in the Arctic, where they use the region’s ice floes as they hunt seals and other marine mammals. Temperature increases related to...
5 hours ago · 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 ...
3 days ago · NASA's Earth Information Center allows visitors to see how our planet is changing in six key areas: sea level rise and coastal impacts, health and air quality, wildfires, greenhouse gases, sustainable energy, and agriculture.
3 days ago · Earth - Differentiation, Formation, Structure: Once hot, Earth’s interior could begin its chemical evolution. For example, outgassing of a fraction of volatile substances that had been trapped in small amounts within the accreting planet probably formed the earliest atmosphere.
4 days ago · Earth and environmental sciences cover all aspects of Earth and planetary sciences, and broadly encompasses solid Earth processes, surface and atmospheric dynamics, Earth system history,...
