Live
- Chhattisgarh CM Sai briefs HM Amit Shah on progress in Maoist-affected areas
- Bengal PDS case: ED seeks report on medical conditions of jailed former minister
- Siddharth's Romantic Drama Miss You Set to Hit Theaters on November 29
- India’s 1st AI data bank to boost national security launched
- Humbled to receive 'Key to the City of Georgetown', says PM Modi in Guyana
- 11 lakh BPL cards revoked, claims K’taka BJP
- Exit polls results indicated victory of the NDA government in Maharashtra and Jharkhand!
- Deputy CM Bhatti Vikramarka Reviews SC/ST Development Funds Implementation
- AP cabinet approves key decisions, check here
- Maharashtra records 58.22 pc turnout, Independent candidate dies of heart attack in Beed
Milky Way full of ‘space grease’
Melbourne : The galaxy is rich in grease-like molecules, say scientists who have estimated the amount of \'space grease\' found in the Milky Way. Organic matter of different kinds contains carbon, an element considered essential for life.
Melbourne : The galaxy is rich in grease-like molecules, say scientists who have estimated the amount of 'space grease' found in the Milky Way. Organic matter of different kinds contains carbon, an element considered essential for life. There is though real uncertainty over its abundance, and only half the carbon expected is found between the stars in its pure form. The rest is chemically bound in two main forms, grease-like (aliphatic) and mothball-like (aromatic).
The researchers from University of New South Wales (UNSW) in Australia used a laboratory to create material with the same properties as interstellar dust. They mimicked the process by which organic molecules are synthesised in the outflows of carbon stars, by expanding a carbon-containing plasma into a vacuum at low temperature. The material was collected and then analysed by a combination of techniques.
Using magnetic resonance and spectroscopy (splitting light into its constituent wavelengths) they were able to determine how strongly the material absorbed light with a certain infrared wavelength, a marker for aliphatic carbon. "Combining our lab results with observations from astronomical observatories allows us to measure the amount of aliphatic carbon between us and the stars," said Tim Schmidt, from UNSW.
The study, published in the journal Monthly Notices of the Royal Astronomical Society, found that there are about 100 greasy carbon atoms for every million hydrogen atoms, accounting for between a quarter and a half of the available carbon. In the Milky Way galaxy, this amounts to about 10 billion trillion trillion tonnes of greasy matter, or enough for 40 trillion trillion trillion packs of butter.
"It's also intriguing that organic material of this kind - material that gets incorporated into planetary systems - is so abundant," he said. The team now wants to determine the abundance of the mothball-like carbon, which will involve yet more challenging work in the laboratory. By firmly establishing the amount of each type of carbon in the dust, they will know precisely how much of this element is available to create life.
