Saturday, October 16, 2021

Indian Observatories becoming prime location for deep Space Studies

India is geographically blessed with unique locations which offer views that are mesmerizing. But apart from breath-taking and eye-catching views, India is also emerging as a hot spot for astronomical studies. As per a recent study published in the Monthly Notices for Royal Astronomical Society, the Indian Astronomical Observatory (IAO) which is located in Hanle near Leh in Ladakh has become a prime site for infrared and optical astronomical studies.

The Study:

The study which was carried out by a team of researchers belonging to India as well as other countries highlighted that the quality of observable nights for different astronomical usages qualifies by the IAO of Hanle. The above mentioned different astronomical usages include photometry and spectroscopy. The researchers studied the nighttime cloud cover fraction over eight high altitude observatories among which three belonged to India. The eight observatories included:

– Indian Astronomical Observatory (Hanle and Merak, Ladakh)
– Devasthal (Nainital)
– Ali Observatory in China
– South African Large Telescope in South Africa
– University of Tokyo Atacama Observatory and Paranal in Chile
– National Astronomical Observatory in Mexico

Probing into why Indian Observatory became a prime location:

Before probing into the matter of why the Indian Observatory is becoming a prime location; it is important to note that deep space study requires some essential criteria. In order to conduct a deep space study, the non-interruption by the monsoon, clear night, atmospheric conditions among other factors are essential to be noted. For Indian Astronomical Observatory, most of the criteria were rather satisfying. The benefit of crystal clear nights along with minimal light pollution, background aerosol concentration, no interruption by the monsoon, extremely dry atmosphere condition, contributed in one of the promising observatory sites globally.

As per the study, researchers found that the Indian Astronomical Observatory located in the Hanle site is as dry as the Atacama Desert located in Chile and also, it is much drier than Devasthal, Nanital location. It is fascinating to note that the site offers around 270 clear nights in a year. While Hanle offers a clear and magnificent sky for probing into the mysterious deep space studies, the best site among the eight is Paranal which is located in a high-altitude desert of Chile and this site offers 87% clear nights in a year.

The future prospects become more clearer with clear nights:

“Studying the variation of atmospheric parameters from 1980 to 2020 for all sites, the researchers found decreasing trends for the cloud cover fraction over the central region of Africa, the Eurasian continent, and the American continents. They noticed an increasing trend in the maritime region as well as land regions in the Sahara Desert, the Middle East, Indian sub-continent, the Tibetan Plateau and some of the Southeast Asian islands,” the Ministry of Science & Technology said in a statement.

The Ministry believes that the study could pave the way for the Indian government to establish
more such observatories and telescopes in the vicinity of the region, therefore making it a prime location for astronomical observations.

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