Are Fast Radio Bursts Evidence of Unknown Life?

March 27, 2017 :: Posted by - admin :: Category - Filmbutiken

 

The idea may be a little out of this world.

Called fast radio bursts, or FRBs, they have been identified as millisecond-long bursts of radio emission. Scientists believe these emissions were made in a group of stars billions of light years away from Earth.

A new theory says the radio bursts may be evidence of highly developed alien life. A paper describing the theory was published in The Astrophysical Journal Letters.

The bursts cannot be seen with the human eye, but were observed by very large radio telescopes.

Many scientists believe that these powerful flashes may be related to the collapse of a massive star. But scientist Avi Loeb says researchers have yet to confirm any natural cause of the emissions.

Loeb is chair of Harvard University’s Astronomy Department and works at the Harvard-Smithsonian Center for Astrophysics.

He believes the bursts might be coming from powerful equipment, like a transmitter used on Earth to broadcast radio or television signals. He thinks the device could be as big as a planet and have enough power to send large spaceships great distances.

While noting this is just “speculation,” Loeb told VOA what he suspects might be producing the fast radio bursts. He says, imagine a spacecraft moving like a sailboat, powered by light from the huge planet-sized transmitter.

“If you have a sailboat, the wind is pushing the sail, and the sail carries the boat along with it. You can imagine doing exactly the same thing with light. If you bounce light off a sail, you could push a spacecraft. And in principal because the spacecraft doesn’t carry its own fuel, you can push it all the way to the speed of light. At very high speeds.”

Loeb says it could be created by alien life forms belonging to a highly developed civilization.

He thinks the powerful bursts could be a sign of “leakage” — when light hitting the sail moves just past the edge of the sail. It shows up on Earth as a very bright, fast-moving radio wave.

“And the idea is that the beam of light that is being used to push the sail is leaking. We see leakage of that radiation and if the beam is powerful enough we could see it from a great distance and because the beam is sweeping across the sky, we would see it as a flash of light, as a burst of radio waves, the way these fast radio bursts appear.”

If there are aliens — life outside our planet — are they a threat?

Loeb does not think so. If they do exist, they are “great distances” from us, he notes, “so there is no danger for us directly.”

The bursts were first observed in 2007. Since then, a total of 18 have been identified using very large radio telescopes.

Some of the researchers have been at the National Radio Astronomy Observatory (NRAO) in the American state of New Mexico. They identified where one burst came from — a dwarf galaxy more than three billion light-years from Earth.

Sarah Burke-Spolaor teaches physics and astronomy at West Virginia University. She reported on the discovery earlier this year in two journals: Nature and Astrophysical Journal Letters.

Burke-Spolaor says the fast radio burst was first discovered in November of 2012 at the Arecibo Observatory in Puerto Rico. The NRAO radio telescope later helped to identify where the FRB came from. What makes this emission different is that it is the only one to keep sending bursts — about 200 times, so far.

Burke-Spolaor says there are “many ideas about what FRBS are.” She says “the leading theory … is that these are related to neutron stars in other galaxies.” They could also come from black holes – areas with a gravitational field so intense that no matter or radiation can escape.

She describes Avi Loeb as an “out of the box thinker.” She says his theories have an important job: they “make us (scientists) reconsider our assumptions and what we know and don’t know.”

She adds, “it doesn’t mean the theory is anywhere near right, but we don’t have enough evidence to rule it out.”

And where did Loeb get the idea that the fast radio bursts come from light pushing a spaceship?

Loeb leads a team developing technology to send spacecraft to a planet called Proxima b. The project is called Breakthrough Starshot. He and the team are developing thousands of small spacecraft with sails. They want to use laser beams to push those sails forward.

That got him thinking.

“The fact that we are starting to think about propelling a spaceship, a spacecraft with light made me think about the possible signals that we could detect from the sky from a civilization that is using this technology.”

For now, Loeb’s idea is just a theory. He and others say it will take more information to know if his theory is right.

Source: VOA

Fusion

March 25, 2017 :: Posted by - admin :: Category - Filmbutiken

Beauty and the Beast Is Disney’s Latest Mega Production

March 17, 2017 :: Posted by - admin :: Category - Filmbutiken

Beauty and the Beast is a tale for the ages. We’ve read it in fairytale books and watched it in numerous TV and movie adaptations. Maybe the most memorable of this classic was the iconic 1991 Disney animation. With its infectious songs and beautiful graphics, the film entered the popular mainstream worldwide.

Now, Disney is reviving its 1991 Beauty and the Beast rendition with live action heroes, making this Disney’s latest live action fairytale production, but by no means its last.

The film opens the same way as its 1991 predecessor. Emma Watson inhabits the role of Belle, the iconic character from the 1991 animated film. She says live action fairytales are likely to draw people of all ages into the theaters.

“As a child you love Disney, but as an adult you still love Disney because it sort of connects you with that childlike feeling that everything is going to be OK and there’s hope in the world,” Watson said.

It was this nostalgia that made Disney invest $300 million in this lavish musical, with Oscar winning filmmaker Bill Condon at the helm. The film offers background stories that add depth to their characters, such as Belle.

“It really was the first modern Disney heroine,” the filmmaker said. “A Disney princess who doesn’t want to be a princess, who doesn’t care about finding the prince. Someone who’s more interested in books and seeing the world and kind of figuring out who she is than in finding a guy and getting married. She happens to do those things by the end, but it’s not because that’s her main interest.”

Watson says the evolution of the romance between Belle and the Beast also is more complex than it was in its previous incarnations.

“Beast and Belle really dislike each other at the beginning, they really don’t get on, and then they form a friendship and then they fall in love,” she said.

Apart from Watson, the film includes a long list of famous actors. Kevin Klein interprets Belle’s quirky father. Ewan McGreggor, who plays the enchanted candelabra, and others lend their voices to digitally generated characters.

New songs were added to the original ones by Alan Menken, Howard Ashman and Tim Rice. Such a wealth of raw talent in acting, production, costumes and music bolstered Disney’s decision to take the financial gamble.