Tuesday March 26, 2019
Home Lead Story Stars’ ...

Stars’ ‘DNA’ could help scientists find Sun’s lost siblings

Unfortunately, astronomers cannot collect the DNA of a star with a mouth swab but instead use the starlight, with a technique called spectroscopy

0
//
UFO religion as a concept is now becoming a part of popular understanding.
Countless galaxies exist in the universe, each hiding secrets that humankind is yet to unearth. Pixabay

With the aim to find the lost siblings of the Sun, now scattered across the sky, a team of astronomers has collected the “DNA” of more than 340,000 stars in the Milky Way.

The “DNA” can help trace the ancestry of stars, showing astronomers how the universe went from having only hydrogen and helium — just after the Big Bang — to being filled today with all the elements we have here on Earth that are necessary for life.

Little Cub galaxy
Scientists to find sun’s lost siblings. Wikimedia Commons

The research, detailed in the journal Monthly Notices of the Royal Astronomical Society, is based on the Galactic Archaeology survey, called GALAH, launched in late 2013 as part of a quest to uncover the formulation and evolution of galaxies. When complete, GALAH will investigate more than a million stars.

The GALAH survey used the HERMES spectrograph at the Australian Astronomical Observatory’s (AAO) 3.9-metre Anglo-Australian Telescope near Coonabarabran in New South Wales to collect spectra for the 340,000 stars. “No other survey has been able to measure as many elements for as many stars as GALAH,” said Gayandhi De Silva of the University of Sydney and AAO.

Also Read: Next Planet-Hunting Mission Of NASA Postponed

“This data will enable such discoveries as the original star clusters of the Galaxy, including the Sun’s birth cluster and solar siblings — there is no other dataset like this ever collected anywhere else in the world,” De Silva said.

The Sun, like all stars, was born in a group or cluster of thousands of stars, explained Sarah Martell from the University of New South Wales (UNSW) Sydney who leads the GALAH survey observations. “Every star in that cluster will have the same chemical composition, or DNA – these clusters are quickly pulled apart by our Milky Way Galaxy and are now scattered across the sky,” Martell said.

Black hole in milky way
Scientists are collecting DNA of stars. VOA

“The GALAH team’s aim is to make DNA matches between stars to find their long-lost sisters and brothers,” she added. For each star, this DNA is the amount they contain of each of nearly two dozen chemical elements such as oxygen, aluminium and iron.

Unfortunately, astronomers cannot collect the DNA of a star with a mouth swab but instead use the starlight, with a technique called spectroscopy. The light from the star is collected by the telescope and then passed through an instrument called a spectrograph, which splits the light into detailed rainbows, or spectra. IANS

Next Story

Novel Device by Microsoft Can Store Digital Info as DNA

Further, the team also developed techniques to search for and retrieve only images that contain an apple or a green bicycle — using the molecules themselves and without having to convert the files back into a digital format

0
Microsoft, Taiwan AI
A man walks past a Microsoft sign set up for the Microsoft BUILD conference at Moscone Center in San Francisco, April 28, 2015. VOA

Tech major Microsoft has successfully developed an end-to-end automated DNA storage device that can translate digital information into DNA and back to bits, the company said in a blog post.

The fully automated system to store and retrieve data in manufactured DNA is a key step in moving the technology out of the research lab and into commercial datacenters.

The novel system, developed in partnership with University of Washington, translated “HELLO” into DNA and converted it back to digital data in just 21 hours, reported the paper published in Nature Scientific Reports journal.

“Our ultimate goal is to put a system into production that, to the end user, looks very much like any other cloud storage service — bits are sent to a datacenter and stored there and then they just appear when the customer wants them,” Karin Strauss, principal researcher at Microsoft, wrote in the post on Thursday.

“To do that, we needed to prove that this is practical from an automation perspective,” Strauss added.

The system has so far stored one gigabyte of data in DNA, which includes cat photographs, great literary works, pop videos as well as archival recordings in DNA, which could be retrieved without errors, the researchers said.

microsoft
FILE – Microsoft Corp. signage is seen outside the Microsoft Visitor Center in Redmond, Washington, July 3, 2014. VOA

The automated DNA data storage system uses software that converts the ones and zeros of digital data into the As, Ts, Cs and Gs that make up the building blocks of DNA.

Then it uses cheap lab equipments to flow the necessary liquids and chemicals into a synthesiser that builds manufactured snippets of DNA and to push them into a storage vessel.

When the system needs to retrieve the information, it adds other chemicals to properly prepare the DNA and uses microfluidic pumps to push the liquids into other parts of the system that “read” the DNA sequences and convert it back to information that a computer can understand.

Also Read- Top Priorities of Tesla CEO Include Car Deliveries

Information is stored in synthetic DNA molecules created in a lab, not DNA from humans or other living things, and can be encrypted before it is sent to the system.

Further, the team also developed techniques to search for and retrieve only images that contain an apple or a green bicycle — using the molecules themselves and without having to convert the files back into a digital format.

“We are definitely seeing a new kind of computer system being born here where you are using molecules to store data and electronics for control and processing. Putting them together holds some really interesting possibilities for the future,” said Luis Ceze, Professor at the varsity. (IANS)