NASA has published some interesting statistics about the world’s sandy beaches on Earth Observatory webpage. According to the images taken by Landsat satellites Notes 1 (Landsat 5 and Landsat 8 Notes 2, 3), about 31 percent of the world’s coastlines are sandy. Africa has the highest proportion of sandy beaches (66 percent) and Europe has the lowest (22 percent).
Continue reading NASA Has Published Statistics About the World’s Sandy Beaches
As a result of the global warming, the seas warm and ice melts. Naturally, Earth’s oceans have risen steadily – or at least, it was thought so. According to a new study based on 25 years of NASA and European satellite data, rather than increasing steadily, global sea level rise has been accelerating in recent decades. If this trend continues, by the year 2100, sea level rise will be around 65 cm (25.6 in), twice as big as previously thought. This is more than enough to cause significant problems for coastal cities.
Satellite altimetry Notes 1 has shown that since 1993, global mean sea level has been rising at a rate of ∼3 ± 0.4 millimeters per year. Researchers show that this rate is accelerating at 0.084 ± 0.025 mm/y2, which agrees well with climate model projections. This acceleration is driven mainly by increased melting in Greenland and Antarctica because of global warming. If sea level continues to change at this rate and acceleration, sea-level rise by 2100 (∼65 cm ± 12 cm, compared with 2005) will be more than double the amount if the rate was constant at 3 mm/y, researchers conclude.
Continue reading Global Sea Level Rise Accelerating, New Study Finds
Today (January 31), with popular terms, there was a “super blue blood moon”. It will be the first full total moon eclipse since September 27/28, 2015. What’s more, it was the first Blue Moon / Blood Moon visible from the United States since 1866.
UPDATE: NASA is live now, saying “We’re live online with views of the #SuperBlueBloodMoon from @UHawaiiNews.” (Click here to watch the live stream)
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On October 13, 1860, the early American photographer James Wallace Black (February 10, 1825 – January 5, 1896) climbed into a hot air balloon (named Queen of the Air) with his camera, and photographed Boston from a hot-air balloon at 1,200 feet (around 365 meters). He was not the first person to do it: two years ago, French photographer (and also caricaturist, journalist, novelist, and “balloonist”) Gaspard-Félix Tournachon (6 April 1820 – 20 March 1910), known by the pseudonym Nadar, who photographed Victor Hugo on his death-bed in 1885, took photographs of Paris from a hot air balloon too. But the Frenchman’s photos were lost many years ago. On that day, Black took 8 plates of glass negative; 10 1/16 x 7 15/16 in, but only one good print resulted, which the photographer entitled “Boston, as the Eagle and the Wild Goose See It”. Today, it remains the oldest surviving aerial photo.
Continue reading The Oldest Surviving Aerial Photo was Taken in 1860
On Friday, December 22, 2017, SpaceX’s Falcon 9 rocket delivered the fourth set of 10 Iridium NEXT satellites in a series of 75 total satellites to low-Earth orbit for Iridium, a global leader in mobile voice and data satellite communications. A Youtube user Jim Mudgett published an amazing footage of the Falcon 9 rocket launch. Enjoy!
Continue reading Watch: SpaceX Falcon 9 Rocket Launch (Dec. 22, 2017)
The commander of Expedition 53 (the 53rd expedition to the International Space Station), NASA astronaut Randy “Komrade” Bresnik has published a breathtakingly beautiful video on his twitter account. The video shows the International Space Station (ISS) night pass from Seattle down to Baja. What’s more, you can even see a meteor in the video, at 30th seconds!
Continue reading Watch: ISS night pass from Seattle down to Baja, meteor at 30th seconds
On Monday, August 21, an estimated 2 million to 7.4 million Americans traveled to see the first total solar eclipse in 99 years to go coast to coast in the United States, which went from Lincoln Beach, Oregon, to Charleston, South Carolina. But, some of them were unlucky, as the weather was overcast in some places. But, luckily for them (and for us), NASA captured some amazing and beautiful images of the eclipse and published them on their website.
Continue reading Total Solar Eclipse 2017 Images From Space
There will be a total solar eclipse on Monday, Aug. 21, 2017, and the United States will be the best country to watch. It will be also the first total solar eclipse to go coast to coast in the U.S. in 99 years. From Oregon to South Carolina, 70-mile Moon-shadow will race across the U.S. and it will completely block out the Sun for a few minutes. It’s still more than seven months away, but hotels already are selling out as people prepare for the rare and amazing event.
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On January 5, 2017, NASA has published the map of the event’s path announcing “…thanks to elevation data of the moon from NASA’s Lunar Reconnaissance Orbiter, or LRO, coupled with detailed NASA topography data of Earth, we have the most accurate maps of the path of totality for any eclipse to date.”
The Earth is always changing. “The only thing that is constant is change“, as Heraclitus (c. 535 – c. 475 BC) the pre-Socratic Greek philosopher once said. Unfortunately, things do not always happen the way we would have wanted. Here are 10 recently lost natural wonders that have been disappeared in recent centuries or even decades.
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There are a lot of natural and human-made wonders in the world. But everything has an end, and sooner or later, they’ll be gone. Unfortunately, some of them will be vanished sooner, even in a few decades. Here are eight of them, just in case you may want to see before they are gone.
Continue reading 8 Famous Places to See Before They Have Vanished