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Latest Posts by mattginnow - Page 4
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Cave and Basin, Banff, Canada | by JD Hascup
More of our amazing world
Matthew Ginnow Matt Ginnow #mattginnow #matthewginnow
#yellowstone
Matthew Ginnow Matt Ginnow #mattginnow #matthewginnow
Eastern Screech Owl, Georgia Photograph by Graham McGeorge Masters of disguise. The eastern screech owl is seen here doing what they do best. You better have a sharp eye to spot these little birds of prey. Okefenokee Swamp, Georgia, U.S.A.
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Matt Ginnow, Matthew Ginnow, #mattginnow, #matthewginnow
Matt Ginnow, Matthew Ginnow, #mattginnow, #matthewginnow
Matthew Ginnow Matt Ginnow #mattginnow #matthewginnow
People relax beside a swimming pool at a country estate near Phoenix, Arizona, 1928. Photograph by Clifton R. Adams, National Geographic Creative
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A chorus line high kicks during a show at Cafe Le Can Can in Miami Beach, Florida, 1963. Photograph by Dean Conger, National Geographic Creative
Matthew Ginnow Matt Ginnow #mattginnow #matthewginnow
People peer through a natural window in the castellated cliffs above the river in White Cliffs, Montana, 1971. Photograph by Volkmar K. Wentzel, National Geographic Creative
Matthew Ginnow Matt Ginnow #mattginnow #matthewginnow
A woman leans on the entrance to one of Bordighera’s gardens in Italy, 1928.Photograph by Hans Hildenbrand, National Geographic Creative
Matthew Ginnow Matt Ginnow #mattginnow #matthewginnow
Here’s What You Need to Know About Near-Earth Objects
Our solar system is littered with asteroids and comets, and sometimes they get a little close to Earth. But no need to worry! This happens all the time. When an asteroid or comet could come close to our planet, it’s known as a near-Earth object – aka NEO.
But how close is “close”?
A near-Earth object is defined as an object that could pass by our Earth within 30 million miles. We begin to keep close watch on objects that could pass within 5 million miles of our planet.
To put that into perspective, our Moon is only 238,900 miles away.
However unlikely an impact is, we want to know about all near-Earth objects. Our Planetary Defense Coordination Office maintains watch for asteroids and comets coming close to Earth. Along with our partners, we discover, catalog and characterize these bodies.
But what if one of these objects posed a threat?
We want to be prepared. That is why we are working on several deflection techniques and technologies to help protect our planet.
So next time that you hear of an asteroid passing “close” to Earth, know that it’s just one of many that we are tracking.
Here are 10 more things you should know about Planetary Defense.
Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com
Matt Ginnow #mattginnow
Porpoises leap inside a man-made lagoon in Oahu, Hawaii, 1966. Photograph by Thomas Nebbia, National Geographic Creative
Matt Ginnow #mattginnow
Hillside houses overlook smoke-belching steel mills in Pittsburgh, Pennsylvania, 1949. Photograph by John E. Fletcher and Anthony B. Stewart, National Geographic Creative
Matt Ginnow #mattginnow
A woman leans on the entrance to one of Bordighera’s gardens in Italy, 1928.Photograph by Hans Hildenbrand, National Geographic Creative
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Matt Matthew Ginnow #mattginnow
Earth Day at Home with NASA
When you think about Earth Day, you might think about planting trees or picking up garbage. But right now, as a lot of us are staying inside to stay safe, we’ve got you covered for Earth Day at Home with ways to appreciate our beautiful home planet from your couch.
Want to help our researchers map coral in the ocean?
Our new NeMo-Net app lets you do that while playing a game!
What about virtually exploring our planet?
Worldview lets you choose any location on Earth and see it the way our satellites do – in natural color, lit by electric lights at night, or in infrared, highlighting fires around the globe.
On April 22 – Earth Day – we’ll have a host of activities you can participate in. Scientists will share their research from their own homes, including messages from astronauts living on the International Space Station! Hear stories from a trip to Earth’s most remote location: Antarctica, including what happens when the chocolate goes missing on a weeks-long excursion. We’ll even have a new episode of NASA Science Live sharing some of what we’re doing to make our work more sustainable.
We’ll be sharing Earth Day from our homes with #EarthDayAtHome on Twitter, Instagram, Facebook and with a Tumblr Answer Time right here! Follow along, and participate, as we share our love for our home planet with you.
Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com.
Matthew Ginnow, Matt Ginnow
Matthew Ginnow, Matt Ginnow
Amazing Earth: Satellite Images from 2020
In the vastness of the universe, the life-bringing beauty of our home planet shines bright. During this tumultuous year, our satellites captured some pockets of peace, while documenting data and striking visuals of unprecedented natural disasters. As 2020 comes to a close, we’re diving into some of the devastation, wonders, and anomalies this year had to offer.
NASA’s fleet of Earth-observing satellites and instruments on the International Space Station unravel the complexities of the blue marble from a cosmic vantage point. These robotic scientists orbit our globe constantly, monitoring and notating changes, providing crucial information to researchers here on the ground.
Take a glance at 2020 through the lens of NASA satellites:
A Delta Oasis in Southeastern Kazakhstan
Seen from space, the icy Ili River Delta contrasts sharply with the beige expansive deserts of southeastern Kazakhstan.
When the Operational Land Imager (OLI) on Landsat 8 acquired this natural-color image on March 7, 2020, the delta was just starting to shake off the chill of winter. While many of the delta’s lakes and ponds were still frozen, the ice on Lake Balkhash was breaking up, revealing swirls of sediment and the shallow, sandy bed of the western part of the lake.
The expansive delta and estuary is an oasis for life year round. Hundreds of plant and animal species call it home, including dozens that are threatened or endangered.
Fires and Smoke Engulf Southeastern Australia
A record-setting and deadly fire season marred the beginning of the year in Australia. Residents of the southeastern part of the country told news media about daytime seeming to turn to night, as thick smoke filled the skies and intense fires drove people from their homes.
This natural-color image of Southeastern Australia was acquired on January 4, 2020, by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite. The smoke has a tan color, while clouds are bright white. It is likely that some of the white patches above the smoke are pyrocumulonimbus clouds—clouds created by the convection and heat rising from a fire.
Nighttime Images Capture Change in China
A team of scientists from NASA’s Goddard Space Flight Center (GSFC) and Universities Space Research Association (USRA) detected signs of the shutdown of business and transportation around Hubei province in central China. As reported by the U.S. State Department, Chinese authorities suspended air, road, and rail travel in the area and placed restrictions on other activities in late January 2020 in response to the COVID-19 outbreak in the region.
A research team analyzed images of Earth at night to decipher patterns of energy use, transportation, migration, and other economic and social activities. Data for the images were acquired with the Visible Infrared Imaging Radiometer Suite (VIIRS) on the NOAA–NASA Suomi NPP satellite (launched in 2011) and processed by GSFC and USRA scientists. VIIRS has a low-light sensor—the day/night band—that measures light emissions and reflections. This capability has made it possible to distinguish the intensity, types, and sources of lights and to observe how they change.
The Parched Paraná River
Though a seemingly serene oasis from above, there is more to this scene than meets the eye. On July 3, 2020, the Operational Land Imager (OLI) on Landsat 8 captured this false-color image of the river near Rosario, a key port city in Argentina. The combination of shortwave infrared and visible light makes it easier to distinguish between land and water. A prolonged period of unusually warm weather and drought in southern Brazil, Paraguay, and northern Argentina dropped the Paraná River to its lowest water levels in decades. The parched river basin has hampered shipping and contributed to an increase in fire activity in the delta and floodplain.
The drought has affected the region since early 2020, and low water levels have grounded several ships, and many vessels have had to reduce their cargo in order to navigate the river. With Rosario serving as the distribution hub for much of Argentina’s soy and other farm exports, low water levels have caused hundreds of millions of dollars in losses for the grain sector, according to news reports.
Historic Fires Devastate the U.S. Pacific Coast
Climate and fire scientists have long anticipated that fires in the U.S. West would grow larger, more intense, and more dangerous. But even the most experienced among them have been at a loss for words in describing the scope and intensity of the fires burning in West Coast states during September 2020.
Lightning initially triggered many of the fires, but it was unusual and extreme meteorological conditions that turned some of them into the worst conflagrations in the region in decades.
Throughout the outbreak, sensors like the Visible Infrared Imaging Radiometer Suite (VIIRS) and the Ozone Mapping and Profiler Suite (OMPS) on the NOAA-NASA Suomi NPP satellite collected daily images showing expansive, thick plumes of aerosol particles blowing throughout the U.S. West on a scale that satellites and scientists rarely see.
This image shows North America on September 9th, 2020, as a frontal boundary moved into the Great Basin and produced very high downslope winds along the mountains of Washington, Oregon, and California. The winds whipped up the fires, while a pyrocumulus cloud from the Bear fire in California injected smoke high into the atmosphere. The sum of these events was an extremely thick blanket of smoke along the West Coast.
The Sandy Great Bahama Bank
Though the bright blues of island waters are appreciated by many from a sea-level view, their true beauty is revealed when photographed from space. The underwater masterpiece photographed above is composed of sand dunes off the coast of the Bahamas.
The Great Bahama Bank was dry land during past ice ages, but it slowly submerged as sea levels rose. Today, the bank is covered by water, though it can be as shallow as two meters (seven feet) deep in places. The wave-shaped ripples in the image are sand on the seafloor. The curves follow the slopes of the dunes, which were likely shaped by a fairly strong current near the sea bottom. Sand and seagrass are present in different quantities and depths, giving the image it’s striking range of blues and greens.
This image was captured on February 15th, 2020, by Landsat 8, whose predecessor, Landsat 7, was the first land-use satellite to take images over coastal waters and the open ocean. Today, many satellites and research programs map and monitor coral reef systems, and marine scientists have a consistent way to observe where the reefs are and how they are faring.
Painting Pennsylvania Hills
Along with the plentiful harvest of crops in North America, one of the gifts of Autumn is the gorgeous palette of colors created by the chemical transition and fall of leaves from deciduous trees.
The folded mountains of central Pennsylvania were past peak leaf-peeping season but still colorful when the Operational Land Imager (OLI) on the Landsat 8 satellite passed over on November 9, 2020. The natural-color image above shows the hilly region around State College, Pennsylvania overlaid on a digital elevation model to highlight the topography of the area.
The region of rolling hills and valleys is part of a geologic formation known as the Valley and Ridge Province that stretches from New York to Alabama. These prominent folds of rock were mostly raised up during several plate tectonic collisions and mountain-building episodes in the Ordovician Period and later in the creation of Pangea—when what is now North America was connected with Africa in a supercontinent. Those events created the long chain of the Appalachians, one of the oldest mountain ranges in the world.
A Dangerous Storm in the Night
Ominous and looming, a powerful storm hovered off the US coastline illuminated against the dark night hues.
The Visible Infrared Imaging Radiometer Suite (VIIRS) on NOAA-20 acquired this image of Hurricane Laura at 2:20 a.m. Central Daylight Time on August 26, 2020. Clouds are shown in infrared using brightness temperature data, which is useful for distinguishing cooler cloud structures from the warmer surface below. That data is overlaid on composite imagery of city lights from NASA’s Black Marble dataset.
Hurricane Laura was among the ten strongest hurricanes to ever make landfall in the United States. Forecasters had warned of a potentially devastating storm surge up to 20 feet along the coast, and the channel might have funneled that water far inland. It did not. The outcome was also a testament to strong forecasting and communication by the National Hurricane Center and local emergency management authorities in preparing the public for the hazards.
A Windbreak Grid in Hokkaido
From above, the Konsen Plateau in eastern Hokkaido offers a remarkable sight: a massive grid that spreads across the rural landscape like a checkerboard, visible even under a blanket of snow. Photographed by the Operational Land Imager (OLI) on Landsat 8, this man-made design is not only aesthetically pleasing, it’s also an agricultural insulator.
The strips are forested windbreaks—180-meter (590-foot) wide rows of coniferous trees that help shelter grasslands and animals from Hokkaido’s sometimes harsh weather. In addition to blocking winds and blowing snow during frigid, foggy winters, they help prevent winds from scattering soil and manure during the warmer months in this major dairy farming region of Japan.
Shadows from a Solar Eclipse
Formidable, rare, and awe-inspiring — the first and only total solar eclipse of 2020 occurred on December 14, with the path of totality stretching from the equatorial Pacific to the South Atlantic and passing through southern Argentina and Chile as shown in the lower half of the image above. The Advanced Baseline Imager (ABI) on Geostationary Operational Environmental Satellite 16 (GOES-16) captured these images of the Moon’s shadow crossing the face of Earth.
The “path of totality” (umbral path) for the eclipse was roughly 90 kilometers (60 miles) wide and passed across South America from Saavedra, Chile, to Salina del Eje, Argentina. While a total eclipse of the Sun occurs roughly every 18 months, seeing one from any particular location on Earth is rare. On average, a solar eclipse passes over the same parcel of land roughly every 375 years. The next total solar eclipse will occur on December 4, 2021 over Antarctica, and its next appearance over North America is projected for April 8, 2024.
For additional information and a look at more images like these visit NASA’s Earth Observatory.
Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com.
Matthew Ginnow Matt Ginnow
Matthew Ginnow Matt Ginnow
Matthew Ginnow, Matt Ginnow