The recent discovery of an Earth twin has boosted chances there is intelligent life on other planets. But while Pope Francis’s telescope scans the starlit skies, the Vatican is sceptical of ever meeting Mr.
Earth's magnetic field is 800 million years older than previously thought, new research suggests.
A new analysis of Western Australian zircon minerals has found the engine that generates the field started not long after the planet formed. Earth's so-called "geodynamo", involving the movement of molten iron in the Earth's outer core, began 4.22 billion years ago, say researchers today in the journal Science.
"This opens a window into a period that we know almost nothing about," says co-author, Professor Francis Nimmo of the University of California, Santa Cruz. "Before this study we knew that the dynamo had existed for around three and a half billion years. What this study has done is push back the age of the dynamo by another 800 million years."
Earth's magnetic field acts as a shield protecting the planet's atmosphere and water, which make life on Earth possible. Without the magnetic field Earth's atmosphere would have been eroded away by the solar wind, a stream of charged particles flowing from the Sun.
The magnetic field was particularly important in Earth's early history when solar winds were about 100 times stronger than they are now.
"The young Sun was very active, and so having a strong magnetic field early on allows you to hang on to your atmosphere," says Nimmo.
"Mars had a dynamo early on, but then that dynamo died," he says. "Part of the reason that Mars lost its atmosphere is not simply that it has less gravity, but also that it didn't have a magnetic field protecting the atmosphere from being blown away."
There’s a lot of talk in alternative healing circles about aligning the body’s energy with cosmic healing frequencies. A new study suggests that our bodies are attuned to frequencies in the cosmic environment.
Recently acquired images of Tethys, one of the ice moons of Saturn, have given scientists their best view yet of several “unusual, arc-shaped reddish streaks” that sweep across the satellite’s surface.
Images taken using clear, green, infrared and ultraviolet spectral filters were combined to create the enhanced-color views, which highlight subtle color differences across the icy moon’s surface at wavelengths not visible to human eyes.
A few of the red arcs can be seen faintly in observations made earlier in the Cassini mission, which has been in orbit at Saturn since 2004. But the color images for this observation, obtained in April 2015, are the first to show large northern areas of Tethys under the illumination and viewing conditions necessary to see the arcs clearly. As the Saturn system moved into its northern hemisphere summer over the past few years, northern latitudes have become increasingly well illuminated. As a result, the arcs have become clearly visible for the first time.
“The red arcs really popped out when we saw the new images,” said Cassini participating scientist Paul Schenk of the Lunar and Planetary Institute in Houston. “It’s surprising how extensive these features are.”
The origin of the features and their reddish color is a mystery to Cassini scientists. Possibilities being studied include ideas that the reddish material is exposed ice with chemical impurities, or the result of outgassing from inside Tethys. They could also be associated with features like fractures that are below the resolution of the available images.
Except for a few small craters on Saturn’s moon Dione, reddish-tinted features are rare on other moons of Saturn. Many reddish features do occur, however, on the geologically young surface of Jupiter’s moon Europa.
“The red arcs must be geologically young because they cut across older features like impact craters, but we don’t know their age in years.” said Paul Helfenstein, a Cassini imaging scientist at Cornell University, Ithaca, New York, who helped plan the observations. “If the stain is only a thin, colored veneer on the icy soil, exposure to the space environment at Tethys’ surface might erase them on relatively short time scales.”
Sharing your scoops to your social media accounts is a must to distribute your curated content. Not only will it drive traffic and leads through your content, but it will help show your expertise with your followers.
How to integrate my topics' content to my website?
Integrating your curated content to your website or blog will allow you to increase your website visitors’ engagement, boost SEO and acquire new visitors. By redirecting your social media traffic to your website, Scoop.it will also help you generate more qualified traffic and leads from your curation work.
Distributing your curated content through a newsletter is a great way to nurture and engage your email subscribers will developing your traffic and visibility.
Creating engaging newsletters with your curated content is really easy.