Science is the poetry of Nature.

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Posts tagged "Earth"

IRIS - Sunrise II - Max Planck Institute for Solar System Research

South America’s second largest river, the Paraná River (and its tributaries) is seen here in this astronaut photo acquired on April 9, 2011, revealing an 18-mile-across (29 kilometers) expanse of the river downstream from Goya, Argentina. - NASA Earth Observatory [x]

Brazil From Space

Photographed by an Expedition 16 crewmember aboard the International Space Station, this image shows the Sao Simao Reservoir, Brazil.

Image Credit: NASA/ISS

The reservoir, which spans an area of 600000 square kilometers (232,000 square miles), is located where the Rio Paranaiba and Rio Verde meet up.

The image also highlights the area’s various agricultural fields.


Hidden Ocean Locked Up Deep in Earth’s Mantle

Deep within the Earth’s rocky mantle lies oceans’ worth of water locked up in a type of mineral called ringwoodite, new research shows.

Image: Earth’s surface oceans are quite apparent, even from satellite images of our blue marble, but now scientists have found oceans’ worth of water are hidden deep in Earth’s mantle, locked up in a mineral called ringwoodite. Credit: NASA/NOAA

The results of the study will help scientists understand Earth’s water cycle, and how plate tectonics moves water between the surface of the planet and interior reservoirs, researchers say.

The Earth’s mantle is the hot, rocky layer between the planet’s core and crust. Scientists have long suspected that the mantle’s so-called transition zone, which sits between the upper and lower mantle layers 255 to 410 miles (410 to 660 kilometers) below Earth’s surface, could contain water trapped in rare minerals. However, direct evidence for this water has been lacking, until now.

To see if the transition zone really is a deep reservoir for water, researchers conducted experiments on water-rich ringwoodite, analyzed seismic waves travelling through the mantle beneath the United States, and studied numerical models. They discovered that downward-flowing mantle material is melting as it crosses the boundary between the transition zone and the lower mantle layer.

"If we are seeing this melting, then there has to be this water in the transition zone," said Brandon Schmandt, a seismologist at the University of New Mexico and co-author of the new study published today (June 12) in the journal Science. “The transition zone can hold a lot of water, and could potentially have the same amount of H2O [water] as all the world’s oceans.” (Melting is a way of getting rid of water, which is unstable under conditions in Earth’s lower mantle, the researchers said.)

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The Mercury-Atlas 7 mission launched on May 24, 1962. Astronaut Scott Carpenter blasted off from Cape Canaveral and made three Earth orbits, becoming the sixth human being and the fourth American in space. All Earth images were snapped by Carpenter with a hand-held camera.



'Geologic Clock' Helped Determine Moon’s Age

An international team of planetary scientists determined that the Moon formed nearly 100 million years after the start of the solar system, according to a paper published today in Nature. This conclusion is based on measurements from the interior of the Earth combined with computer simulations of the protoplanetary disk from which the Earth and other terrestrial planets formed.

The team of researchers from France, Germany and the U.S. simulated the growth of the terrestrial planets (Mercury, Venus, Earth and Mars) from a disk of thousands of planetary building blocks orbiting the Sun. By analyzing the growth history of the Earth-like planets from 259 simulations, the scientists discovered a relationship between the time the Earth was impacted by a Mars-sized object to create the Moon and the amount of material added to the Earth after that impact.

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(via afro-dominicano)


Earthgazing: Bright ‘Evening Stars’ Seen from Mars are No Stars, But Earth and the Moon

This view of the twilight sky and Martian horizon taken by NASA’s Curiosity Mars rover includes Earth as the brightest point of light in the night sky. Earth is a little left of center in the image, and our moon is just below Earth.

Image credit: [NASA/JPL-Caltech/MSSS/TAMU](Image credit: NASA/JPL-Caltech/MSSS/TAMU )

Researchers used the left eye camera of Curiosity’s Mast Camera (Mastcam) to capture this scene about 80 minutes after sunset on the 529th Martian day, or sol, of the rover’s work on Mars (Jan. 31, 2014). The image has been processed to remove effects of cosmic rays.

A human observer with normal vision, if standing on Mars, could easily see Earth and the moon as two distinct, bright “evening stars.”

The distance between Earth and Mars when Curiosity took the photo was about 99 million miles (160 million kilometers).

NASA’s Jet Propulsion Laboratory, a division of the California Institute of Technology, Pasadena, manages the Mars Science Laboratory Project for NASA’s Science Mission Directorate, Washington. JPL designed and built the project’s Curiosity rover. Malin Space Science Systems, San Diego, built and operates the rover’s Mastcam.

That’s it, that’s us.

(via afro-dominicano)


Concept art of a cozy 3D-printed moon base, courtesy of the European Space Agency.

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This image shows the emission and transport of dust and other aerosols to the Southern Ocean on Dec. 30, 2006. Dust is represented with orange to red colors, sea salt with blue, organic and black carbon with green to yellow, and sulfates with brown to white.

Credit: William M. Putman and Arlindo M. da Silva (NASA/Goddard Space Flight Center)


Here is an interesting graphic representing the orbits of the over 1,000 known potentially hazardous asteroids that may one day affect life on Earth.

Learn more here :

Photo Credit: NASA

(via afro-dominicano)


Data from satellite images reveal that nearly three times more forest cover was lost than gained worldwide in the 21st century.
The maps were released by the journal Science.

(via afro-dominicano)


If you covered the earth in a mole of donuts, how thick would that layer be?

8 km!

From the TED-Ed Lesson How big is a mole? (Not the animal, the other one.) - Daniel Dulek

Animation by Augenblick Studios

(via afro-dominicano)


New GOCE geoid

ESA’s GOCE mission has delivered the most accurate model of the ‘geoid' ever produced, which will be used to further our understanding of how Earth works.

The colours in the image represent deviations in height (–100 m to +100 m) from an ideal geoid. The blue shades represent low values and the reds/yellows represent high values.

A precise model of Earth’s geoid is crucial for deriving accurate measurements of ocean circulation, sea-level change and terrestrial ice dynamics. The geoid is also used as a reference surface from which to map the topographical features on the planet. In addition, a better understanding of variations in the gravity field will lead to a deeper understanding of Earth’s interior, such as the physics and dynamics associated with volcanic activity and earthquakes.

(via afro-dominicano)


Giant Moon-Forming Impact On Early Earth May Have Spawned Magma Ocean

Billions of years ago, the Earth’s atmosphere an opaque and the planet’s surface was a vast magma ocean devoid of life.

This scenario, says Stanford University professor of geophysics Norman Sleep, was what the early Earth looked like just after a cataclysmic impact by a planet-size object that smashed into the infant Earth 4.5 billion years ago andformed the moon. The moon, once fully formed, which would have appeared much larger in the sky at the time, since it was closer to Earth

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Tokyo, Japan

An image that reminds of the opening scene of the manga film classic Akira, this futuristic night-time shot of the capital of Japan was taken in 2012 from the International Space Station.

(via afro-dominicano)