|We are looking for Europeans of different nationalities that can speak about the refugee invasion in your country and how this REALLY is affecting you. Are you in Hungary, Greece, Germany, France, Italy, Austria or another country being heavily invaded? Please reach out: firstname.lastname@example.org or @rediceradio We want to speak with you!|
Many planets may have double suns
The dual suns that rise and set over Luke Skywalker's homeworld in the film Star Wars may be more than just fantasy, according to data from Nasa.
A still from Star Wars: Episode IV - A New Hope. After discussing his future plans with his Uncle Owen, Luke Skywalker leaves the Lars Homestead and heads towards the vista to watch the twin suns of Tatooine set while he reflects upon his destiny. © Lucasfilm Ltd. & TM. All Rights Reserved.
In a classic scene from the 1977 movie, the hero gazes into the distance as two yellow suns set on the horizon.
Nasa's Spitzer Space Telescope has found that planetary systems are as common around double stars as they are around single stars, like our own Sun.
Details of the research have been published in the Astrophysical Journal.
In the study, a team of researchers used an infrared camera on the Spitzer telescope to search for so-called dusty discs around binary, or double, stars.
Dusty discs are made from the leftover debris of planet formation.
"We knew the stars would be there, the question was whether there was a planet to be the place where you could stand and see these sunsets," said Karl Stapelfeldt, a scientist at Nasa's Jet Propulsion Laboratory (JPL) in Pasadena, California.
"The inference is getting stronger now that there must be such planets based on what Spitzer has found."
The presence of planets in dusty discs is thought likely, but is by no means certain.
"In our Solar System, asteroids collide with each other and produce showers of dust and that is, we assume, what we're seeing in these other discs - the dust produced by the collision of two bigger bodies," lead author David Trilling, from the University of Arizona, told BBC News.
"We can infer that there are bigger bodies like asteroids. The next logical leap is that if there are processes that formed these bigger bodies like asteroids, those same processes may also have formed planets."
The team looked for dusty discs in 69 binary systems between about 50 and 200 light-years away from Earth.
Planets could be commonplace around binary stars
The data show that about 40% of double systems had dusty discs - slightly higher than the frequency for a similar sample of single stars.
This finding suggests that planetary systems are at least as common around these binary stars as they are around single stars like our Sun.
In systems where stars are 50-500 astronomical units (50-500 times the distance from the Earth to the Sun) apart, dusty discs circle one of the pairs of stars.
But the researchers found no discs in binary systems where stars were 3-50 astronomical units (AU) apart.
In these double systems, Dr Trilling suggests, gravitational forces may kick debris out into deep space, preventing the formation of planets.
When the team looked at even more closely spaced binary stars - positioned at three to zero astronomical units distance - they were surprised to find that dusty discs were common, occurring in about 60% of cases.
|Nasa's Spitzer infrared telescope|
In these systems, a dusty disc circles both stars, rather than just one. Any planets orbiting these close-knit star systems would experience sunsets similar to the one depicted on the fictional desert world of Tatooine in Star Wars: Episode IV - A New Hope.
"The number of potential sites for planets has just increased enormously, because now we know these multiple star systems may be commonly associated with planetary formation," said Dr Trilling.
Dr Trilling said that if planets did exist in dusty discs around these binaries, they might be at distances where the conditions could be hospitable for life.
"The Luke Skywalker picture is science fiction. But I don't see anything that's astronomically incorrect about it," said the University of Arizona researcher.
"With some of our systems, you could play with the geometry, put a planet there, get the temperatures right and make it look just like [Tatooine]."
"Of course, we don't know anything about planets in these systems - it's all imagination - but it looks fine."
Article from: http://news.bbc.co.uk/2/hi/science/nature/6506081.stm
Our Binary System
Jupiter: The Star that Might Have Been
Tut's gem hints at space impact
Latest News from our Front Page
Europeâ€™s Rape Epidemic: Western Women Will Be Sacrificed At The Altar Of Mass Migration
Fast forward eight months or so, and I am living in a new flat with a female friend of mine. Late one night, while my friend and I were sitting talking in her room, someone let himself in. He immediately decided to take his trousers off and walk in to the bedroom with a stupid â€śentitledâ€ť grin on his face. ...
College diversity officer charged for #KillAllWhiteMen tweet
A U.K. college diversity officer’s utopia would include no white men – after they are all executed.
An employee of Goldsmiths University of London’s independent students’ union was arrested in London Tuesday and charged with sending a menacing or offensive messages via a public network for her “#killallwhitemen” tweets.
Bahar Mustafa, 28, faces one charge each for electronic communications she sent over ...
Paedo deported from UK sneaked back and worked with kids for two years before being caught
Landazuri worked with teenagers for two years before he was caught
Juan Guerra Landazuri successfully lived in Britain with his new identity for two years and even got a job helping vulnerable teenagers - despite being banned from working with children for life.
The 44-year-old, originally known as Juan Alejandro Guerra, was jailed for four years in 2002 for two offences of ...
Why Don't More Minorities Hike?
As a Bay Area native, I grew up in outdoor spaces. While hiking trails in Tilden Park in the East Bay and in the Marin Headlands in the North Bay, I gained an appreciation of and respect for natural spaces that eventually led me to visit our national parksâ€”Yosemite being my favorite.
It was in Yosemite that I started to notice ...
NYU Professor: Fight climate change with hormone treatments on small children, 'closes the growth plates'
‘Interviewed on the Sunrise Weekend morning show, NYU Professor Matthew Liao promotes hormone treatments on children ‘when their small’ to close their ‘growth plates’ and thus stunt child growth.
Professor Liao says this helps fight climate change since ‘larger people consume more energy than smaller people.”
|More News » |