- 3 of Earth's Strangest Places
- NASA submarine to Study Planet Saturn Moon Titan’s Sea
- UV light reveals hidden colors in ancient shells
- VLA photos 18 years apart show dramatic difference in young stellar system
- Citizen Scientists Find Green Blobs in Hubble Galaxy Shots
- Shortest Total Lunar Eclipse of the Century Visible Early Saturday
- The Mystery of the Iron Pillar of Delhi
- Were Ancient Indians Ahead of Today's Western Scientists?
- 10 CREEPY MYSTERIES YOU HAVEN'T HEARD OF
- Earth's 10 Most Mysterious Figures Seen From the Sky
- Are Aliens Manipulation Our Society? Coast To Coast radio with George Noory
- Journey to the Center of the Earth
- How Dense is the Asteroid Belt?
Posted: 03 Apr 2015 05:24 PM PDT
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Posted: 03 Apr 2015 05:05 PM PDT
An animated and dramatic 3D video released by NASA has revealed the international space agency plans of exploring the depths of largest sea on the Titan, Kraken Mare.
NASA is planning to launch a submarine in the Kraken Mare Sea with an aim of studying the depth.
Titan is one of the 62 moons of the planet Saturn. Titan has its own and interesting atmosphere compared to other 61.
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A spacecraft named Cassini has been trying to study the Titan’s atmosphere since 2004. Most of the area of the moon Titan is covered by large bodies of methane and ethane in liquid form.
The submarine will definitely help more compared to Cassini spacecraft to measure and map the shorelines or sea.
While releasing the video the scientists from NASA has stated that the submarine will definitely help in exploring the history of the moon’s climatic conditions and could provide major breakthroughs among the discoveries made till date.
Posted: 03 Apr 2015 04:53 PM PDT
Excerpt from perfscience.com
Using ultra-violet (UV) light, scientists have revealed astonishing colors of about 30 ancient seashells. According to PLOS, the seashells, which are estimated to be between 6.6 and 4.8 million years old, were looking white in regular white light. The true colors of the shells appeared in UV light.
According to the researchers, “The biology of modern Conidae (cone snails)-which includes the hyperdiverse genus Conus-has been intensively studied, but the fossil record of the clade remains poorly understood, particularly within an evolutionary framework”.
In the presence of UV light, the organic matter remaining in the shells fluoresces. With this, the shells appeared similar to what they looked when living creatures used to live in them. It is yet unclear which particular compounds in the shells are releasing the light when exposed to UV rays. With the help of the technique, the researchers were able to document the coloration patterns of 28 different cone shell species found in the Dominican Republic. Out of these 28 shells, 13 were found to be the species, which were not known earlier. And this could help know about the relationship between modern species.
San Jose State University geologist Jonathan Hendricks exposed over 350 fossil specimens to ultraviolet light.
The coloration patterns of the ancient species were compared with existing animals and doing this, researchers found many displayed similarities. According to this finding, some modern species emerge from lineages. These lineages began in the Caribbean millions of years ago.
The newly distinguished species, Conus carlottae, was also among the newly distinguished species and it has a polka-dotted shell, which is not found in modern cone snails today. Researchers are now using UV light to emit color from porcelain white seashell fossils.
Posted: 03 Apr 2015 04:00 PM PDT
Excerpt from bulletinstandard.com
A pair of pictures of a young star, produced 18 years apart, has revealed a dramatic distinction that is giving astronomers with a exclusive, "real-time" appear at how enormous stars create in the earliest stages of their formation.
The astronomers utilized the National Science Foundation's Karl G. Jansky Extremely Significant Array (VLA) to study a huge young star known as W75N(B)-VLA two, some 4200 light-years from Earth. They compared an image made in 2014 with an earlier VLA image from 1996.
"The comparison is exceptional," stated Carlos Carrasco-Gonzalez of the Center of Radioastronomy and Astrophysics of the National Autonomous University of Mexico, leader of the research team. The 1996 image shows a compact region of a hot, ionized wind ejected from the young star. The 2014 image shows that ejected wind deformed into an distinctly elongated outflow.
"We're seeing this dramatic adjust in real time, so this object is offering us an exciting chance to watch over the subsequent handful of years as a quite young star goes via the early stages of its formation," Carrasco-Gonzalez said.
The scientists believe the young star is forming in a dense, gaseous atmosphere, and is surrounded by a doughnut-shaped, dusty torus. The star has episodes in which it ejects a hot, ionized wind for various years. At first, that wind can expand in all directions, and so forms a spherical shell around the star. Later, the wind hits the dusty torus, which slows it. Wind expanding outward along the poles of the torus, where there is significantly less resistance, moves a lot more speedily, resulting in an elongated shape for the outflow.
"In the span of only 18 years, we've noticed exactly what we predicted," Carrasco-Gonzalez said.
There are theoretical models developed to clarify why nearly-spherical expansion of such outflows had been observed with young stars significantly a lot more massive than the Sun, when narrower, beam-like outflows had been anticipated based on observations of significantly less-huge, Sun-like stars at comparable stages of improvement. W75N(B)-VLA two is estimated to be about 8 occasions more massive than the Sun. The far more-uniform outflows are seen in huge young stars in the initial few thousand years of their lives, the stage at which W75N(B)-VLA 2 is thought to be.
"Our understanding of how huge young stars create is much less comprehensive than our understanding of how Sun-like stars create," Carrasco-Gonzalez stated. "It is going to be truly good to be able to watch one particular as it alterations. We anticipate to find out a lot from this object," he added.
Posted: 03 Apr 2015 03:48 PM PDT
Excerpt from wired.com
In 2007, A Dutch schoolteacher named Hanny var Arkel discovered a weird green glob of gas in space. Sifting through pictures of galaxies online, as part of the citizen science project Galaxy Zoo, she saw a cloud, seemingly glowing, sitting next to a galaxy. Intrigued, astronomers set out to find more of these objects, dubbed Hanny’s Voorwerp (“Hanny’s object” in Dutch). Now, again with the help of citizen scientists, they’ve found 19 more of them, using the Hubble space telescope to snap the eight haunting pictures in the gallery above.
Since var Arkel found the first of these objects, hundreds more volunteers have swarmed to help identify parts of the universe in the Galaxy Zoo gallery. To find this new set, a couple hundred volunteers went through nearly 16,000 pictures online (seven people went through all of them), clicking yes/no/maybe as to whether they saw a weird green blob. Astronomers followed up on the galaxies they identified using ground-based telescopes, and confirmed 19 new galaxies surrounded by green gas.
What causes these wispy tendrils of gas to glow? Lurking at the center of each of these galaxies is a supermassive black hole, millions to billions times as massive as the sun, with gravity so strong that even light can’t escape them. As nearby gas and dust swirls into the black hole, like water circling a drain, that material heats up, producing lots of radiation—including powerful ultraviolet. Beaming out from the galaxy, that ultraviolet radiation strikes nearby clouds of gas, left over from past collisions between galaxies. And it makes the clouds glow an eerie green. “A lot of these bizarre forms we’re seeing in the images arise because these galaxies either interacted with a companion or show evidence they merged with a smaller galaxy,” says William Keel, an astronomer at the University of Alabama, Tuscaloosa.
The eight in this gallery, captured with Hubble, are especially weird. That’s because the quasar, the black-hole engine that’s supposed to be churning out the ultraviolet radiation, is dim—too dim, in fact, to be illuminating the green gas. Apparently, the once-bright quasar has faded. But because that UV light takes hundreds of thousands of years to travel, it can continue to illuminate the gas long after its light source has died away.
That glowing gas can tell astronomers a lot about the quasar that brought it to light. “What I’m so excited about is the fact that we can use them to do archaeology,” says Gabriela Canalizo, an astronomer at the University of California, Riverside, who wasn’t part of the new research. Because the streaks of gas are so vast, stretching up to tens of thousands of light years, the way they glow reveals the history of the radiation coming from the quasar. As the quasar fades, so will the gas’s glow, with the regions of gas closer to the quasar dimming first. By analyzing how the glow dwindles with distance from the quasar, astronomers can determine how fast the quasar is fading. “This was something we’ve never been able to do,” Canalizo says.
Measuring how fast the quasar fades allows astronomers to figure out exactly what’s causing it to turn off in the first place. “What makes them dim is running out of material to eat,” Canalizo says. That could happen if the quasar is generating enough radiation to blow away all the gas and dust surrounding the black hole—the same gas and dust that feeds it. Without a steady diet, the quasar is powerless to produce radiation. Only if more gas happens to make its way toward the black hole can the quasar turn on again. The glowing gas can provide details of this process, and if other mechanisms are at play.
With more powerful telescopes, astronomers will likely find many more. Hanny’s Verwoort, it turns out, may not be that weird after all.
Posted: 03 Apr 2015 03:23 PM PDT
Excerpt from space.com
By Calia Cofield
Don't forget to look skyward in the early hours of Saturday morning (April 4), to catch a glimpse of the shortest total lunar eclipse of the century.
The moon will be completely swallowed by Earth's shadow for just 4 minutes and 43 seconds on Saturday morning, according to NASA officials. During that time, the moon may change from its normal grayish hue to a deep, blood red. The total eclipse begins at 6:16 a.m. EDT (1016 GMT). You can watch a live webcast of the eclipse on the Slooh Observatory website, Slooh.com, or here at Space.com courtesy of Slooh, starting at 6 a.m. EDT (1000 GMT).
That change can make for a dramatic display, especially for humans in the distant past, NASA officials said.
"For early humans, [a lunar eclipse] was a time when they were concerned that life might end, because the moon became blood red and the light that the moon provided at night might have been taken away permanently," Mitzi Adams, an astronomer at NASA's Marshall Space Flight Center in Huntsville, Alabama, said during a news conference today (April 3). "But fortunately, [the light] always returned."
The April 4 eclipse is the third in a series of four total lunar eclipses — known as a lunar tetrad — visible in the United States. Each of the eclipses is separated by about 6 months. The final installment of this four-eclipse series will occur on Sept. 28. Saturday's lunar eclipse follows closely behind the total solar eclipse that took place on March 20.
Earth's shadow has an outer ring, called the penumbra, and an inner core, called the umbra. Where the moon passes into the penumbra, it appears dark, as if a bite had been taken out of it. When the moon passes though the umbra, it turns a deep, red color.
A total lunar eclipse occurs when the moon is totally submerged in the umbra. On Saturday, the moon will begin to enter the umbra at about 6:16 a.m. EDT (1016 GMT) but will not be completely covered by the shadow until about 7:57 EDT (1157 GMT), after the moon has set in most locations east of the Mississippi River.
While the total eclipse will last less than five minutes, the moon will be partially submerged in the umbra for about one hour and 40 minutes. The dark shadow of the penumbra will first be visible on the moon's surface starting at about 5:35 a.m. EDT (0935 GMT), according to Sky and Telescope magazine.
Viewers west of the Mississippi River will be able to see the total lunar eclipse, starting at about 4:57 a.m. PDT (1157 GMT). Skywatchers in Hawaii and western will be able to watch the entire eclipse, from the moon's entrance to its exit from the penumbra.
This weekend's eclipse is extremely short because the moon is only passing through the outskirts of the umbra. (The shortest total lunar eclipse in recorded history, according to Adams, was in 1529 and lasted only 1 minute and 41 seconds).
The eclipse will not be visible in Europe or most of Africa. The partial eclipse will be visible in all except the easternmost parts of South America. The best viewing locations for the total eclipse will be in the Pacific region, including eastern Australia, and other parts of Oceania.
Posted: 03 Apr 2015 03:02 PM PDT
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Posted: 03 Apr 2015 02:42 PM PDT
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Posted: 03 Apr 2015 02:26 PM PDT
Posted: 03 Apr 2015 01:55 PM PDT
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Posted: 03 Apr 2015 01:52 PM PDT
Posted: 03 Apr 2015 01:39 PM PDT
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Posted: 03 Apr 2015 01:30 PM PDT
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