Snowball Earth: When the Blue Planet Went White

The objective of the S2GM service is the provision of mosaic image products derived from the Sentinel-2A and -2B platforms. The data products shall serve as input to further thematic processing, generation of higher-level products, and analysis. The overarching requirement is the selection of the most representative spectrum for a given pixel, selected from the set of observations made during the temporal compositing period. This shall help to condense the overall information content; i. Input to the mosaicking process are surface reflectance values bottom-of-atmosphere or so-called Level 2A product. The purpose of this blog entry is to described observed issues within the output products of the S2GM service. The issues described herein have been detected during routine quality control, for which a set of pre-defined Regions of Interests ROI are checked on a regular basis in order 1 to detect artefacts after system updates, and 2 to identify general product issues.

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We have received your request. You will be notified when this product is in stock. We take advance reservations, and then just as soon as the crops are harvested, our staff of K. Fall Shipping Schedule. Shipping Note: Orders for gift certificates will be shipped immediately. Due to hot weather conditions, we are unable to ship any plant items from late June through August.

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WGV at White Gum Valley is a LandCorp ‘Innovation through Demonstration’ project designed to create a vibrant and highly sustainable community of more than 80 homes with a people-friendly, rather than car-dominated, layout and lots of green space. It’s 3km from the centre of Fremantle, which is a One Planet City. WGV includes single lots for self-build detached dwellings, maisonettes and apartment buildings.

As the buildings will be delivered by private developers and individuals, the development requires a highly innovative approach to ensure sustainability standards are met. For example, the the zero carbon energy principle is applied relatively straightforwardly for all housing types. All self-builders and developers are also encouraged to build sustainably with climate responsive design and significant investment in renewable energy and battery storage with assistance by ARENA the Australian Renewable Energy Agency.

Yolk Property Group is one of the developers that bought a lot to create a residential development. Learn more about One Planet Living in Australia. Equity and local economy 15 affordable dwellings built for younger people and local artists.

Planets Visible in the Night Sky in New York, New York, USA

A comet that defied the odds is in view in the evening sky. In fact, volcanoes on several worlds of the solar system may belch liquid water, The planets Jupiter and Saturn line up to the left of the Moon this evening.

Indeed, the Spice scientists were overwhelmingly white and male—a trend The war vet, the dating site, and the phone call from hell; Room to.

JavaScript seems to be disabled in your browser. For the best experience on our site, be sure to turn on Javascript in your browser. Contact a boutique about this piece. Wrist size Wrist size help opens dialog. This unique The “blued” mother-of-pearl dial features 18K white gold indexes filled with Super-LumiNova. The minute hand is also set with a single orange sapphire. The caseback includes a hand-engraved Seahorse set with diamonds. Anti-magnetic Anti-magnetic. The movement is unaffected by exposure to strong magnetic fields, even those greater than 1.

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Every year, meteor showers dazzle viewers, eclipses reveal the orbital balance of our planet with the sun and moon, and the other worlds of the solar system move across the sky against the backdrop of distant stars. Armed with a pair of binoculars, a simple telescope, or even just the naked eye, astronomy enthusiasts can witness some of the most spectacular phenomena in the night sky if they know when and where to look.

Even as light pollution continues to threaten the future of observational astronomy , national parks and other conservation institutions are creating dark sky parks to preserve the precious resource of a clear night sky. These ten astronomical events in could provide the perfect opportunity to travel to a dark sky reserve , such as central Idaho or the Mackenzie Basin of New Zealand, to take in the natural splendor of the Milky Way.

In late February, Mars, Jupiter and Saturn will line up in the night sky, providing an opportunity to view all three with a pair of binoculars or a telescope, or to simply enjoy the three planets with the naked eye. Between February 18 and 20, the moon will pass close to each of these planets, making it easier, no matter where you are, to find them in the night sky and perhaps snag some photos of the planets next to the moon.

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By continuing to use this website, you are giving consent to our use of cookies. For more information on how ESO uses data and how you can disable cookies, please view our privacy policy. The planet orbits the hot white dwarf, the remnant of a Sun-like star, at close range, causing its atmosphere to be stripped away and form a disc of gas around the star. This unique system hints at what our own Solar System might look like in the distant future. The team had inspected around white dwarfs observed by the Sloan Digital Sky Survey and found one to be unlike any other.

By analysing subtle variations in the light from the star, they found traces of chemical elements in amounts that scientists had never before observed at a white dwarf. These follow-up observations confirmed the presence of hydrogen, oxygen and sulphur associated with the white dwarf. The detected amounts of hydrogen, oxygen and sulphur are similar to those found in the deep atmospheric layers of icy, giant planets like Neptune and Uranus.

If such a planet were orbiting close to a hot white dwarf, the extreme ultraviolet radiation from the star would strip away its outer layers and some of this stripped gas would swirl into a disc, itself accreting onto the white dwarf. Combining observational data with theoretical models, the team of astronomers from the UK, Chile and Germany were able to paint a clearer image of this unique system.

The white dwarf is small and, at a blistering 28 degrees Celsius five times the Sun’s temperature , extremely hot. By contrast, the planet is icy and large—at least twice as large as the star. Since it orbits the hot white dwarf at close range, making its way around it in just 10 days, the high-energy photons from the star are gradually blowing away the planet’s atmosphere. Most of the gas escapes, but some is pulled into a disc swirling into the star at a rate of tonnes per second.

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It’s difficult to imagine now, but at certain points in Earth’s history, ice covered the entire planet. This frozen Earth, nicknamed snowball Earth , was a setting “so severe, that the Earth’s entire surface, from pole to pole, including the oceans , completely froze over,” said Melissa Hage, an environmental scientist and assistant professor at Oxford College of Emory University in Georgia. In , Louis Agassiz, a Swiss natural scientist, was among the first to acknowledge and provide evidence that Earth had gone through ice ages, according to the University of California Museum of Paleontology.

Joseph Kirschvink, an American geologist, later coined the term “snowball Earth,” in a textbook. Kirschvink’s work was based on evidence provided by Agassiz and others. Scientists believe that three to four severe ice ages , which froze nearly or all of the surface, occurred between million and million years ago, probably because Earth’s land masses were all located at or near the equator, which resulted in increased weathering.

If you know your browser is up to date, you should check to ensure that Venus is the second planet from the Sun, and is Earth’s closest The planet is a little smaller than Earth, and is similar to Earth inside. + View site.

Jupiter and Saturn are near their highest point in the southern sky, while Mars begins to ascend the eastern sky. Here, we present a schedule below which provides some of the best planet viewing times as well directing you as to where to look to see them. Mercury — is still visible before sunrise as August begins, but it quickly drops of sight and reaches superior conjunction with the sun on August 17th.

Venus — rises about the same time all August: around a. Mars — is rising earlier every week and becoming dazzling! At the beginning of August, it comes up soon after 11 p. Mars is gradually slowing in its nightly eastward progression in the southeast corner of Pisces the Fishes. Drawing ever nearer, Mars doubles in brightness during August, surpassing Sirius on August 21st and reaching magnitude Set your alarm clock so you can be out about a.

Mars is best during the first light of dawn when it is high in the south.

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A group of British scientists had a plan for a groundbreaking geoengineering test. Working from a disused military airstrip in Norfolk, UK, they would attach a 3,foot hose to a helium balloon, pump water into it, and spray the liquid into the atmosphere, where it would evaporate. The hardware test was part of a bigger plan to see if strategically releasing aerosols might help cool the planet by reflecting sunlight.

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The white dwarf is stripping away the atmosphere of the ice giant planet orbiting it. Stars live violent lives, and the planets around them don’t always survive their brutal phases. But for the first time, astronomers have found evidence of a planet that survived a star’s transition to death. In what researchers called “one of those chance discoveries,” they found an ice giant exoplanet — a planet outside of our solar system — orbiting an Earth-sized white dwarf.

When a sun-like star reaches the end of its life and burns through all of its fuel, it puffs up to form a red giant and blasts out about half of its mass. Nearby planets and asteroids become consumed by the blast. A blazing hot white dwarf is left behind, and any planets and asteroids that survived move farther out because the star no longer has the same gravitational pull on them. White dwarfs cool slowly as they age. In this case, the ice giant, a planet made of heavy gases similar to our solar system’s Neptune, is about four times the size of the star.

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We use cookies and other tracking technologies to improve your browsing experience on our site, show personalized content and targeted ads, analyze site traffic, and understand where our audiences come from. To learn more or opt-out, read our Cookie Policy. Sam Russell is the year-old mastermind behind Where White People Meet , a dating site whose title explains its purpose. Though anyone can join Russell’s site, its exclusionary title and apparent focus has irked many people on the internet.

But Russell doesn’t believe he’s being racist. I dated a black woman once,” Russell told the Washington Post. The “groups” Russell is referring to are the primary audiences for dating websites like Black People Meet or JDate — which allow users to connect with black and Jewish singles respectively. Russell’s views and comments have fueled internet outrage, to the point that what he’s doing feels a bit like performance art; he may even be saying stereotypically racist things to incite anger and draw more attention to his site.

The reason people are talking about the dating site is that there doesn’t seem to be a need for it. White people still represent the majority of Americans, and in the dating world, there are benefits to being white. OkCupid, one of the largest dating websites in the US, compiles data on its “matches” between its members. In , OkCupid found that white men get the most responses from potential mates. It also found that white women tend to reply to white men and exclude nonwhite men.

Yet they only reply well to guys who look like them,” OkCupid co-founder Christian Rudder wrote on the site’s blog.

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