Cassini flies by Saturn’s moon Helene on June 18, 2011, during a flyby that passed within 7000 km (4400 mi) of the moon. Each frame was taken between 3 and 4 minutes apart through the clear filter of Cassini’s narrow angle camera. At the beginning, Helene is backlit by the night side of Saturn. It’s rarely dark in the Saturanian night, because the planet’s rings reflect a lot of light back towards the planet.
Helene is a strange moon for a number of reasons. The most obvious of these are the gullies that cover the hemisphere facing Saturn. At only 43km across at its widest, Helene never had an atmosphere, so explaining how these gullies formed is a bit of a mystery. The leading theory is that these gullies are the result of ring material that piles up on its surface, collapses, and flows into low areas.
Helene is also a Trojan moon - meaning it doesn’t orbit Saturn independently. It shares its orbit with the much larger moon Dione, which is over 1100 km (680 mi) in diameter. Or, more appropriately, Dione shares its orbit with Helene. Helene resides at a Langrangian point, a relatively stable arrangement where Saturn’s and Dione’s gravitational pulls cancel out and prevent any encounters with the larger moon that could throw it into a more unstable orbit. Helene is only one of four known moons in the Solar System that reside at the Lagrangian point of a larger moon. (Oddly enough, all four are in the Saturn system.)
Cassini has made several flybys of Helene since arriving at Saturn in 2004, and will complete five more before its scheduled entry into Saturn’s atmosphere in 2017. However, none will come so close to Helene. The closest will be on March 14 of next year, when Cassini sails by at a relatively distant 58,000 km (36,000 mi) - more than 9 times further away than the flyby pictured here.
Image Credit: NASA/JPL-Caltech/Space Science Institute/Justin Cowart
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Black Teen With White Parents Mistaken For Burglar, Assaulted By Cops In His Own Home
‘Put your hands on the door, I was like, ‘For what? This is my house.’ Police pointed at photos of white people hanging on the wall and told him that he was lying.
A North Carolina teen was recently assaulted and pepper sprayed by police in his own home, after he was mistaken for a burglar. 18-year-old DeShawn Currie has been living with foster parents Ricky and Stacy Tyler in Wake County, North Carolina for about a year.
The Tylers love DeShawn as their own son and they have taken him into their home, in hopes to provide him the safe and loving environment that he needs to thrive in the most important years of his life.
Unfortunately, some of the Tyler’s neighbors were not familiar with the family dynamics of the home, and decided to call the police to report a burglary when they saw the young man entering his home after school one day. DeShawn did not climb through a window or struggle to get inside, but simply walked through the unlocked door of the home. The only thing that actually made his neighbors suspicious, was the color of his skin.
When police arrived on the scene they treated DeShawn like a criminal without asking any questions.
“They was like, ‘Put your hands on the door, I was like, ‘For what? This is my house.’ I was like, ‘Why are y’all in here?” DeShawn said in an interview.
When DeShawn asked the officers why they were in his home, they pointed at photos of white people hanging on the wall and told him that he was lying.
“I’m feeling comfortable, I had moved into my room, and I’m feeling like I’m loved. And then when they come in and they just profile me and say that I’m not who I am. And that I do not stay here because there was white kids on the wall, that really made me mad,” DeShawn later told reporters.
During the entire altercation, police were shouting profanity at the young man, and pointing multiple guns at his face. When DeShawn stood firm and insisted that he was in fact in his own home, police attacked him with pepper spray.
When Stacy Tyler came home from work she saw her son DeShawn in the driveway being treated by paramedics for the injuries that police had inflicted.
“My 5-year-old last night, she looked at me and said, ‘Mama I don’t understand why they hated our brother, and they had to come in and hurt him,” Stay Tyler told reporters.
“Everything that we’ve worked so hard for in the past years was stripped away yesterday in just a matter of moments,” father Ricky Tyler added.
The police department has defended their actions, saying that that DeShawn did not obey the officer’s orders to the letter, despite the fact that they were intruders in his home and had no right to be there barking orders at him.
Now this is something to bring attention to.
(via ibtk)Source: weloveinterracial