Astronomers find first carbon-rich asteroid in Kuiper Belt
Washington, May 10: Astronomers have discovered an unusual carbon-rich asteroid in the Kuiper Belt -- the first of its kind to be confirmed in the cold outer reaches of the solar system.
This object, designated 2004 EW95, likely formed in the asteroid belt between Mars and Jupiter and has been flung billions of kilometres from its origin to its current home in the Kuiper Belt, the study said.
The researchers found that the asteroid's reflectance spectrum -- the specific pattern of wavelengths of light reflected from an object -- was different to that of similar small Kuiper Belt Objects (KBOs), which typically have uninteresting, featureless spectra that reveal little information about their composition.
"The reflectance spectrum of 2004 EW95 was clearly distinct from the other observed outer Solar System objects," explained lead author Tom Seccull of Queen's University Belfast in Britain
"It looked enough of a weirdo for us to take a closer look," Seccull added.
Theoretical models of the early days of our solar system predict that after the gas giants formed they rampaged through the solar system, ejecting small rocky bodies from the inner solar system to far-flung orbits at great distances from the Sun.
In particular, these models suggest that the Kuiper Belt -- a cold region beyond the orbit of Neptune -- should contain a small fraction of rocky bodies from the inner solar system, such as carbon-rich asteroids, referred to as carbonaceous asteroids.
The new study, published in The Astrophysical Journal, presented evidence for the first reliably-observed carbonaceous asteroid in the Kuiper Belt, providing strong support for these theoretical models of our solar system's troubled youth.
After measurements from multiple instruments at European Southern Observatory's Very Large Telescope (VLT), the team of astronomers was able to measure the composition of the object.
The results suggest that it originally formed in the inner solar system and must have since migrated outwards.
Let the Truth be known. If you read VB and like VB, please be a VB Supporter and Help us deliver the Truth to one and all.
Confident we are going to win Kerala: Shashi Tharoor
New Delhi (PTI): Congress leader Shashi Tharoor on Thursday expressed confidence in the victory of the United Democratic Front (UDF) in Kerala, saying the Congress-led alliance will win more than 75 seats out of the total 140 in the state.
Tharoor, who hails from Kerala, said he was not surprised to see the results of the exit polls, most of which predicted a victory for the UDF that has been out of power for 10 years in the state.
"We have been on the ground. I have campaigned in 59 constituencies across 12 districts out of 14. I was very confident we are going to win.
"Everything that I have picked up from not just my party colleagues and workers but also from other observers, media and others have always convinced me that we were going to score a comfortable win of above 75 seats. And all the (exit) polls have confirmed the same thing," he told reporters here.
The Thiruvananthapuram MP said he was not surprised to see the results of the exit polls but in general he was not a big fan of exit polls in India.
"Because ours is not purely a homogenous society. We have to take into account gender issue, caste issue, class issue, regional disparities. You never get a convincingly large enough sample to give an accurate poll and now there is the additional complication that we have heard about in West Bengal this year that many people are unwilling to answer the questions of the pollsters," he said.
The Congress leader said normally, it used to be below 10 per cent that people said that they would not answer.
"Even if you are a reputable exit pollster, in Bengal, one polling company has said 60 per cent of people refused to answer. So, what is the worth of a poll where 60 per cent of your respondents have not answered," he said.
Several exit polls on Wednesday predicted a comeback by the Congress-led UDF in Kerala after 10 years, dethroning the CPI(M)-led Left Democratic Front (LDF).
Polling for the 140-member Kerala assembly was held on April 9. Results of assembly elections in West Bengal, Tamil Nadu, Assam, Puducherry, besides Kerala, will be announced on May 4.
